{"id":3700,"date":"2026-08-14T19:25:51","date_gmt":"2026-08-14T19:25:51","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=3700"},"modified":"2026-08-14T19:25:51","modified_gmt":"2026-08-14T19:25:51","slug":"maximum-resistance-recommended-for-commercial-building-electrical-installation","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/ar\/blog\/maximum-resistance-recommended-for-commercial-building-electrical-installation\/","title":{"rendered":"\u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0642\u0635\u0648\u0649 \u0627\u0644\u0645\u0648\u0635\u0649 \u0628\u0647\u0627 \u0644\u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0621 \u0641\u064a \u0627\u0644\u0645\u0628\u0627\u0646\u064a \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629"},"content":{"rendered":"<p>\u064a\u0623\u062a\u064a \u0634\u062e\u0635 \u0644\u0625\u062c\u0631\u0627\u0621 \u0641\u062d\u0635 \u0643\u0647\u0631\u0628\u0627\u0626\u064a \u0641\u064a \u0645\u0628\u0646\u0627\u0643 \u0627\u0644\u062a\u062c\u0627\u0631\u064a. \u064a\u064f\u0628\u0644\u063a \u0627\u0644\u0645\u0647\u0646\u062f\u0633 \u0623\u0646\u0647 \u062a\u0645 \u0627\u062e\u062a\u0628\u0627\u0631 \u0642\u0637\u0628 \u0627\u0644\u0623\u0631\u0636 \u0639\u0646\u062f 22 \u0623\u0648\u0645. \u064a\u0642\u0648\u0644 \u0634\u062e\u0635 \u0642\u0631\u064a\u0628 \u0625\u0646 NEC \u064a\u0633\u0645\u062d \u0628\u0640 25 \u0623\u0648\u0645\u060c \u0644\u0630\u0627 \u0643\u0644 \u0634\u064a\u0621 \u0639\u0644\u0649 \u0645\u0627 \u064a\u0631\u0627\u0645. \u0644\u0643\u0646 \u062f\u0644\u064a\u0644 \u0627\u0644\u0634\u0631\u0643\u0629 \u0627\u0644\u0645\u0635\u0646\u0639\u0629 \u0644\u0644\u0645\u0639\u062f\u0627\u062a \u064a\u0646\u0635 \u0639\u0644\u0649 \u0623\u0646 \u0627\u0644\u062d\u062f \u0627\u0644\u0623\u0642\u0635\u0649 \u0647\u0648 5 \u0623\u0648\u0645 \u0644\u0623\u0646\u0647 \u064a\u0639\u0645\u0644 \u0645\u0639 \u0625\u0644\u0643\u062a\u0631\u0648\u0646\u064a\u0627\u062a \u062d\u0633\u0627\u0633\u0629\u061b \u0644\u0630\u0644\u0643 \u064a\u0633\u062a\u0634\u0647\u062f \u0645\u0647\u0646\u062f\u0633 \u0627\u0644\u062a\u0643\u0644\u064a\u0641 \u0628\u0645\u0648\u0627\u0635\u0641\u0629 \u062c\u062f\u064a\u062f\u0629 \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0643. \u0623\u064a \u0642\u064a\u0645\u0629 \u064a\u062c\u0628 \u0627\u062a\u0628\u0627\u0639\u0647\u0627\u061f \u0627\u0644\u0633\u0624\u0627\u0644 \u0627\u0644\u0645\u0637\u0631\u0648\u062d \u0634\u0627\u0626\u0639 \u062c\u062f\u064b\u0627 \u0644\u0623\u0648\u0644\u0626\u0643 \u0627\u0644\u0630\u064a\u0646 \u064a\u0639\u0645\u0644\u0648\u0646 \u0641\u064a \u0627\u0644\u0645\u062c\u0627\u0644 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u060c \u0644\u0643\u0646 \u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u062a\u0639\u062a\u0645\u062f \u0639\u0644\u0649 \u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u0630\u064a \u062a\u0642\u064a\u0633 \u0648\u0641\u0642\u064b\u0627 \u0644\u0647.<\/p>\n<p>\u064a\u0639\u0631\u0636 \u0644\u0643 \u0647\u0630\u0627 \u0627\u0644\u0646\u0635 \u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u0641\u0648\u0631\u064b\u0627 \u0628\u0627\u0644\u0623\u0631\u0642\u0627\u0645 \u0627\u0644\u062f\u0642\u064a\u0642\u0629 \u0627\u0644\u0635\u062d\u064a\u062d\u0629 \u2013 \u0644\u0646 \u062a\u064f\u0633\u062a\u062e\u062f\u0645 \u0623\u0631\u0642\u0627\u0645 \u0648\u0647\u0645\u064a\u0629. \u0633\u062a\u062a\u0639\u0631\u0641 \u0639\u0644\u0649 \u0645\u0627 \u064a\u062a\u0637\u0644\u0628\u0647 NEC \u0628\u0627\u0644\u0636\u0628\u0637\u060c \u0648\u0645\u0627 \u064a\u0642\u0648\u0644\u0647 IEEE\u060c \u0648\u0643\u064a\u0641 \u062a\u0639\u0645\u0644 \u201c\u0642\u0627\u0639\u062f\u0629 25 \u0623\u0648\u0645\u201d\u060c \u0648\u0645\u0627 \u064a\u064f\u0639\u062a\u0628\u0631 \u0622\u0645\u0646\u064b\u0627.<\/p>\n<blockquote><p>\u0625\u0630\u0627 \u0643\u0646\u062a \u062a\u0628\u062d\u062b \u0639\u0646 \u0625\u062c\u0627\u0628\u0629 \u0633\u0631\u064a\u0639\u0629\u060c \u0641\u0644\u0627 \u064a\u0648\u062c\u062f \u0631\u0642\u0645 \u0645\u062d\u062f\u062f \u0648\u0627\u0636\u062d \u064a\u0646\u0637\u0628\u0642 \u0639\u0627\u0644\u0645\u064a\u064b\u0627 \u0639\u0644\u0649 \u0627\u0644\u062d\u062f \u0627\u0644\u0623\u0642\u0635\u0649 \u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0641\u064a \u062c\u0645\u064a\u0639 \u0627\u0644\u0645\u0628\u0627\u0646\u064a \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629 \u0644\u0623\u0646 \u0647\u0630\u0647 \u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u062a\u0639\u062a\u0645\u062f \u0639\u0644\u0649 \u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0648\u0627\u0644\u062c\u0632\u0621 \u0645\u0646 \u0627\u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0630\u064a \u062a\u0642\u0635\u062f\u0647. \u0644\u0627 \u064a\u062d\u062a\u0648\u064a NEC (NFPA 70) \u0639\u0644\u0649 \u0645\u0642\u0627\u0648\u0645\u0629 \u0642\u0635\u0648\u0649 \u0639\u0627\u0645\u0629 \u0644\u0644\u0645\u0628\u0646\u0649\u060c \u0628\u0644 \u0625\u0646 \u0627\u0644\u062c\u0645\u0639 \u0628\u064a\u0646 25 \u0623\u0648\u0645 (\u0627\u0644\u0630\u064a \u064a\u062a\u0645 \u062a\u062d\u062f\u064a\u062f\u0647 \u0641\u0639\u0644\u064a\u064b\u0627 \u0641\u064a 250.53) \u064a\u062d\u0645\u0644 \u0645\u0639\u0646\u0649 \u0639\u0645\u0644\u064a\u064b\u0627 \u0639\u0646\u062f \u0627\u0644\u062d\u062f\u064a\u062b \u0639\u0646 \u0642\u0636\u064a\u0628 \u0623\u0648 \u0644\u0648\u062d\u0629 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0641\u0642\u0637 \u0648\u064a\u064f\u0633\u062a\u062e\u062f\u0645 \u0641\u0642\u0637 \u0644\u0645\u0639\u0631\u0641\u0629 \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0642\u0636\u064a\u0628 \u0623\u0648 \u0644\u0648\u062d\u0629 \u0648\u0627\u062d\u062f\u0629 \u0643\u0627\u0641\u064a\u0629 \u0644\u0642\u0637\u0628 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 (\u0623\u064a \u0625\u0630\u0627 \u0643\u0627\u0646 \u0642\u0637\u0628 \u0648\u0627\u062d\u062f 25 \u0623\u0648\u0645 \u0623\u0648 \u0623\u0642\u0644\u060c \u0641\u0644\u0627 \u062d\u0627\u062c\u0629 \u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062b\u0627\u0646\u064a). \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0644\u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629 \u0648\u0627\u0644\u0635\u0646\u0627\u0639\u064a\u0629 \u0627\u0644\u0643\u0628\u064a\u0631\u0629\u060c \u064a\u062d\u062f\u062f \u0645\u0639\u064a\u0627\u0631 IEEE Std 142 (\u201c\u0627\u0644\u0643\u062a\u0627\u0628 \u0627\u0644\u0623\u062e\u0636\u0631\u201d) \u0623\u0646 \u0645\u0642\u0627\u0648\u0645\u0629 \u0642\u0637\u0628 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0627\u0644\u0623\u0633\u0627\u0633\u064a \u0644\u0644\u0623\u0631\u0636 \u064a\u062c\u0628 \u0623\u0646 \u062a\u0643\u0648\u0646 \u0641\u064a \u0646\u0637\u0627\u0642 1-5 \u0623\u0648\u0645\u060c \u0648\u062a\u0647\u062f\u0641 \u0645\u0645\u0627\u0631\u0633\u0627\u062a \u0627\u0644\u0635\u0646\u0627\u0639\u0629 (\u062a\u0648\u0635\u064a\u0627\u062a NFPA\/IEEE\u060c \u0645\u0645\u0627\u0631\u0633\u0627\u062a NETA ATS\u060c \u0645\u0639\u0627\u064a\u064a\u0631 \u0635\u0646\u0627\u0639\u0629 \u0627\u0644\u0627\u062a\u0635\u0627\u0644\u0627\u062a\u060c \u0625\u0644\u062e) \u0625\u0644\u0649 \u0648\u062c\u0648\u062f \u062d\u0648\u0627\u0644\u064a 5 \u0623\u0648\u0645 \u0644\u0644\u0645\u0628\u0627\u0646\u064a \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629 \u0648\u062d\u062a\u0649 1 \u0623\u0648\u0645 \u0644\u0644\u0645\u062d\u0637\u0627\u062a \u0627\u0644\u0641\u0631\u0639\u064a\u0629 \u0648\u0645\u062d\u0637\u0627\u062a \u0627\u0644\u062a\u0648\u0644\u064a\u062f. \u0644\u062a\u062c\u0645\u064a\u0639 \u0630\u0644\u0643\u060c \u0645\u062a\u0637\u0644\u0628\u0627\u062a NEC \u0627\u0644\u062f\u0646\u064a\u0627 \u0644\u064a\u0633\u062a \u0645\u0631\u062a\u0628\u0637\u0629 \u0628\u0627\u0644\u0623\u062f\u0627\u0621 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0645\u0646 IEEE \u0645\u0646 \u062d\u064a\u062b \u0646\u0637\u0627\u0642 \u0627\u0644\u0642\u064a\u0645 1-5 \u0623\u0648\u0645 \u0644\u0644\u0645\u0628\u0627\u0646\u064a \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629 \u0627\u0644\u062a\u064a \u062a\u0645 \u0642\u0628\u0648\u0644\u0647\u0627 \u0628\u0634\u0643\u0644 \u0634\u0627\u0626\u0639 \u0643\u0642\u064a\u0645\u0629 \u0645\u0633\u062a\u0647\u062f\u0641\u0629 \u0641\u064a \u0627\u0644\u0635\u0646\u0627\u0639\u0629\u060c \u0641\u064a \u062d\u064a\u0646 \u064a\u064f\u0639\u062a\u0628\u0631 \u0623\u064a \u0634\u064a\u0621 \u0641\u0648\u0642 25 \u0623\u0648\u0645 \u0636\u0639\u064a\u0641\u064b\u0627 \u0648\u063a\u064a\u0631 \u0645\u0642\u0628\u0648\u0644 \u0641\u064a \u0642\u0637\u0628 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0627\u0644\u062a\u062c\u0627\u0631\u064a.<\/p><\/blockquote>\n<p>\u0644\u0646\u0643\u0646 \u062f\u0642\u064a\u0642\u064a\u0646\u060c \u0644\u0623\u0646 \u0647\u0646\u0627 \u062a\u0643\u0645\u0646 \u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u062e\u0627\u0637\u0626\u0629. \u0627\u0644\u0623\u0631\u0642\u0627\u0645 \u0630\u0627\u062a \u0627\u0644\u0635\u0644\u0629\u060c \u0645\u0639 \u0645\u0635\u0627\u062f\u0631\u0647\u0627:<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3702\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/08\/traget-5-ohms-or-less.webp\" alt=\"traget 5 ohms or less\" width=\"1448\" height=\"1086\" \/><\/p>\n<table>\n<thead>\n<tr>\n<th>\u0627\u0644\u0645\u0639\u064a\u0627\u0631 \/ \u0627\u0644\u0625\u0631\u0634\u0627\u062f<\/th>\n<th>\u0627\u0644\u0642\u064a\u0645\u0629<\/th>\n<th>\u0645\u0627 \u064a\u0646\u0637\u0628\u0642 \u0639\u0644\u064a\u0647<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>NEC 250.53 (NFPA 70)<\/td>\n<td>25 \u0623\u0648\u0645<\/td>\n<td>\u0642\u0637\u0628 \u0642\u0636\u064a\u0628\/\u0644\u0648\u062d\u0629 \u0648\u0627\u062d\u062f \u2014 \u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0627\u062e\u062a\u0628\u0627\u0631 25\u03a9 \u0623\u0648 \u0623\u0642\u0644\u060c \u0644\u0627 \u064a\u0644\u0632\u0645 \u0642\u0637\u0628 \u062b\u0627\u0646\u064a<\/td>\n<\/tr>\n<tr>\n<td>NEC 250.53 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636\u064a<\/td>\n<td>\u0642\u0637\u0628\u0627\u0646<\/td>\n<td>\u0642\u0637\u0628\/\u0623\u0646\u0628\u0648\u0628\/\u0644\u0648\u062d\u0629 \u0627\u0641\u062a\u0631\u0627\u0636\u064a\u064b\u0627 \u0627\u062b\u0646\u0627\u0646\u061b \u0644\u0627 \u062d\u0627\u062c\u0629 \u0644\u0627\u062e\u062a\u0628\u0627\u0631 25\u03a9 \u0639\u0646\u062f \u062a\u0631\u0643\u064a\u0628 \u0643\u0644\u0627\u0647\u0645\u0627<\/td>\n<\/tr>\n<tr>\n<td>IEEE Std 142 (\u0627\u0644\u0643\u062a\u0627\u0628 \u0627\u0644\u0623\u062e\u0636\u0631)<\/td>\n<td>1\u20135 \u0623\u0648\u0645<\/td>\n<td>\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0623\u0631\u0636 \u0627\u0644\u0645\u0648\u0635\u0649 \u0628\u0647\u0627 \u0644\u0642\u0637\u0628 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0627\u0644\u0631\u0626\u064a\u0633\u064a \u0644\u0644\u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629\/\u0627\u0644\u0635\u0646\u0627\u0639\u064a\u0629 \u0627\u0644\u0643\u0628\u064a\u0631\u0629<\/td>\n<\/tr>\n<tr>\n<td>IEEE Std 80<\/td>\n<td>5\u20131 \u0623\u0648\u0645<\/td>\n<td>\u0634\u0628\u0643\u0627\u062a \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0644\u0644\u0645\u062d\u0637\u0627\u062a \u0627\u0644\u0641\u0631\u0639\u064a\u0629 \/ \u0645\u062d\u0637\u0627\u062a \u0627\u0644\u062a\u0648\u0644\u064a\u062f<\/td>\n<\/tr>\n<tr>\n<td>\u0625\u0631\u0634\u0627\u062f\u0627\u062a \u0635\u0646\u0627\u0639\u0629 NFPA\/IEEE<\/td>\n<td>5 \u0623\u0648\u0645 \u0623\u0648 \u0623\u0642\u0644<\/td>\n<td>\u0627\u0644\u0647\u062f\u0641 \u0627\u0644\u062a\u062c\u0627\u0631\u064a \u0627\u0644\u0634\u0627\u0626\u0639 \u0627\u0644\u0627\u0633\u062a\u0634\u0647\u0627\u062f \u0628\u0647\u061b \u0645\u0639\u064a\u0627\u0631 \u0635\u0646\u0627\u0639\u0629 \u0627\u0644\u0627\u062a\u0635\u0627\u0644\u0627\u062a<\/td>\n<\/tr>\n<tr>\n<td>\u0627\u062e\u062a\u0628\u0627\u0631 \u0642\u0628\u0648\u0644 NETA ATS<\/td>\n<td>5 \u0623\u0648\u0645 \/ 1 \u0623\u0648\u0645<\/td>\n<td>\u22645\u03a9 \u0644\u0644\u0645\u0628\u0627\u0646\u064a \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629\/\u0627\u0644\u0635\u0646\u0627\u0639\u064a\u0629 \u0627\u0644\u0643\u0628\u064a\u0631\u0629\u061b \u22641\u03a9 \u0644\u0645\u062d\u0637\u0627\u062a \u0627\u0644\u062a\u0648\u0644\u064a\u062f\/\u0627\u0644\u0646\u0642\u0644<\/td>\n<\/tr>\n<tr>\n<td>\u0645\u0635\u0646\u0639\u0648 \u0627\u0644\u0645\u0639\u062f\u0627\u062a<\/td>\n<td>&lt;1 \u0625\u0644\u0649 5 \u0623\u0648\u0645<\/td>\n<td>\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0625\u0644\u0643\u062a\u0631\u0648\u0646\u064a\u0627\u062a \u0627\u0644\u062d\u0633\u0627\u0633\u0629 \/ \u0645\u0639\u062f\u0627\u062a \u0627\u0644\u062a\u0634\u062e\u064a\u0635 \u0627\u0644\u0637\u0628\u064a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u062d\u0642\u064a\u0642\u0629 \u0645\u0647\u0645\u0629: \u0644\u0627 \u064a\u0648\u062c\u062f \u0645\u062a\u0637\u0644\u0628 \u0641\u064a NEC \u0628\u0623\u0646 \u064a\u0643\u0648\u0646 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0627\u0644\u062a\u062c\u0627\u0631\u064a \u201c25 \u0623\u0648\u0645 \u0623\u0648 \u0623\u0642\u0644\u201d. \u0627\u0644\u0631\u0642\u0645 25 \u0645\u062f\u0631\u062c \u0641\u0642\u0637 \u0644\u062a\u062d\u062f\u064a\u062f \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0647\u0646\u0627\u0643 \u062a\u0628\u0627\u0639\u062f \u0643\u0627\u0641\u064d \u0645\u0646 \u0642\u0637\u0628 \u062a\u0623\u0631\u064a\u0636 \u0648\u0627\u062d\u062f \u0641\u0642\u0637. \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0623\u062f\u0627\u0621 \u0645\u062b\u0644 IEEE 142 \u0648\u062a\u0648\u0635\u064a\u0627\u062a \u0648\u0645\u0645\u0627\u0631\u0633\u0627\u062a NETA \u062a\u0634\u064a\u0631 \u0625\u0644\u0649 \u0642\u064a\u0645\u0629 \u0628\u064a\u0646 1 \u0648 5 \u0623\u0648\u0645 \u2013 \u0645\u0639 \u0643\u0648\u0646 5 \u0623\u0648\u0645 \u0647\u0648 \u0627\u0644\u062d\u062f \u0627\u0644\u0623\u0643\u062b\u0631 \u0627\u0633\u062a\u062e\u062f\u0627\u0645\u064b\u0627.<\/p>\n<h2>\u0642\u0627\u0639\u062f\u0629 NEC 25 \u0623\u0648\u0645 \u2014 \u0645\u0627\u0630\u0627 \u062a\u0639\u0646\u064a \u062d\u0642\u064b\u0627<\/h2>\n<p>\u0648\u0641\u0642\u064b\u0627 \u0644\u0642\u0633\u0645 NEC 250.53(A)(2) (\u0648\u0643\u0630\u0644\u0643 \u0642\u0633\u0645 NEC 250-56 \u0644\u0639\u0627\u0645 2005)\u060c \u064a\u062a\u0637\u0644\u0628 \u0627\u0644\u0643\u0648\u062f \u062a\u0631\u0643\u064a\u0628 \u0642\u0637\u0628\u064a\u0646 \u062a\u0623\u0631\u064a\u0636. \u0648\u0645\u0639 \u0630\u0644\u0643\u060c \u0647\u0646\u0627\u0643 \u0627\u0633\u062a\u062b\u0646\u0627\u0621 \u0645\u0647\u0645 \u064a\u0646\u0635 \u0639\u0644\u0649 \u0627\u0644\u0633\u0645\u0627\u062d \u0628\u0642\u0637\u0628 \u0648\u0627\u062d\u062f \u0625\u0630\u0627 \u0627\u0633\u062a\u0648\u0641\u0649 \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0648\u0647\u064a 25 \u0623\u0648\u0645 \u0623\u0648 \u0623\u0642\u0644. \u0644\u0644\u0623\u0633\u0641\u060c \u063a\u0627\u0644\u0628\u064b\u0627 \u0645\u0627 \u064a\u064f\u0633\u0627\u0621 \u062a\u0641\u0633\u064a\u0631 \u0647\u0630\u0627 \u0639\u0644\u0649 \u0623\u0646\u0647 \u064a\u0645\u0643\u0646 \u062a\u0631\u0643\u064a\u0628 \u0642\u0637\u0628 \u0648\u0627\u062d\u062f \u0641\u0642\u0637\u060c \u0627\u062e\u062a\u0628\u0627\u0631 \u0645\u0642\u0627\u0648\u0645\u062a\u0647\u060c \u062b\u0645 \u0625\u0636\u0627\u0641\u0629 \u0627\u0644\u0642\u0637\u0628 \u0627\u0644\u062b\u0627\u0646\u064a \u0641\u064a \u062d\u0627\u0644 \u0644\u0645 \u064a\u0633\u062a\u0648\u0641\u0650 \u0627\u0644\u0642\u0637\u0628 \u0627\u0644\u0623\u0648\u0644 \u0645\u062a\u0637\u0644\u0628 \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0628\u0627\u0644\u063a 25 \u0623\u0648\u0645.<\/p>\n<p>\u0641\u064a \u0627\u0644\u0648\u0627\u0642\u0639\u060c \u0627\u0644\u062a\u0642\u0633\u064a\u0645 \u0643\u0645\u0627 \u064a\u0644\u064a:<\/p>\n<ul>\n<li>\u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636\u064a = \u062a\u0631\u0643\u064a\u0628 \u0642\u0637\u0628\u064a\u0646 \u0639\u0644\u0649 \u0627\u0644\u0623\u0642\u0644 6 \u0623\u0642\u062f\u0627\u0645 apart.<\/li>\n<li>\u0627\u0644\u0645\u0633\u0645\u0648\u062d = \u0642\u0637\u0628 \u0648\u0627\u062d\u062f \u064a\u062e\u0636\u0639 \u0644\u0627\u062e\u062a\u0628\u0627\u0631 \u0645\u0642\u0627\u0648\u0645\u0629 \u0635\u062d\u064a\u062d \u0644\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0623\u0646 \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 25\u03a9 \u0623\u0648 \u0623\u0642\u0644.<\/li>\n<\/ul>\n<p>\u0641\u064a \u062d\u0627\u0644 \u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u0642\u0637\u0628 \u0627\u0644\u062b\u0627\u0646\u064a\u060c \u0644\u0627 \u064a\u062c\u0628 \u0623\u0646 \u064a\u0641\u064a \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u0645\u0634\u062a\u0631\u0643 \u0628\u0634\u0631\u0637 25 \u0623\u0648\u0645 \u2014 \u062d\u064a\u062b \u064a\u064f\u0639\u062a\u0628\u0631 \u0627\u0644\u0642\u0637\u0628 \u0627\u0644\u062b\u0627\u0646\u064a \u0642\u062f \u0627\u0633\u062a\u0648\u0641\u0649 \u0645\u062a\u0637\u0644\u0628\u0627\u062a NEC \u0628\u0645\u062c\u0631\u062f \u062a\u0631\u0643\u064a\u0628\u0647.<\/p>\n<h2>IEEE 142 (\u0627\u0644\u0643\u062a\u0627\u0628 \u0627\u0644\u0623\u062e\u0636\u0631): \u062a\u0648\u0635\u064a\u0629 1\u20135 \u0623\u0648\u0645<\/h2>\n<p>\u0627\u0644\u0633\u0624\u0627\u0644\u060c \u201c\u0645\u0627 \u0647\u064a \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0645\u0648\u0635\u0649 \u0628\u0647\u0627 \u0644\u0644\u0647\u064a\u0643\u0644 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u061f\u201d \u064a\u062a\u0644\u0642\u0649 \u062d\u0644\u0627\u064b \u0647\u0646\u062f\u0633\u064a\u064b\u0627 \u0645\u0648\u062b\u0648\u0642\u064b\u0627 \u0645\u0646 IEEE Std 142\u060c \u0627\u0644\u0645\u0639\u0631\u0648\u0641 \u0628\u0627\u0644\u0643\u062a\u0627\u0628 \u0627\u0644\u0623\u062e\u0636\u0631. \u0627\u0644\u0627\u0642\u062a\u0631\u0627\u062d \u0647\u0648 \u0645\u0642\u0627\u0648\u0645\u0629 \u0623\u0631\u0636\u064a\u0629 \u0645\u0646 1 \u0625\u0644\u0649 5 \u0623\u0648\u0645 \u0644\u0642\u0637\u0628 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0627\u0644\u0631\u0626\u064a\u0633\u064a \u0641\u064a \u0627\u0644\u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u0635\u0646\u0627\u0639\u064a\u0629 \u0648\u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629 \u0627\u0644\u0643\u0628\u064a\u0631\u0629.<\/p>\n<p>\u0633\u0628\u0628 \u062a\u0641\u0636\u064a\u0644 \u0647\u0630\u0647 \u0627\u0644\u0642\u064a\u0645\u0629 \u0644\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0639\u0644\u0649 25 \u0623\u0648\u0645 \u0647\u0648 \u0623\u0646 \u0627\u0644\u0645\u0646\u0634\u0622\u062a \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629 \u063a\u0627\u0644\u0628\u064b\u0627 \u0645\u0627 \u062a\u0643\u0648\u0646 \u0645\u062c\u0647\u0632\u0629 \u0628\u0625\u0644\u0643\u062a\u0631\u0648\u0646\u064a\u0627\u062a \u062d\u0633\u0627\u0633\u0629\u060c \u0648\u0645\u0627 \u0625\u0644\u0649 \u0630\u0644\u0643\u060c \u0648\u0628\u0627\u0644\u062a\u0627\u0644\u064a \u062a\u062d\u062a\u0627\u062c \u0625\u0644\u0649 \u0645\u0631\u062c\u0639 \u062a\u0623\u0631\u064a\u0636 \u0645\u0633\u062a\u0642\u0631 \u0648\u0645\u0646\u062e\u0641\u0636 \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629\u060c \u0648\u0647\u0648 \u063a\u064a\u0631 \u0643\u0627\u0641\u064d \u0645\u0639 \u0627\u0644\u062d\u062f \u0627\u0644\u0623\u062f\u0646\u0649 \u0644\u0644\u0643\u0648\u062f \u0641\u0642\u0637. \u0648\u062c\u0648\u062f \u0645\u0642\u0627\u0648\u0645\u0629 \u062a\u0623\u0631\u064a\u0636 \u0645\u0646\u062e\u0641\u0636\u0629 \u0643\u0645\u0627 \u0647\u0648 \u0645\u0630\u0643\u0648\u0631 \u0623\u0639\u0644\u0627\u0647 \u064a\u0633\u0645\u062d \u0628\u0640:<\/p>\n<ul>\n<li>\u0639\u0648\u062f\u0629 \u062a\u064a\u0627\u0631 \u0627\u0644\u062e\u0637\u0623 \u0627\u0644\u0623\u0639\u0644\u0649 \u0625\u0644\u0649 \u0627\u0644\u0645\u0635\u062f\u0631 \u0628\u0634\u0643\u0644 \u0623\u0633\u0631\u0639<\/li>\n<li>\u0627\u0646\u062e\u0641\u0627\u0636 \u0627\u0631\u062a\u0641\u0627\u0639 \u0627\u0644\u062c\u0647\u062f \u0639\u0644\u0649 \u063a\u0644\u0627\u0641 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0623\u062b\u0646\u0627\u0621 \u0627\u0644\u062e\u0637\u0623<\/li>\n<li>\u062a\u062d\u0633\u064a\u0646 \u062a\u0641\u0631\u064a\u063a \u062a\u064a\u0627\u0631 \u0627\u0644\u0635\u0648\u0627\u0639\u0642<\/li>\n<li>\u062a\u0642\u0644\u064a\u0644 \u0627\u0644\u0636\u0648\u0636\u0627\u0621 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u0629<\/li>\n<\/ul>\n<p>\u0644\u0644\u062e\u0644\u0627\u0635\u0629\u060c \u0627\u0644\u0643\u0648\u062f \u064a\u062a\u0637\u0644\u0628 25 \u0623\u0648\u0645\u061b \u0645\u0646 \u0627\u0644\u0646\u0627\u062d\u064a\u0629 \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u0629\u060c 1-5 \u0623\u0648\u0645 \u0647\u064a \u0627\u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0644\u0623\u062f\u0627\u0621 \u062c\u064a\u062f.<\/p>\n<p>&nbsp;<\/p>\n<h2>\u0627\u0644\u0645\u0645\u0627\u0631\u0633\u0629 \u0627\u0644\u0635\u0646\u0627\u0639\u064a\u0629: 5 \u0623\u0648\u0645 \u0643\u0647\u062f\u0641 \u062a\u062c\u0627\u0631\u064a<\/h2>\n<p>\u0641\u064a \u0627\u0644\u0645\u064a\u062f\u0627\u0646\u060c \u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u062a\u064a \u0645\u0646 \u0627\u0644\u0645\u0631\u062c\u062d \u0623\u0646 \u064a\u0633\u0645\u0639\u0647\u0627 \u0645\u0639\u0638\u0645 \u0627\u0644\u0646\u0627\u0633 \u0644\u0644\u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629 \u0647\u064a \u201c5 \u0623\u0648\u0645 \u0623\u0648 \u0623\u0642\u0644\u201d. \u0647\u0630\u0627 \u064a\u0623\u062a\u064a \u0645\u0646 \u0645\u0635\u0627\u062f\u0631 \u0645\u062e\u062a\u0644\u0641\u0629 \u0648\u0644\u0643\u0646\u0647\u0627 \u0645\u0643\u0645\u0644\u0629\u060c \u0645\u062b\u0644:<\/p>\n<ul>\n<li>\u062a\u0648\u0635\u064a\u0627\u062a NFPA \u0648 IEEE \u0644\u0640 5.0 \u0623\u0648\u0645 \u0623\u0648 \u0623\u0642\u0644 \u0643\u0647\u062f\u0641 \u062c\u064a\u062f<\/li>\n<li>\u0627\u0644\u0646\u0647\u062c \u0641\u064a \u0627\u0644\u0627\u062a\u0635\u0627\u0644\u0627\u062a (5 \u0623\u0648\u0645 \u0623\u0648 \u0623\u0642\u0644 \u0644\u0644\u062a\u0623\u0631\u064a\u0636 \u0648\u0627\u0644\u0631\u0628\u0637)<\/li>\n<li>\u0645\u0639\u0627\u064a\u064a\u0631 NETA \u0644\u0627\u062e\u062a\u0628\u0627\u0631\u0627\u062a \u0627\u0644\u0642\u0628\u0648\u0644 (\u22645 \u0623\u0648\u0645 \u0644\u0644\u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629\/\u0627\u0644\u0635\u0646\u0627\u0639\u064a\u0629\u061b \u22641 \u0623\u0648\u0645 \u0644\u0645\u062d\u0637\u0627\u062a \u0627\u0644\u0637\u0627\u0642\u0629\/\u0645\u062d\u0637\u0627\u062a \u0627\u0644\u0646\u0642\u0644)<\/li>\n<li>\u0627\u0644\u0623\u0631\u0642\u0627\u0645 \u0627\u0644\u0645\u0642\u062f\u0645\u0629 \u0645\u0646 \u0642\u0628\u0644 \u0645\u062e\u062a\u0644\u0641 \u0645\u0635\u0646\u0639\u064a \u0627\u0644\u0645\u0639\u062f\u0627\u062a (\u0645\u0646 1 \u0625\u0644\u0649 5 \u0623\u0648\u0645 \u0644\u0644\u0625\u0644\u0643\u062a\u0631\u0648\u0646\u064a\u0627\u062a \u0627\u0644\u062d\u0633\u0627\u0633\u0629)<\/li>\n<\/ul>\n<p>\u0648\u0641\u0642\u064b\u0627 \u0644\u0644\u062a\u0648\u0635\u064a\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629 \u0644\u0645\u0647\u0646\u062f\u0633\u064a\u0646 \u0648\u0645\u062e\u062a\u0628\u0631\u064a\u0646 \u0645\u062e\u062a\u0644\u0641\u064a\u0646\u060c \u0641\u0625\u0646 5 \u0623\u0648\u0645 \u0623\u0648 \u0623\u0642\u0644 \u062c\u064a\u062f\u0629 \u0644\u0644\u0645\u0628\u0627\u0646\u064a \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629\u060c \u0628\u064a\u0646\u0645\u0627 \u0627\u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u0645\u062a\u0648\u0633\u0637\u0629 \u0644\u0644\u0645\u062d\u0637\u0627\u062a \u0627\u0644\u0641\u0631\u0639\u064a\u0629 \u0647\u064a 1 \u0623\u0648\u0645 \u0648\u0623\u0642\u0644. \u0647\u0630\u0627 \u0644\u064a\u0633 \u0645\u0637\u0644\u0628\u064b\u0627 \u0645\u0646 NEC\u060c \u0648\u0644\u0643\u0646\u0647 \u0623\u0641\u0636\u0644 \u0627\u0644\u0645\u0645\u0627\u0631\u0633\u0627\u062a \u0627\u0644\u062a\u064a \u064a\u062a\u0628\u0639\u0647\u0627 \u0627\u0644\u0639\u062f\u064a\u062f \u0645\u0646 \u0627\u0644\u0645\u0635\u0645\u0645\u064a\u0646 \u0648\u0627\u0644\u062a\u064a \u062a\u062e\u0636\u0639 \u0644\u0644\u0627\u062e\u062a\u0628\u0627\u0631.<\/p>\n<h2>\u0647\u0644 \u0647\u0646\u0627\u0643 \u0646\u0637\u0627\u0642 \u0622\u0645\u0646\u061f \u0641\u0647\u0645 \u0627\u0644\u0623\u0631\u0642\u0627\u0645<\/h2>\n<p>\u0625\u0644\u064a\u0643 \u0643\u064a\u0641\u064a\u0629 \u062a\u0641\u0633\u064a\u0631 \u0642\u0631\u0627\u0621\u0627\u062a \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0623\u0631\u0636 \u0641\u064a \u0627\u0644\u0645\u0645\u0627\u0631\u0633\u0629:<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3703\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/08\/Is-There-a-Safe-Range.webp\" alt=\"\u0647\u0644 \u0647\u0646\u0627\u0643 \u0646\u0637\u0627\u0642 \u0622\u0645\u0646\u061f \u0641\u0647\u0645 \u0627\u0644\u0623\u0631\u0642\u0627\u0645\" width=\"1448\" height=\"1086\" \/><\/p>\n<table>\n<thead>\n<tr>\n<th>\u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629<\/th>\n<th>\u0627\u0644\u062a\u0641\u0633\u064a\u0631<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>&lt; 1 \u0623\u0648\u0645<\/td>\n<td>\u0645\u0645\u062a\u0627\u0632 \u2014 \u0646\u0645\u0648\u0630\u062c\u064a \u0644\u0644\u0634\u0628\u0643\u0627\u062a \u0627\u0644\u0643\u0628\u064a\u0631\u0629\u060c \u0627\u0644\u0645\u062d\u0637\u0627\u062a \u0627\u0644\u0641\u0631\u0639\u064a\u0629\u060c \u0627\u0644\u0623\u0642\u0637\u0627\u0628 \u0639\u0627\u0644\u064a\u0629 \u0627\u0644\u0643\u062b\u0627\u0641\u0629<\/td>\n<\/tr>\n<tr>\n<td>1\u20135 \u0623\u0648\u0645<\/td>\n<td>\u062c\u064a\u062f \u2014 \u0627\u0644\u0646\u0637\u0627\u0642 \u0627\u0644\u0645\u0648\u0635\u0649 \u0628\u0647 \u0644\u0644\u0645\u0634\u0627\u0631\u064a\u0639 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629\/\u0627\u0644\u0635\u0646\u0627\u0639\u064a\u0629 (IEEE 142)<\/td>\n<\/tr>\n<tr>\n<td>5\u201310 \u0623\u0648\u0645<\/td>\n<td>\u0645\u0642\u0628\u0648\u0644 \u0644\u0644\u0639\u062f\u064a\u062f \u0645\u0646 \u0627\u0644\u062a\u0631\u0643\u064a\u0628\u0627\u062a\u060c \u0648\u0644\u0643\u0646 \u064a\u0633\u062a\u062d\u0642 \u0627\u0644\u062a\u062d\u0633\u064a\u0646 \u0644\u0644\u0623\u062d\u0645\u0627\u0644 \u0627\u0644\u062d\u0633\u0627\u0633\u0629<\/td>\n<\/tr>\n<tr>\n<td>10\u201325 \u0623\u0648\u0645<\/td>\n<td>\u064a\u0641\u064a \u0628\u0639\u062a\u0628\u0629 NEC \u0644\u0644\u0623\u0642\u0637\u0627\u0628 \u0627\u0644\u0645\u0641\u0631\u062f\u0629 \u0648\u0644\u0643\u0646\u0647 \u0647\u0627\u0645\u0634\u064a \u0644\u0644\u0625\u0644\u0643\u062a\u0631\u0648\u0646\u064a\u0627\u062a \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629\u061b \u064a\u062c\u0628 \u0627\u0644\u062a\u062d\u0642\u064a\u0642<\/td>\n<\/tr>\n<tr>\n<td>25\u2013100 \u0623\u0648\u0645<\/td>\n<td>\u0636\u0639\u064a\u0641 \u2014 \u0641\u0648\u0642 \u062d\u062f NEC \u0644\u0644\u0623\u0642\u0637\u0627\u0628 \u0627\u0644\u0645\u0641\u0631\u062f\u0629\u061b \u0645\u0646 \u0627\u0644\u0645\u062d\u062a\u0645\u0644 \u0623\u0646 \u064a\u062d\u062a\u0627\u062c \u0625\u0644\u0649 \u0623\u0642\u0637\u0627\u0628 \u0645\u062a\u0639\u062f\u062f\u0629 \u0623\u0648 \u0645\u0639\u0627\u0644\u062c\u0629<\/td>\n<\/tr>\n<tr>\n<td>&gt; 100 \u0623\u0648\u0645<\/td>\n<td>\u0636\u0639\u064a\u0641 \u062c\u062f\u0627\u064b \u2014 \u063a\u064a\u0631 \u0645\u0642\u0628\u0648\u0644 \u0644\u0623\u064a \u062a\u0631\u0643\u064a\u0628 \u062f\u0627\u0626\u0645\u061b \u0645\u0637\u0644\u0648\u0628 \u0625\u0639\u0627\u062f\u0629 \u0627\u0644\u0639\u0645\u0644<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0627\u0644\u062a\u062d\u0630\u064a\u0631 \u0627\u0644\u0631\u0626\u064a\u0633\u064a \u0643\u0645\u0627 \u064a\u0644\u064a: \u0644\u0627 \u062a\u0648\u062c\u062f \u0642\u064a\u0645\u0629 \u201c\u0622\u0645\u0646\u0629\u201d \u0648\u0627\u062d\u062f\u0629 \u0639\u0627\u0644\u0645\u064a\u0629 \u062a\u0646\u0637\u0628\u0642 \u0639\u0644\u0649 \u0643\u0644 \u062d\u0627\u0644\u0629 \u0645\u0646 \u0645\u0646\u0638\u0648\u0631 \u0627\u0644\u0633\u0644\u0627\u0645\u0629 \u2014 \u0641\u0647\u064a \u062a\u062a\u0623\u062b\u0631 \u0623\u064a\u0636\u0627\u064b \u0628\u0639\u0648\u0627\u0645\u0644 \u0645\u062e\u062a\u0644\u0641\u0629 \u0645\u062b\u0644 \u062a\u064a\u0627\u0631 \u062e\u0637\u0623 \u0627\u0644\u0623\u0631\u0636\u060c \u0638\u0631\u0648\u0641 \u0627\u0644\u062a\u0631\u0628\u0629 \u0648\u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0627\u0644\u0641\u0639\u0644\u064a\u0629. \u062c\u0648\u062f\u0629 \u0645\u0642\u0627\u0648\u0645\u0629 \u062a\u0623\u0631\u064a\u0636 \u0627\u0644\u0642\u0637\u0628 \u0647\u064a \u062c\u0632\u0621 \u0641\u0642\u0637 \u0645\u0646 \u0627\u0644\u0645\u0634\u0643\u0644\u0629\u061b \u0633\u0644\u0627\u0645\u0629 \u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0628\u0623\u0643\u0645\u0644\u0647 \u0644\u0627 \u062a\u0642\u0644 \u0623\u0647\u0645\u064a\u0629. \u0642\u0637\u0628 \u0645\u062b\u0627\u0644\u064a \u0628\u0645\u0642\u0627\u0648\u0645\u0629 2 \u0623\u0648\u0645 \u0644\u0627 \u0641\u0627\u0626\u062f\u0629 \u0645\u0646\u0647 \u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0645\u0648\u0635\u0644\u0627\u062a \u0627\u0644\u0623\u0631\u0636 \u0644\u0644\u0623\u062c\u0647\u0632\u0629 \u0645\u0644\u062a\u0648\u064a\u0629 \u0623\u0648 \u0645\u062a\u0622\u0643\u0644\u0629.<\/p>\n<h2 id=\"is-20-ohms\">\u0647\u0644 20 \u0623\u0648\u0645 \u0633\u064a\u0626\u0629\u061f \u062a\u0641\u0633\u064a\u0631 \u0642\u064a\u0627\u0633\u0643<\/h2>\n<p>\u0645\u0633\u062a\u0648\u064a\u0627\u062a \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 20 \u0623\u0648\u0645 \u0644\u0627 \u062a\u064f\u0639\u062a\u0628\u0631 \u0625\u064a\u062c\u0627\u0628\u064a\u0629 \u0641\u064a \u0643\u0648\u062f \u0628\u0646\u0627\u0621 \u0627\u0644\u0645\u0628\u0627\u0646\u064a \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629\u060c \u0648\u0644\u0643\u0646 \u0644\u0627 \u062a\u0648\u062c\u062f \u0623\u064a\u0636\u0627\u064b \u0645\u062e\u0627\u0644\u0641\u0627\u062a \u0643\u0648\u062f\u064a\u0629 \u0645\u0631\u062a\u0628\u0637\u0629 \u0628\u0647\u0630\u0647 \u0627\u0644\u0642\u064a\u0645\u0629\u060c \u0644\u0630\u0627:<\/p>\n<ul>\n<li>\u0645\u0639\u064a\u0627\u0631 NEC: \u0647\u0630\u0627 \u0627\u0644\u0645\u0633\u062a\u0648\u0649 \u0623\u0642\u0644 \u0645\u0646 \u0627\u0644\u062d\u062f \u0627\u0644\u0623\u0642\u0635\u0649 \u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u0642\u0637\u0628 \u0627\u0644\u0645\u0641\u0631\u062f \u0627\u0644\u0645\u062d\u062f\u062f\u0629 \u0641\u064a \u0627\u0644\u062a\u0634\u0631\u064a\u0639 \u0623\u0639\u0644\u0627\u0647. \u0648\u0645\u0639 \u0630\u0644\u0643\u060c \u0645\u0633\u062a\u0648\u0649 \u0645\u0642\u0627\u0648\u0645\u0629 20 \u0623\u0648\u0645 \u0644\u0627 \u064a\u0632\u0627\u0644 \u0642\u0631\u064a\u0628\u0627\u064b \u0645\u0646 \u062a\u062c\u0627\u0648\u0632 \u0627\u0644\u0645\u0639\u0627\u064a\u064a\u0631\u060c \u0627\u0639\u062a\u0645\u0627\u062f\u0627\u064b \u0639\u0644\u0649 \u0627\u0644\u0632\u064a\u0627\u062f\u0629 \u0627\u0644\u0645\u0648\u0633\u0645\u064a\u0629 \u0648\u0627\u0644\u0627\u0646\u062e\u0641\u0627\u0636 \u0641\u064a \u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0631\u0637\u0648\u0628\u0629 \u0641\u064a \u0627\u0644\u062a\u0631\u0628\u0629.<\/li>\n<li>\u0645\u0639\u064a\u0627\u0631 IEEE 142: \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0647\u0630\u0627 \u0627\u0644\u0645\u0639\u064a\u0627\u0631\u060c \u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 20 \u0623\u0648\u0645 \u064a\u062a\u062c\u0627\u0648\u0632 \u0627\u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u0645\u0648\u0635\u0649 \u0628\u0647\u0627 1-5 \u0623\u0648\u0645\u060c \u0645\u0645\u0627 \u064a\u0639\u0646\u064a \u0623\u0646 \u0628\u0639\u0636 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0625\u0644\u0643\u062a\u0631\u0648\u0646\u064a\u0629\u060c \u0645\u062b\u0644 \u062a\u0644\u0643 \u0627\u0644\u062a\u064a \u062a\u0645\u0646\u0639 \u0639\u0645\u0644\u064a\u0627\u062a \u0627\u0644\u0627\u0646\u062f\u0641\u0627\u0639\u060c \u0642\u062f \u062a\u062a\u0636\u0631\u0631 \u0628\u0633\u0628\u0628 \u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u063a\u064a\u0631 \u0627\u0644\u0645\u0646\u0627\u0633\u0628.<\/li>\n<\/ul>\n<p>\u0645\u0646 \u0627\u0644\u0646\u0627\u062d\u064a\u0629 \u0627\u0644\u0639\u0645\u0644\u064a\u0629\u060c \u0633\u062a\u062a\u0623\u0643\u062f \u0623\u064a \u0645\u0646\u0638\u0645\u0629 \u062a\u062c\u0627\u0631\u064a\u0629 \u0645\u0646 \u0623\u0646 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u064a\u0641\u064a \u0628\u0627\u0644\u0645\u0639\u0627\u064a\u064a\u0631 \u0627\u0644\u0645\u062d\u062f\u062f\u0629.<\/p>\n<p>\u0627\u0644\u062e\u0644\u0627\u0635\u0629: \u0628\u0634\u0643\u0644 \u0639\u0627\u0645\u060c \u0642\u062f \u0644\u0627 \u062a\u0647\u062f\u062f \u0645\u0642\u0627\u0648\u0645\u0629 20 \u0623\u0648\u0645 \u062d\u064a\u0627\u0629 \u0627\u0644\u0645\u0628\u0646\u0649\u060c \u0644\u0643\u0646\u0647\u0627 \u0644\u0627 \u062a\u0632\u0627\u0644 \u0645\u0631\u062a\u0641\u0639\u0629 \u062c\u062f\u0627\u064b \u0644\u0645\u0628\u0646\u0649 \u062a\u062c\u0627\u0631\u064a\u061b \u0644\u0630\u0644\u0643\u060c \u064a\u062c\u0628 \u062a\u062d\u0633\u064a\u0646\u0647\u0627.<\/p>\n<h2>\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u062a\u062c\u0627\u0631\u064a\u0629 \u0623\u062e\u0631\u0649: \u0627\u0644\u0645\u0642\u0627\u0628\u0633 \u0648\u0627\u0644\u062a\u0648\u0635\u064a\u0644 \u0627\u0644\u0623\u0631\u0636\u064a<\/h2>\n<p>\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0623\u0631\u0636 \u062c\u0632\u0621 \u0645\u0646 \u0627\u0644\u0633\u0644\u0627\u0645\u0629 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u0629 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629. \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0643\u0648\u062f \u0627\u0644\u0648\u0637\u0646\u064a \u0644\u0644\u0643\u0647\u0631\u0628\u0627\u0621 (NEC) \u0643\u0645\u0627 \u064a\u0644\u064a:<\/p>\n<ul>\n<li>\u062e\u0635\u0627\u0626\u0635 \u0627\u0644\u0645\u0642\u0627\u0628\u0633 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629 (NEC 406\u060c 210.52\u060c 210.8): \u064a\u062c\u0628 \u062a\u062d\u062f\u064a\u062f \u0627\u0644\u0645\u0642\u0627\u0628\u0633 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629 \u0644\u062a\u0643\u0648\u0646 125 \u0641\u0648\u0644\u062a\u060c 15 \u0623\u0645\u0628\u064a\u0631 \u0648\/\u0623\u0648 20 \u0623\u0645\u0628\u064a\u0631\u060c \u064a\u062c\u0628 \u062a\u0648\u0641\u064a\u0631 \u062d\u0645\u0627\u064a\u0629 GFCI \u0641\u064a \u0645\u0648\u0627\u0642\u0639 \u0645\u0639\u064a\u0646\u0629 (\u0627\u0644\u062d\u0645\u0627\u0645\u0627\u062a\u060c \u0627\u0644\u0623\u0633\u0637\u062d\u060c \u0627\u0644\u0645\u0637\u0627\u0628\u062e\u060c \u0627\u0644\u0645\u0648\u0627\u0642\u0639 \u0627\u0644\u062e\u0627\u0631\u062c\u064a\u0629 \u0625\u0644\u062e \u062d\u0633\u0628 210.8(B))\u060c \u062c\u0645\u064a\u0639 \u0627\u0644\u0645\u0642\u0627\u0628\u0633 \u0633\u062a\u062a\u0635\u0644 \u0628\u0627\u0644\u0635\u0646\u062f\u0648\u0642 \u0627\u0644\u0645\u0639\u062f\u0646\u064a \u0648\u064a\u062c\u0628 \u0627\u0644\u062a\u0623\u0643\u062f \u0645\u0646 \u062a\u0648\u0635\u064a\u0644 \u0643\u0644 \u0645\u0642\u0628\u0633 \u0628\u0645\u0648\u0635\u0644 \u0627\u0644\u062a\u0623\u0631\u064a\u0636.<\/li>\n<li>\u0639\u0645\u0644\u064a\u0629 \u0627\u0644\u0631\u0628\u0637 (NEC 250.102-250.104): \u0645\u0646 \u0627\u0644\u0636\u0631\u0648\u0631\u064a \u0641\u0647\u0645 \u0623\u0646 \u062c\u0645\u064a\u0639 \u0627\u0644\u0623\u062c\u0632\u0627\u0621 \u0627\u0644\u0645\u0639\u062f\u0646\u064a\u0629 \u0627\u0644\u062a\u064a \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0635\u0628\u062d \u0645\u0643\u0647\u0631\u0628\u0629 \u0645\u062b\u0644 \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628\u060c \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u0624\u0637\u0631\u0629\u060c \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0647\u064a\u0643\u0644\u064a\u060c \u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0636\u062e \u064a\u062c\u0628 \u0631\u0628\u0637\u0647\u0627 \u0628\u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0623\u0631\u064a\u0636. \u0645\u0646 \u0627\u0644\u062c\u062f\u064a\u0631 \u0628\u0627\u0644\u0630\u0643\u0631 \u0623\u0646 \u0627\u062e\u062a\u0628\u0627\u0631 \u0627\u0633\u062a\u0645\u0631\u0627\u0631\u064a\u0629 \u0627\u0644\u0631\u0628\u0637 \u0633\u064a\u062a\u0645 \u0628\u0634\u0643\u0644 \u0645\u0646\u0641\u0635\u0644 \u0639\u0646 \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0642\u0637\u0628 (\u064a\u062c\u0628 \u0623\u0644\u0627 \u062a\u062a\u062c\u0627\u0648\u0632 \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0646\u0642\u0637\u0629 \u0625\u0644\u0649 \u0627\u0644\u0646\u0642\u0637\u0629 0.5 \u0623\u0648\u0645 \u0639\u0646\u062f \u062a\u0648\u0635\u064a\u0644 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0628\u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0623\u0631\u064a\u0636).<\/li>\n<li>\u0645\u0648\u0635\u0644 \u0642\u0637\u0628 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 (NEC 250.66): \u064a\u062c\u0628 \u062a\u062d\u062f\u064a\u062f \u062d\u062c\u0645 \u0623\u0642\u0637\u0627\u0628 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0648\u0641\u0642\u064b\u0627 \u0644\u0644\u062e\u062f\u0645\u0629 \u0628\u062d\u064a\u062b \u0644\u0627 \u062a\u062a\u062c\u0627\u0648\u0632 \u0627\u0644\u0642\u0637\u0631 \u0627\u0644\u0623\u0642\u0635\u0649 \u0648\u064a\u062c\u0628 \u062a\u0648\u0635\u064a\u0644 \u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0628\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u062e\u062f\u0645\u0629.<\/li>\n<\/ul>\n<p>\u0625\u0630\u0627 \u0643\u0646\u062a \u062a\u062a\u062d\u0642\u0642 \u0623\u064a\u0636\u064b\u0627 \u0645\u0646 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0648\u0642\u0627\u0626\u064a\u0629 \u0639\u0644\u0649 \u0627\u0644\u062f\u0627\u0626\u0631\u0629\u060c \u0641\u0625\u0646 \u0634\u0631\u062d\u0646\u0627 \u0644\u0640 <a href=\"https:\/\/huyuglobal.com\/ar\/blog\/circuit-breaker-and-ground-fault-circuit-interrupter\/\" rel=\"nofollow\">\u0642\u0648\u0627\u0637\u0639 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0645\u0642\u0627\u0628\u0644 \u0642\u0648\u0627\u0637\u0639 \u062f\u0627\u0626\u0631\u0629 \u0627\u0644\u062e\u0637\u0623 \u0627\u0644\u0623\u0631\u0636\u064a<\/a> \u064a\u0648\u0636\u062d \u0623\u064a \u062d\u0645\u0627\u064a\u0629 \u062a\u0642\u0648\u0645 \u0628\u0623\u064a \u0648\u0638\u064a\u0641\u0629 \u0641\u064a \u0644\u0648\u062d\u0629 \u062a\u062c\u0627\u0631\u064a\u0629.<\/p>\n<h2>\u0645\u0627 \u0627\u0644\u0630\u064a \u064a\u064f\u0639\u062a\u0628\u0631 \u0645\u0642\u0627\u0648\u0645\u0629 \u0643\u0647\u0631\u0628\u0627\u0626\u064a\u0629 \u0639\u0627\u0644\u064a\u0629\u061f<\/h2>\n<p>\u064a\u0644\u0639\u0628 \u0627\u0644\u0633\u064a\u0627\u0642 \u062f\u0648\u0631\u064b\u0627 \u0641\u064a \u0645\u0639\u0646\u0649 \u201c\u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0639\u0627\u0644\u064a\u0629\u201d:<\/p>\n<ul>\n<li>\u0639\u0646\u062f \u0642\u064a\u0627\u0633 \u0623\u0642\u0637\u0627\u0628 \u0627\u0644\u062a\u0623\u0631\u064a\u0636\u060c \u064a\u0639\u0646\u064a \u0630\u0644\u0643 \u0642\u064a\u0645\u0629 \u0623\u0643\u0628\u0631 \u0645\u0646 \u062d\u0648\u0627\u0644\u064a 25 \u0623\u0648\u0645 (\u0639\u0644\u0649 \u0633\u0628\u064a\u0644 \u0627\u0644\u0645\u062b\u0627\u0644\u060c 100 \u0623\u0648\u0645 \u0623\u0648 \u0623\u0643\u062b\u0631 \u0647\u0648 \u0642\u064a\u0645\u0629 \u0639\u0627\u0644\u064a\u0629 \u062c\u062f\u064b\u0627). \u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u201c\u0627\u0644\u0645\u062b\u0627\u0644\u064a\u201d \u0647\u0648 1-5 \u0623\u0648\u0645.<\/li>\n<li>\u0645\u0646 \u062d\u064a\u062b \u0627\u0633\u062a\u0645\u0631\u0627\u0631\u064a\u0629 \u0627\u0644\u062a\u0623\u0631\u064a\u0636\u060c \u0623\u064a \u0642\u064a\u0645\u0629 \u062a\u0632\u064a\u062f \u0639\u0646 0.5 \u0623\u0648\u0645 \u062a\u0634\u064a\u0631 \u0625\u0644\u0649 \u0648\u062c\u0648\u062f \u062e\u0644\u0644. \u064a\u062c\u0628 \u0623\u0646 \u064a\u0643\u0648\u0646 \u0627\u0644\u0627\u062a\u0635\u0627\u0644 \u0628\u064a\u0646 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0648\u0627\u0644\u0623\u0631\u0636 \u0642\u0631\u064a\u0628\u064b\u0627 \u0645\u0646 \u0627\u0644\u0635\u0641\u0631.<\/li>\n<li>\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0639\u0632\u0644\u060c \u062a\u0639\u0646\u064a \u0642\u064a\u0645\u0629 \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0639\u0627\u0644\u064a\u0629 \u0645\u0642\u0627\u0648\u0645\u0629 \u062c\u064a\u062f\u0629 \u0644\u0623\u0646\u0647\u0627 \u062a\u0642\u0627\u0633 \u0628\u0627\u0644\u0645\u064a\u063a\u0627 \u0648\u0627\u0644\u0623\u063a\u0648\u0647\u0645 \u062d\u064a\u062b \u062a\u0634\u064a\u0631 \u0623\u064a \u0642\u064a\u0645\u0629 \u0623\u0642\u0644 \u0645\u0646 1 \u0645\u064a\u063a\u0627 \u0623\u0648\u0645 \u0625\u0644\u0649 \u0627\u062d\u062a\u0645\u0627\u0644 \u0639\u0627\u0644\u064a \u0644\u0644\u0627\u0646\u0647\u064a\u0627\u0631.<\/li>\n<\/ul>\n<p>\u0641\u064a \u0627\u0644\u062e\u062a\u0627\u0645\u060c \u062a\u0639\u0646\u064a \u201c\u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0639\u0627\u0644\u064a\u0629\u201d \u063a\u0627\u0644\u0628\u064b\u0627 \u0645\u0634\u0643\u0644\u0629 (\u0644\u0644\u062a\u0623\u0631\u064a\u0636) \u0644\u0643\u0646\u0647\u0627 \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0639\u0646\u064a \u062d\u0627\u0644\u0629 \u062c\u064a\u062f\u0629 (\u0644\u0644\u0639\u0632\u0644). \u062a\u0623\u0643\u062f \u062f\u0627\u0626\u0645\u064b\u0627 \u0645\u0645\u0627 \u064a\u062a\u0645 \u0627\u0644\u062d\u062f\u064a\u062b \u0639\u0646\u0647 \u0628\u0627\u0644\u0636\u0628\u0637 \u0639\u0646\u062f \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0645\u0635\u0637\u0644\u062d \u201c\u0645\u0642\u0627\u0648\u0645\u0629 \u0639\u0627\u0644\u064a\u0629\u201d.<\/p>\n<h2>\u0627\u0644\u0639\u0648\u0627\u0645\u0644 \u0627\u0644\u062a\u064a \u062a\u0624\u062b\u0631 \u0639\u0644\u0649 \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0623\u0631\u0636<\/h2>\n<p>\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0623\u0631\u0636 \u0644\u064a\u0633\u062a \u0642\u064a\u0645\u0629 \u062b\u0627\u0628\u062a\u0629. \u062a\u062a\u063a\u064a\u0631 \u062d\u0633\u0628 \u0627\u0644\u0638\u0631\u0648\u0641:<\/p>\n<ul>\n<li>\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062a\u0631\u0628\u0629: \u0627\u0644\u0637\u064a\u0646\/\u0627\u0644\u062a\u0631\u0628\u0629 \u0627\u0644\u0637\u064a\u0646\u064a\u0629 (10\u2013100 \u03a9\u00b7\u0645) \u0644\u0647\u0627 \u0645\u0642\u0627\u0648\u0645\u0629 \u0623\u0642\u0644 \u0645\u0646 \u0627\u0644\u0631\u0645\u0644\/\u0627\u0644\u062d\u0635\u0649 (1,000\u201310,000 \u03a9\u00b7\u0645).<\/li>\n<li>\u0645\u062d\u062a\u0648\u0649 \u0627\u0644\u0631\u0637\u0648\u0628\u0629: \u0627\u0644\u062a\u0631\u0628\u0629 \u0627\u0644\u0631\u0637\u0628\u0629 \u0644\u0647\u0627 \u0645\u0642\u0627\u0648\u0645\u0629 \u0623\u0642\u0644 \u0628\u064a\u0646\u0645\u0627 \u064a\u0632\u064a\u062f \u0627\u0644\u0637\u0642\u0633 \u0627\u0644\u062c\u0627\u0641 \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0628\u0634\u0643\u0644 \u0643\u0628\u064a\u0631.<\/li>\n<li>\u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629: \u0627\u0644\u062a\u0631\u0628\u0629 \u0627\u0644\u0628\u0627\u0631\u062f\u0629 \u0644\u0647\u0627 \u0645\u0642\u0627\u0648\u0645\u0629 \u0623\u0639\u0644\u0649 \u0628\u0643\u062b\u064a\u0631.<\/li>\n<li>\u0639\u0645\u0642 \u0627\u0644\u0642\u0637\u0628 \u0648\u0627\u0644\u0645\u0642\u0637\u0639 \u0627\u0644\u0639\u0631\u0636\u064a: \u0627\u0644\u0623\u0642\u0637\u0627\u0628 \u0627\u0644\u0623\u0637\u0648\u0644 \u0648\u0627\u0644\u0623\u0644\u0648\u0627\u062d \u0627\u0644\u0623\u0643\u0628\u0631 \u062a\u063a\u0648\u0635 \u0623\u0639\u0645\u0642 \u0641\u064a \u0627\u0644\u062a\u0631\u0628\u0629.<\/li>\n<li>\u0639\u062f\u062f \u0627\u0644\u0623\u0642\u0637\u0627\u0628 \u0648\u0627\u0644\u0645\u0633\u0627\u0641\u0629 \u0628\u064a\u0646\u0647\u0627: \u0643\u0644\u0645\u0627 \u0632\u0627\u062f \u0639\u062f\u062f \u0627\u0644\u0623\u0642\u0637\u0627\u0628 \u0648\u0628\u0639\u062f\u062a \u0627\u0644\u0645\u0633\u0627\u0641\u0629 \u0628\u064a\u0646\u0647\u0627\u060c \u0627\u0646\u062e\u0641\u0636\u062a \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629.<\/li>\n<li>\u0645\u0627\u062f\u0629 \u0627\u0644\u0642\u0637\u0628 \u0648\u0627\u0644\u062a\u0622\u0643\u0644: \u0643\u0644\u0645\u0627 \u0628\u0642\u064a\u062a \u0627\u0644\u0623\u0642\u0637\u0627\u0628 \u0641\u064a \u0627\u0644\u0623\u0631\u0636 \u0644\u0641\u062a\u0631\u0629 \u0623\u0637\u0648\u0644\u060c \u0632\u0627\u062f \u0627\u0644\u062a\u0622\u0643\u0644 \u0648\u0627\u0631\u062a\u0641\u0639\u062a \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629.<\/li>\n<\/ul>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3704\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/08\/How-to-Achieve-a-Low-Resistance-Ground.webp\" alt=\"\u0643\u064a\u0641\u064a\u0629 \u062a\u062d\u0642\u064a\u0642 \u062a\u0623\u0631\u064a\u0636 \u0645\u0646\u062e\u0641\u0636 \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>\u0643\u064a\u0641\u064a\u0629 \u062a\u062d\u0642\u064a\u0642 \u062a\u0623\u0631\u064a\u0636 \u0645\u0646\u062e\u0641\u0636 \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629<\/h2>\n<p>\u0641\u064a \u062d\u0627\u0644 \u0643\u0627\u0646\u062a \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629 \u0645\u0631\u062a\u0641\u0639\u0629 \u062c\u062f\u064b\u0627\u060c \u0625\u0644\u064a\u0643 \u0642\u0627\u0626\u0645\u0629 \u0645\u0631\u062a\u0628\u0629 \u0628\u0623\u0643\u062b\u0631 \u0627\u0644\u062d\u0644\u0648\u0644 \u0641\u0639\u0627\u0644\u064a\u0629 \u0645\u0646 \u062d\u064a\u062b \u0627\u0644\u062a\u0643\u0644\u0641\u0629:<\/p>\n<ul>\n<li>\u0625\u0636\u0627\u0641\u0629 \u0642\u0636\u0628\u0627\u0646: \u0625\u0636\u0627\u0641\u0629 \u0642\u0636\u064a\u0628 \u062a\u0623\u0631\u064a\u0636 \u062b\u0627\u0646\u064a\u060c \u0645\u0648\u0636\u0648\u0639 \u0639\u0644\u0649 \u0628\u0639\u062f 8 \u0623\u0642\u062f\u0627\u0645 \u0645\u0646 \u0627\u0644\u0623\u0648\u0644\u060c \u0633\u064a\u0642\u0644\u0644 \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0628\u0634\u0643\u0644 \u0643\u0628\u064a\u0631. \u0627\u0633\u062a\u0645\u0631 \u0641\u064a \u0625\u0636\u0627\u0641\u0629 \u0642\u0636\u0628\u0627\u0646 \u0625\u0636\u0627\u0641\u064a\u0629 \u062d\u062a\u0649 \u064a\u062a\u0645 \u062a\u062d\u0642\u064a\u0642 \u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0635\u062d\u064a\u062d\u0629 (\u062a\u062a\u0646\u0627\u0642\u0635 \u0627\u0644\u0641\u0627\u0626\u062f\u0629 \u0645\u0639 \u0643\u0644 \u0642\u0636\u064a\u0628 \u0645\u0636\u0627\u0641).<\/li>\n<li>\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0642\u0636\u0628\u0627\u0646 \u0623\u0643\u0628\u0631 \u0623\u0648 \u0623\u0637\u0648\u0644: \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0642\u0636\u064a\u0628 \u0623\u0637\u0648\u0644 (10 \u0623\u0642\u062f\u0627\u0645) \u0623\u0648 \u0642\u0636\u0628\u0627\u0646 \u0633\u0645\u064a\u0643\u0629 \u0623\u0648 \u0623\u0642\u0637\u0627\u0628 \u0644\u0648\u062d\u064a\u0629 \u0633\u064a\u0633\u0627\u0639\u062f \u0641\u064a \u0627\u0644\u0648\u0635\u0648\u0644 \u0625\u0644\u0649 \u062a\u0631\u0628\u0629 \u0623\u0639\u0645\u0642 \u0648\u0623\u0642\u0644 \u0645\u0642\u0627\u0648\u0645\u0629.<\/li>\n<li>\u062a\u062d\u0633\u064a\u0646 \u0627\u062a\u0635\u0627\u0644 \u0627\u0644\u062a\u0631\u0628\u0629: \u0645\u0644\u0621 \u0627\u0644\u0641\u0631\u0627\u063a\u0627\u062a \u062d\u0648\u0644 \u0627\u0644\u0642\u0636\u064a\u0628 \u0628\u0645\u0648\u0627\u062f \u0645\u0648\u0635\u0644\u0629 \u0623\u0648 \u0625\u0636\u0627\u0641\u0627\u062a \u0643\u064a\u0645\u064a\u0627\u0626\u064a\u0629 \u0633\u064a\u062d\u0633\u0646 \u0627\u062a\u0635\u0627\u0644\u0647 \u0628\u0627\u0644\u062a\u0631\u0628\u0629.<\/li>\n<li>\u0625\u0646\u0634\u0627\u0621 \u062d\u0644\u0642\u0627\u062a \u0623\u0648 \u0634\u0628\u0643\u0629 \u062a\u0623\u0631\u064a\u0636: \u0645\u0648\u0635\u0644 \u0646\u062d\u0627\u0633\u064a \u062a\u062d\u062a \u0627\u0644\u0623\u0631\u0636 \u064a\u062d\u064a\u0637 \u0628\u0627\u0644\u0647\u064a\u0643\u0644 \u064a\u062e\u0644\u0642 \u0645\u0633\u0627\u062d\u0629 \u0627\u062a\u0635\u0627\u0644 \u0623\u0643\u0628\u0631 (\u064a\u064f\u0633\u062a\u062e\u062f\u0645 \u0647\u0630\u0627 \u0627\u0644\u062d\u0644 \u0639\u0644\u0649 \u0646\u0637\u0627\u0642 \u0648\u0627\u0633\u0639 \u0641\u064a \u0627\u0644\u0645\u062c\u0627\u0644 \u0627\u0644\u062a\u062c\u0627\u0631\u064a\/\u0627\u0644\u0635\u0646\u0627\u0639\u064a).<\/li>\n<li>\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0623\u0642\u0637\u0627\u0628 \u0645\u063a\u0637\u0627\u0629 \u0628\u0627\u0644\u062e\u0631\u0633\u0627\u0646\u0629 (\u062a\u0623\u0631\u064a\u0636 Ufer): \u064a\u0638\u0647\u0631 \u062d\u062f\u064a\u062f \u0627\u0644\u062a\u0633\u0644\u064a\u062d \u0648\u0627\u0644\u0645\u0648\u0635\u0644 \u0627\u0644\u0645\u062f\u0645\u062c\u0627\u0646 \u0641\u064a \u0627\u0644\u062e\u0631\u0633\u0627\u0646\u0629 \u062e\u0635\u0627\u0626\u0635 \u062a\u0648\u0635\u064a\u0644 \u0645\u0645\u062a\u0627\u0632\u0629 \u0648\u0645\u0648\u062b\u0648\u0642\u0629.<\/li>\n<li>Connect to the building&#8217;s steel parts and water pipe: Connecting to the metal structural steel and underground water pipes (if any) gives additional ways of conduction.<\/li>\n<\/ul>\n<p>Be sure to test every time you change the system, but keep in mind that the NEC does not require retesting the two-electrode system.<\/p>\n<h2>How Ground Resistance Is Tested<\/h2>\n<p>Ground testing is to be carried out by persons qualified for this job. The main and widespread methods are:<\/p>\n<ul>\n<li>Fall-of-Potential (more commonly known as three-point testing): The fall-of-potential method consists in the use of two temporary stakes and resistance measuring with increasing distance. It is the most precise technique used for small to medium installations.<\/li>\n<li>Clamp-on (or inductive) testing: The clamp-on method involves the clamp around the rod\/conductor so that the loop resistance can be measured without disconnecting the loop. It is advantageous for the already existing installations but requires the whole loop connected.<\/li>\n<li>Two-point testing: The two-point method is used to make fast measurements against a known reference electrode: this technique is less accurate, thus used in rough calculations.<\/li>\n<\/ul>\n<p>Testing is dangerous, since it usually requires isolation of the electrode, and fault current may be present, this job should not be done by an ordinary homeowner. For commercial buildings the commissioning and regular tests usually are performed by contractors or specialized companies in accordance with NETA standards.<\/p>\n<h2>\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/h2>\n<h3>Which guideline outlines the acceptable maximum resistance for earthing in commercial installations?<\/h3>\n<p>NEC does not specify a single standard maximum value. The 25-ohm requirement outlined in NEC 250.53 applies only to the case of a single-electrode system, and not to the whole building. A major engineering standard is IEEE Std 142 (the Green Book), which suggests that the value of the main grounding electrode in large commercial and industrial installations should be in the range of 1-5 ohms. Normally, in practice, and accepting standards set by NETA, the value of 5 ohms is satisfactory for a commercial building (1 ohm for a substation). In general, NEC shows the limit according to the requirements of the code, IEEE 142 provides the acceptable range according to the engineering requirements, and then 5 ohms emerges as the accepted practice.<\/p>\n<h3>Is 20 ohms of resistance in a ground bad?<\/h3>\n<p>A resistance of 20 ohms is not hazardous in itself but is borderline acceptable for commercial buildings. While the NEC&#8217;s single-rod criterion of 25 ohms is passed, the number is above the level recommended by IEEE 142 for commercial installations, which is 1\uff0d5 ohms, as well as the commonly accepted level of 5 ohms. With that level of grounding, the fault current is returning in a slower manner and not providing remarkable surge protection or reference grounding for sensitive electronics as well. And since it is just a step away from going above the code threshold, the level may go up as a result of soil condition changes during the seasons. Hence, the grounding system should be improved in the case of commercial installations.<\/p>\n<h3>What are the NEC commercial receptacle requirements?<\/h3>\n<p>All commercial receptacles have a voltage rating of 125 volts to 15 or 20 amps as stated in NEC 406, and their minimum amount and spacing rules can be found in 210.52 for general areas. GFCI protection is mandatory in given commercial spaces under NEC 210.8(b), such as bathrooms, kitchens, rooftops, outdoors, and garages\/service areas. All receptacles must be provided with an equipment grounding, and metallic boxes are to be grounded. In many commercial child-occupied places, tamper-resistant receptacles are a must, while some types of occupancies have their particular rules for provided receptacles.<\/p>\n<h3>What is a high electrical resistance?<\/h3>\n<p>&#8220;High electrical resistance&#8221; depends upon what measurement is at hand. With regard to grounding electrodes, anything over approximately 25 ohms counts as high, while numbers over 100 ohms are considered very high. Ideally, the resistance should be somewhere between 1 and 5 ohms. Concerning equipment grounding continuity, the electrical resistance should not exceed 0.5 ohm when measuring the equipment and the ground. In insulation, a high resistance is a positive sign. For insulation to be considered healthy, it must have a resistance of millions of ohms (M\u03a9) or even billions of ohms. A resistance level of less than 1 M\u03a9 indicates a breakdown with leakage danger.<\/p>\n<h2>\u0627\u0644\u0645\u0631\u0627\u062c\u0639<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.nfpa.org\/codes-and-standards\/all-codes-and-standards\/list-of-codes-and-standards\/detail?code=70\" rel=\"nofollow noopener\" target=\"_blank\">NFPA 70 \u2014 National Electrical Code (NEC), Article 250 (Grounding &amp; Bonding), 210.8, 406<\/a><\/li>\n<li><a href=\"https:\/\/standards.ieee.org\/ieee\/142\/4070\/\" rel=\"nofollow noopener\" target=\"_blank\">IEEE Std 142-2007 \u2014 Recommended Practice for Grounding of Industrial and Commercial Power Systems (Green Book)<\/a><\/li>\n<li><a href=\"https:\/\/standards.ieee.org\/ieee\/81\/4395\/\" rel=\"nofollow noopener\" target=\"_blank\">IEEE Std 81 \u2014 Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials<\/a><\/li>\n<li><a href=\"https:\/\/www.netaworld.org\" rel=\"nofollow noopener\" target=\"_blank\">NETA \u2014 Acceptance Testing Specifications (ATS) for electrical power equipment<\/a><\/li>\n<li><a href=\"https:\/\/www.vertiv.com\/4990c7\/globalassets\/shared\/why-test-grounding-systems.pdf\" rel=\"nofollow noopener\" target=\"_blank\">Vertiv \u2014 Why Test Grounding Systems (NEC\/IEEE 142\/80 grounding values)<\/a><\/li>\n<li><a href=\"https:\/\/www.fluke.com\" rel=\"nofollow noopener\" target=\"_blank\">Fluke \u2014 Ground resistance testing application notes<\/a><\/li>\n<\/ul>\n<h2>\u0627\u0644\u062e\u0644\u0627\u0635\u0629<\/h2>\n<p>The NEC&#8217;s two figures \u2014 25 ohms and 1-5 ohms as per the IEEE 142 guide cover the maximum allowed electrical ground resistance of a commercial building. While the NEC does not consider for a commercial building the value of under 25 ohms that would indicate compliance with the code as a performance standard, it depends on whether a single electrode is sufficient. From this standpoint, the ideal value for reliable and safe performance of commercial installation would be in the range of 1-5 ohms, as noted by IEEE, thus facilitating fast failure elimination, effective surge protection, low noise level for commercial electronics.<\/p>\n<p>Use proper fall-of-potential testing to get a good measurement and tally it against the range table (as good value is under 5, value ranging from 5 to 25 is marginal, value over 25 is below the acceptable level); you may need to add more or longer electrodes to the grounding system unless you find the readings satisfactory. Finally, do not forget that the resistance of electrodes is only half of the story and the continuity of bonding and grounding must also be accounted for.<\/p>","protected":false},"excerpt":{"rendered":"<p>A person comes to perform electrical inspection in your commercial building. The engineer informs him that the ground electrode was tested at 22 Ohms. Someone nearby says that since NEC permits 25 Ohms, everything is okay. But the equipment manufacturer&#8217;s handbook states that 5 Ohm max is needed since it works with sensitive electronics; therefore, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3701,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-3700","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/huyuglobal.com\/ar\/wp-json\/wp\/v2\/posts\/3700","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/huyuglobal.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/huyuglobal.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/ar\/wp-json\/wp\/v2\/comments?post=3700"}],"version-history":[{"count":2,"href":"https:\/\/huyuglobal.com\/ar\/wp-json\/wp\/v2\/posts\/3700\/revisions"}],"predecessor-version":[{"id":3706,"href":"https:\/\/huyuglobal.com\/ar\/wp-json\/wp\/v2\/posts\/3700\/revisions\/3706"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/ar\/wp-json\/wp\/v2\/media\/3701"}],"wp:attachment":[{"href":"https:\/\/huyuglobal.com\/ar\/wp-json\/wp\/v2\/media?parent=3700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/huyuglobal.com\/ar\/wp-json\/wp\/v2\/categories?post=3700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/huyuglobal.com\/ar\/wp-json\/wp\/v2\/tags?post=3700"}],"curies":[{"name":"\u0645\u0642\u0627\u0648\u0645\u0629 \u0644\u0644\u0645\u0627\u0621 (wp)","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}