{"id":3670,"date":"2026-08-11T15:42:23","date_gmt":"2026-08-11T15:42:23","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=3670"},"modified":"2026-08-11T15:44:53","modified_gmt":"2026-08-11T15:44:53","slug":"gfci-stands-for-ground-fault-circuit-interrupter","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/vi\/blog\/gfci-stands-for-ground-fault-circuit-interrupter\/","title":{"rendered":"GFCI Vi\u1ebft t\u1eaft c\u1ee7a Ground Fault Circuit Interrupter"},"content":{"rendered":"<p>B\u1ea1n c\u00f3 th\u1ec3 \u0111ang \u0111\u1ecdc m\u1ed9t b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, chu\u1ea9n b\u1ecb cho m\u1ed9t b\u00e0i ki\u1ec3m tra v\u1ec1 \u0111i\u1ec7n, ho\u1eb7c \u0111\u01a1n gi\u1ea3n l\u00e0 c\u1ed1 g\u1eafng t\u00ecm hi\u1ec3u c\u00e1ch c\u00e1c \u1ed5 c\u1eafm trong b\u1ebfp c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng khi b\u1ea1n b\u1eaft g\u1eb7p c\u00e2u n\u00f3i \u201cGFCI c\u00f3 ngh\u0129a l\u00e0 nhi\u1ec5u m\u1ea1ch l\u1ed7i \u0111\u1ea5t.\u201d \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 nghe \u0111\u00fang, nh\u01b0ng th\u1ef1c ra sai. GFCI th\u1ef1c s\u1ef1 c\u00f3 ngh\u0129a l\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch l\u1ed7i \u0111\u1ea5t. B\u1ea1n c\u00f3 th\u1ec3 ngh\u0129 r\u1eb1ng s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa t\u1eeb \u201cinterrupter\u201d v\u00e0 \u201cinterference\u201d ch\u1ec9 l\u00e0 v\u1ec1 ch\u00ednh t\u1ea3, nh\u01b0ng kh\u00f4ng ch\u1ec9 l\u00e0 ch\u00ednh t\u1ea3; \u0111\u00f3 l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u00fd ngh\u0129a. Trong b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd t\u00ecm th\u1ea5y c\u00e1c gi\u1ea3i th\u00edch v\u1ec1 GFCI l\u00e0 g\u00ec, t\u1ea1i sao \u201cnhi\u1ec5u m\u1ea1ch l\u1ed7i \u0111\u1ea5t\u201d l\u00e0 sai v\u00e0 c\u00e1ch GFCI ho\u1ea1t \u0111\u1ed9ng, nh\u1eefng nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 khi\u1ebfn thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch v\u00e0 nh\u1eefng g\u00ec b\u1ea1n kh\u00f4ng n\u00ean c\u1eafm v\u00e0o GFCI.<\/p>\n<blockquote><p><strong>Tr\u1ea3 l\u1eddi nhanh:<\/strong> Thu\u1eadt ng\u1eef ch\u00ednh x\u00e1c GFCI, vi\u1ebft t\u1eaft c\u1ee7a Ground Fault Circuit Interrupter, th\u01b0\u1eddng b\u1ecb hi\u1ec3u nh\u1ea7m th\u00e0nh c\u00e1c t\u00ean kh\u00e1c nh\u01b0 nhi\u1ec5u m\u1ea1ch l\u1ed7i \u0111\u1ea5t v\u00e0 m\u1ea1ch c\u1ea7u ch\u00ec l\u1edbn trong thu\u1eadt ng\u1eef \u0111i\u1ec7n. Thu\u1eadt ng\u1eef n\u00e0y ch\u1ec9 thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch \u0111i\u1ec7n khi ph\u00e1t hi\u1ec7n l\u1ed7i \u0111\u1ea5t. Theo B\u1ed9 Quy chu\u1ea9n \u0110i\u1ec7n Qu\u1ed1c gia v\u00e0 c\u00e1c m\u00e3 UL, \u00fd ngh\u0129a c\u1ee7a GFCI c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c hi\u1ec3u \u0111\u00fang theo c\u00e1ch n\u00e0y.<\/p><\/blockquote>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3671\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/08\/What-GFCI-Actually-Stands-For.webp\" alt=\"GFCI th\u1ef1c s\u1ef1 c\u00f3 ngh\u0129a l\u00e0 g\u00ec\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>GFCI th\u1ef1c s\u1ef1 c\u00f3 ngh\u0129a l\u00e0 g\u00ec<\/h2>\n<p>T\u1eeb vi\u1ebft t\u1eaft GFCI c\u00f3 ngh\u0129a l\u00e0: Ground Fault Circuit Interrupter.<\/p>\n<p>H\u00e3y xem \u0111\u1ecbnh ngh\u0129a c\u1ee7a t\u1eebng t\u1eeb:<\/p>\n<ul>\n<li><span style=\"color: #ff0000;\">L\u1ed7i \u0111\u1ea5t:<\/span> m\u1ed9t d\u00f2ng \u0111i\u1ec7n kh\u00f4ng ch\u1ee7 \u00fd gi\u1eefa d\u00e2y n\u00f3ng v\u00e0 \u0111\u1ea5t (v\u00ed d\u1ee5: qua ng\u01b0\u1eddi, qua n\u01b0\u1edbc, qua d\u00e2y b\u1ecb \u0111\u1ee9t ho\u1eb7c qua v\u1ecf thi\u1ebft b\u1ecb).<\/li>\n<li><span style=\"color: #ff0000;\">M\u1ea1ch:<\/span> \u0111\u01b0\u1eddng d\u1eabn \u0111i\u1ec7n l\u00e0m cho d\u00f2ng \u0111i\u1ec7n ch\u1ea3y t\u1eeb N \u0111\u1ebfn L theo m\u1ed9t v\u00f2ng k\u00edn.<\/li>\n<li><span style=\"color: #ff0000;\">B\u1ed9 ng\u1eaft:<\/span> m\u1ed9t thi\u1ebft b\u1ecb t\u1ea1o ra s\u1ef1 ng\u1eaft m\u1ea1ch khi x\u1ea3y ra l\u1ed7i \u0111\u1ea5t.<\/li>\n<\/ul>\n<p>\u0110\u00e2y kh\u00f4ng ch\u1ec9 l\u00e0 \u00fd ki\u1ebfn c\u00e1 nh\u00e2n. N\u00f3 \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong B\u1ed9 Quy chu\u1ea9n \u0110i\u1ec7n Qu\u1ed1c gia (NFPA 70), n\u01a1i thu\u1eadt ng\u1eef \u201cground-fault circuit-interrupter\u201d \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0110i\u1ec1u 210.8 v\u00e0 c\u00e1c \u0111i\u1ec1u kho\u1ea3n li\u00ean quan kh\u00e1c. N\u00f3 c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong UL 943, ti\u00eau chu\u1ea9n an to\u00e0n cho GFCI. H\u01a1n n\u1eefa, t\u1ea5t c\u1ea3 c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh \u0111\u00e0o t\u1ea1o \u0111i\u1ec7n, t\u00e0i li\u1ec7u c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t (v\u00ed d\u1ee5: Leviton, Eaton, Legrand) v\u00e0 b\u00e1o c\u00e1o ki\u1ec3m tra \u0111\u1ec1u s\u1eed d\u1ee5ng thu\u1eadt ng\u1eef \u2019interrupter.\u201c<\/p>\n<hr \/>\n<h2 id=\"why-interference-wrong\">T\u1ea1i sao \u201cNhi\u1ec5u M\u1ea1ch L\u1ed7i \u0110\u1ea5t\u201d l\u00e0 sai<\/h2>\n<p>Thu\u1eadt ng\u1eef \u201cinterference\u201d ng\u1ee5 \u00fd s\u1ef1 gi\u00e1n \u0111o\u1ea1n, c\u1ea3n tr\u1edf ho\u1eb7c nhi\u1ec5u lo\u1ea1n m\u1ea1ch b\u1edfi thi\u1ebft b\u1ecb, gi\u1ed1ng nh\u01b0 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI). \u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a GFCI. GFCI kh\u00f4ng g\u00e2y nhi\u1ec5u cho ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a m\u1ea1ch v\u00ec n\u00f3 ho\u1ea1t \u0111\u1ed9ng \u00e2m th\u1ea7m v\u00e0 g\u1ea7n nh\u01b0 v\u00f4 h\u00ecnh trong m\u1ea1ch, cho ph\u00e9p d\u00f2ng \u0111i\u1ec7n ch\u1ea3y qua nh\u01b0 b\u00ecnh th\u01b0\u1eddng. Ch\u1ee9c n\u0103ng duy nh\u1ea5t c\u1ee7a n\u00f3 l\u00e0 ng\u1eaft d\u00f2ng \u0111i\u1ec7n ngay khi ph\u00e1t hi\u1ec7n l\u1ed7i \u0111\u1ea5t. Do \u0111\u00f3, n\u00f3 ho\u00e0n to\u00e0n kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 nhi\u1ec5u lo\u1ea1n.<\/p>\n<p>Nh\u01b0ng s\u1ef1 nh\u1ea7m l\u1eabn n\u00e0y xu\u1ea5t ph\u00e1t t\u1eeb \u0111\u00e2u? D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 gi\u1ea3i th\u00edch:<\/p>\n<ul>\n<li><span style=\"color: #ff0000;\">\u00c2m thanh:<\/span> c\u00e1c t\u1eeb \u201cinterrupter\u201d v\u00e0 \u201cinterference\u201d b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00f9ng c\u00e1c ch\u1eef c\u00e1i v\u00e0 c\u00f3 \u00e2m thanh kh\u00e1 gi\u1ed1ng nhau, d\u1eabn \u0111\u1ebfn s\u1ef1 nh\u1ea7m l\u1eabn.<\/li>\n<li><span style=\"color: #ff0000;\">T\u1ef1 \u0111\u1ed9ng ho\u00e0n th\u00e0nh:<\/span> c\u00e1c c\u00f4ng c\u1ee5 ki\u1ec3m tra ch\u00ednh t\u1ea3 v\u00e0 AI \u0111\u00f4i khi thay th\u1ebf \u201cinterference\u201d b\u1eb1ng t\u1eeb \u0111\u00f3 v\u00ec n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn h\u01a1n.<\/li>\n<li><span style=\"color: #ff0000;\">Nh\u1ea7m l\u1eabn v\u1edbi EMI:<\/span> m\u1ecdi ng\u01b0\u1eddi th\u01b0\u1eddng nh\u1ea7m \u201cinterference\u201d v\u1edbi \u201cnhi\u1ec5u \u0111i\u1ec7n t\u1eeb\u201d (EMI).<\/li>\n<\/ul>\n<p>T\u1eeb ch\u00ednh x\u00e1c, \u0111\u01b0\u1ee3c x\u00e1c minh theo NEC v\u00e0 UL, l\u00e0 interrupter, v\u00e0 GFCIs kh\u00f4ng th\u1ec3 c\u00f3 ngh\u0129a l\u00e0 \u201cground fault circuit interference.\u201d M\u1ed9t v\u00ed d\u1ee5 v\u1ec1 l\u1ed7i \u0111\u00f3 l\u00e0 GFCI \u0111\u01b0\u1ee3c vi\u1ebft v\u1edbi ngh\u0129a \u201cground fault circuit interference\u201d.<\/p>\n<hr \/>\n<h2>GFCI l\u00e0 g\u00ec v\u00e0 n\u00f3 l\u00e0m g\u00ec?<\/h2>\n<p>Thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch l\u1ed7i \u0111i\u1ec7n l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ph\u00f2ng ng\u1eeba ho\u1ea1t \u0111\u1ed9ng nhanh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e1 nh\u00e2n kh\u1ecfi nguy c\u01a1 \u0111i\u1ec7n gi\u1eadt. Thi\u1ebft b\u1ecb so s\u00e1nh d\u00f2ng \u0111i\u1ec7n trong ngu\u1ed3n \u0111ang ch\u1ea3y qua d\u00e2y n\u00f3ng v\u1edbi d\u00f2ng \u0111i\u1ec7n trong d\u00e2y trung t\u00ednh. Th\u00f4ng th\u01b0\u1eddng, c\u00e1c d\u00f2ng \u0111i\u1ec7n n\u00e0y b\u1eb1ng nhau. Tuy nhi\u00ean, khi m\u1ed9t ph\u1ea7n d\u00f2ng \u0111i\u1ec7n b\u1ecb m\u1ea5t qua \u0111\u1ea5t nh\u01b0 khi tay \u01b0\u1edbt ch\u1ea1m v\u00e0o thi\u1ebft b\u1ecb, l\u00e0m r\u01a1i m\u00e1y s\u1ea5y t\u00f3c v\u00e0o n\u01b0\u1edbc, ho\u1eb7c d\u00e2y b\u1ecb h\u1ecfng. GFCI c\u1ea3m nh\u1eadn s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n v\u00e0 ng\u1eaft d\u00f2ng \u0111i\u1ec7n trong t\u1ed1i \u0111a 1\/40 gi\u00e2y.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3672\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/08\/What-Is-a-GFCI-and-What-Does-It-Do.webp\" alt=\"GFCI l\u00e0 g\u00ec v\u00e0 n\u00f3 l\u00e0m g\u00ec?\" width=\"1448\" height=\"1086\" \/><\/p>\n<p>M\u1ee9c quan tr\u1ecdng: GFCI \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t \u1edf m\u1ee9c 4 \u0111\u1ebfn 6 mA. So s\u00e1nh, 10 mA c\u00f3 th\u1ec3 g\u00e2y li\u1ec7t c\u01a1 (ng\u01b0\u1ee1ng \u201ckh\u00f4ng th\u1ec3 bu\u00f4ng tay\u201d), trong khi m\u1ee9c g\u00e2y ch\u1ebft ng\u01b0\u1eddi kho\u1ea3ng 30 mA. Trong mili gi\u00e2y, GFCIs k\u00edch ho\u1ea1t \u1edf 5 mA v\u00e0 ng\u0103n ch\u1eb7n \u0111i\u1ec7n gi\u1eadt tr\u01b0\u1edbc khi qu\u00e1 mu\u1ed9n. \u0110\u00f3 l\u00e0 l\u00fd do \u1ee6y ban An to\u00e0n S\u1ea3n ph\u1ea9m Ti\u00eau d\u00f9ng ch\u1ee7 y\u1ebfu c\u00f4ng nh\u1eadn GFCIs \u0111\u00e3 c\u1ee9u h\u00e0ng tr\u0103m ng\u01b0\u1eddi kh\u1ecfi \u0111i\u1ec7n gi\u1eadt. GFCIs c\u00f3 hai lo\u1ea1i ch\u00ednh:<\/p>\n<ul>\n<li><span style=\"color: #ff0000;\">\u1ed4 c\u1eafm GFCI:<\/span> \u1ed5 c\u1eafm v\u1edbi c\u00e1c n\u00fat TEST v\u00e0 RESET m\u00e0 ch\u00fang ta bi\u1ebft c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y t\u1ea1i c\u00e1c v\u1ecb tr\u00ed s\u1eed d\u1ee5ng. N\u00f3 c\u0169ng c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c \u1ed5 c\u1eafm kh\u00e1c tr\u00ean m\u1ea1ch c\u1ee7a n\u00f3.<\/li>\n<li><span style=\"color: #ff0000;\">B\u1ed9 ng\u1eaft m\u1ea1ch GFCI:<\/span> \u0111\u1eb7t t\u1ea1i b\u1ea3ng \u0111i\u1ec7n, b\u1ea3o v\u1ec7 to\u00e0n b\u1ed9 m\u1ea1ch kh\u1ecfi nguy hi\u1ec3m.<\/li>\n<\/ul>\n<p>B\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/huyuglobal.com\/vi\/blog\/circuit-breaker-and-ground-fault-circuit-interrupter\/\">b\u1ed9 ng\u1eaft m\u1ea1ch v\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch l\u1ed7i \u0111\u1ea5t<\/a> gi\u1ea3i th\u00edch c\u00e1ch hai thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau.<\/p>\n<hr \/>\n<h2>C\u00e1ch GFCI ph\u00e1t hi\u1ec7n l\u1ed7i \u0111\u1ea5t<\/h2>\n<p>GFCI ch\u1ee9a m\u1ed9t bi\u1ebfn \u00e1p nh\u1ecf \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 bi\u1ebfn d\u00f2ng (CT) bao quanh c\u1ea3 d\u00e2y n\u00f3ng v\u00e0 d\u00e2y trung t\u00ednh. \u0110\u00e2y l\u00e0 c\u00e1ch n\u00f3 ho\u1ea1t \u0111\u1ed9ng:<\/p>\n<ul>\n<li><span style=\"color: #ff0000;\">Ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng:<\/span> D\u00f2ng \u0111i\u1ec7n ch\u1ea3y qua d\u00e2y n\u00f3ng v\u00e0 tr\u1edf l\u1ea1i qua d\u00e2y trung t\u00ednh v\u1edbi l\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n b\u1eb1ng nhau. C\u00e1c tr\u01b0\u1eddng t\u1eeb h\u1ee7y b\u1ecf nhau, do \u0111\u00f3 bi\u1ebfn \u00e1p kh\u00f4ng ph\u00e1t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n.<\/li>\n<li><span style=\"color: #ff0000;\">L\u1ed7i \u0111\u1ea5t:<\/span> D\u00f2ng \u0111i\u1ec7n b\u1ecb chuy\u1ec3n h\u01b0\u1edbng qua ng\u01b0\u1eddi, n\u01b0\u1edbc ho\u1eb7c ch\u1ed7 h\u1ecfng xu\u1ed1ng \u0111\u1ea5t thay v\u00ec theo \u0111\u01b0\u1eddng \u0111i th\u00f4ng th\u01b0\u1eddng. Do \u0111\u00f3, d\u00e2y n\u00f3ng c\u00f3 d\u00f2ng \u0111i\u1ec7n nhi\u1ec1u h\u01a1n d\u00e2y trung t\u00ednh.<\/li>\n<li><span style=\"color: #ff0000;\">M\u1ea5t c\u00e2n b\u1eb1ng:<\/span> Bi\u1ebfn \u00e1p ph\u00e1t hi\u1ec7n s\u1ef1 kh\u00e1c bi\u1ec7t t\u1eeb 4\u20136 miliampe.<\/li>\n<li><span style=\"color: #ff0000;\">T\u00edn hi\u1ec7u:<\/span> Bi\u1ebfn d\u00f2ng k\u00edch ho\u1ea1t m\u1ed9t solenoid m\u1edf c\u01a1 h\u1ecdc c\u00e1c ti\u1ebfp \u0111i\u1ec3m v\u00e0 ng\u1eaft ngu\u1ed3n \u0111i\u1ec7n kh\u1ecfi \u1ed5 c\u1eafm.<\/li>\n<li><span style=\"color: #ff0000;\">\u0110\u1eb7t l\u1ea1i:<\/span> Ng\u01b0\u1eddi d\u00f9ng c\u1ea7n nh\u1ea5n n\u00fat reset \u0111\u1ec3 b\u1eadt l\u1ea1i ngu\u1ed3n v\u00ec GFCI gi\u1eef th\u00f4ng tin v\u1ec1 l\u1ed7i.<\/li>\n<\/ul>\n<p>GFCI l\u00e0 lo\u1ea1i b\u1ea3o v\u1ec7 ho\u00e0n to\u00e0n kh\u00e1c v\u1edbi b\u1ed9 ng\u1eaft m\u1ea1ch v\u00ec n\u00f3 ph\u00e1t hi\u1ec7n r\u00f2 r\u1ec9 \u0111\u1ea5t ch\u1ee9 kh\u00f4ng ph\u1ea3i qu\u00e1 t\u1ea3i.<\/p>\n<hr \/>\n<h2>S\u1ef1 th\u1eadt v\u00e0 b\u1eb1ng ch\u1ee9ng: Ti\u00eau chu\u1ea9n &amp; M\u00e3<\/h2>\n<p>\u0110\u00e2y l\u00e0 b\u1eb1ng ch\u1ee9ng t\u00e0i li\u1ec7u gi\u1ea3i quy\u1ebft c\u00e2u h\u1ecfi m\u1ed9t l\u1ea7n v\u00e0 m\u00e3i m\u00e3i:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ngu\u1ed3n<\/th>\n<th>N\u1ed9i dung<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>NFPA 70 (M\u00e3 \u0111i\u1ec7n qu\u1ed1c gia)<\/strong><\/td>\n<td>\u0110\u1ecbnh ngh\u0129a v\u00e0 y\u00eau c\u1ea7u \u201cground-fault circuit-interrupters\u201d trong \u0110i\u1ec1u 210.8 (\u0111\u01a1n v\u1ecb c\u01b0 tr\u00fa), \u0110i\u1ec1u 210.12 (l\u1ed7i h\u1ed3 quang), v\u00e0 \u0110i\u1ec1u 680 (h\u1ed3 b\u01a1i). Thu\u1eadt ng\u1eef ch\u00ednh th\u1ee9c l\u00e0 \u201cinterrupter.\u201d<\/td>\n<\/tr>\n<tr>\n<td><strong>UL 943<\/strong><\/td>\n<td>Ti\u00eau chu\u1ea9n an to\u00e0n c\u00f3 ti\u00eau \u0111\u1ec1 \u201cTi\u00eau chu\u1ea9n An to\u00e0n cho B\u1ed9 ng\u1eaft m\u1ea1ch d\u00f2 d\u00f2ng \u0111i\u1ec7n r\u00f2.\u201d GFCI \u0111\u01b0\u1ee3c UL li\u1ec7t k\u00ea \u0111\u01b0\u1ee3c ki\u1ec3m tra \u0111\u1ec3 ng\u1eaft m\u1ea1ch \u1edf m\u1ee9c 4\u20136 mA trong v\u00f2ng 25 ms.<\/td>\n<\/tr>\n<tr>\n<td><strong>NEC 210.8<\/strong><\/td>\n<td>Y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 GFCI cho c\u00e1c \u1ed5 c\u1eafm ph\u00f2ng t\u1eafm, m\u1eb7t b\u00e0n b\u1ebfp, nh\u00e0 \u0111\u1ec3 xe, ngo\u00e0i tr\u1eddi, t\u1ea7ng h\u1ea7m, kh\u00f4ng gian crawl, khu v\u1ef1c gi\u1eb7t \u1ee7i v\u00e0 qu\u1ea7y bar \u01b0\u1edbt.<\/td>\n<\/tr>\n<tr>\n<td><strong>T\u00e0i li\u1ec7u nh\u00e0 s\u1ea3n xu\u1ea5t<\/strong><\/td>\n<td>Leviton, Eaton, Legrand, Hubbell \u2014 trang s\u1ea3n ph\u1ea9m v\u00e0 h\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t c\u1ee7a m\u1ecdi nh\u00e0 s\u1ea3n xu\u1ea5t l\u1edbn \u0111\u1ec1u s\u1eed d\u1ee5ng thu\u1eadt ng\u1eef \u201cground fault circuit interrupter.\u201d<\/td>\n<\/tr>\n<tr>\n<td><strong>S\u1eed d\u1ee5ng t\u1eeb \u0111i\u1ec3n\/ng\u00e0nh<\/strong><\/td>\n<td>C\u00e1c b\u1ea3ng thu\u1eadt ng\u1eef ng\u00e0nh \u0111i\u1ec7n (IEEE, ESFI, OSHA) \u0111\u1ec1u \u0111\u1ecbnh ngh\u0129a GFCI l\u00e0 \u201cground fault circuit interrupter.\u201d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>T\u1ea5t c\u1ea3 c\u00e1c c\u01a1 quan ch\u00ednh th\u1ed1ng v\u1ec1 \u0111i\u1ec7n \u0111\u1ec1u tr\u00e1nh s\u1eed d\u1ee5ng thu\u1eadt ng\u1eef \u201cinterference.\u201d N\u1ebfu b\u1ea1n \u0111\u01b0\u1ee3c ki\u1ec3m tra ho\u1eb7c thi c\u1ea5p ph\u00e9p d\u1ef1a tr\u00ean t\u1eeb vi\u1ebft t\u1eaft n\u00e0y, c\u00e2u tr\u1ea3 l\u1eddi b\u1ea1n ph\u1ea3i ch\u1ecdn lu\u00f4n l\u00e0 t\u1eeb \u201cinterrupter.\u201d<\/p>\n<hr \/>\n<h2 id=\"where-required\">N\u01a1i C\u1ea7n C\u00f3 GFCI<\/h2>\n<p>Theo NEC 210.8, c\u00e1c khu v\u1ef1c sau trong m\u00f4i tr\u01b0\u1eddng d\u00e2n c\u01b0 b\u1eaft bu\u1ed9c ph\u1ea3i \u0111\u01b0\u1ee3c trang b\u1ecb b\u1ea3o v\u1ec7 Ground Fault Circuit Interrupter (GFCI):<\/p>\n<ul>\n<li>Ph\u00f2ng t\u1eafm ph\u1ea3i c\u00f3 b\u1ea3o v\u1ec7 GFCI cho t\u1ea5t c\u1ea3 c\u00e1c \u1ed5 c\u1eafm.<\/li>\n<li>\u0110\u1ed1i v\u1edbi m\u1eb7t b\u00e0n b\u1ebfp, t\u1ea5t c\u1ea3 c\u00e1c \u1ed5 c\u1eafm trong ph\u1ea1m vi 6 feet t\u1eeb b\u1ed3n r\u1eeda ph\u1ea3i \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1eb1ng GFCI.<\/li>\n<li>B\u1ea3o v\u1ec7 GFCI ph\u1ea3i \u0111\u01b0\u1ee3c cung c\u1ea5p trong t\u1ea5t c\u1ea3 c\u00e1c nh\u00e0 \u0111\u1ec3 xe ho\u1eb7c t\u1ea7ng h\u1ea7m ch\u01b0a ho\u00e0n thi\u1ec7n.<\/li>\n<li>T\u1ea5t c\u1ea3 c\u00e1c \u1ed5 c\u1eafm ngo\u00e0i tr\u1eddi, bao g\u1ed3m c\u1ea3 nh\u1eefng \u1ed5 c\u1eafm s\u1eed d\u1ee5ng trong kh\u00f4ng gian crawl v\u00e0 c\u00e1c t\u00f2a nh\u00e0 ch\u01b0a ho\u00e0n thi\u1ec7n ph\u1ea3i \u0111\u01b0\u1ee3c trang b\u1ecb GFCI.<\/li>\n<li>Ph\u00f2ng gi\u1eb7t \u1ee7i ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 GFCI.<\/li>\n<li>Qu\u1ea7y bar \u01b0\u1edbt ph\u1ea3i \u0111\u01b0\u1ee3c trang b\u1ecb b\u1ea3o v\u1ec7 GFCI.<\/li>\n<li>B\u1ea3o v\u1ec7 GFCI c\u0169ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u cho nh\u00e0 thuy\u1ec1n, h\u1ed3 b\u01a1i v\u00e0 spa.<\/li>\n<\/ul>\n<p>Tuy nhi\u00ean, c\u00e1c y\u00eau c\u1ea7u v\u1ec1 GFCI m\u1edf r\u1ed9ng c\u0169ng \u00e1p d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00f4ng nghi\u1ec7p. C\u00e1c m\u00e3 hi\u1ec7n h\u00e0nh \u0111\u00e3 tr\u1edf n\u00ean nghi\u00eam ng\u1eb7t h\u01a1n (2020 v\u00e0 2023) li\u00ean quan \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb tr\u01b0\u1edbc \u0111\u00e2y kh\u00f4ng y\u00eau c\u1ea7u GFCI ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<hr \/>\n<h2 id=\"trip-causes\">Nguy\u00ean nh\u00e2n khi\u1ebfn GFCI ng\u1eaft m\u1ea1ch l\u00e0 g\u00ec?<\/h2>\n<p>GFCI ng\u1eaft m\u1ea1ch b\u1ea5t c\u1ee9 khi n\u00e0o n\u00f3 ph\u00e1t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n r\u00f2 ra \u0111\u1ea5t. C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t:<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3673\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/08\/What-Causes-a-GFCI-to-Trip.webp\" alt=\"Nguy\u00ean nh\u00e2n khi\u1ebfn GFCI nh\u1ea3y\" width=\"1448\" height=\"1086\" \/><\/p>\n<table>\n<thead>\n<tr>\n<th>Nguy\u00ean nh\u00e2n<\/th>\n<th>\u0110i\u1ec1u g\u00ec \u0111ang x\u1ea3y ra<\/th>\n<th>Kh\u1eafc ph\u1ee5c<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u0110\u1ed9 \u1ea9m ho\u1eb7c n\u01b0\u1edbc<\/strong><\/td>\n<td>N\u01b0\u1edbc t\u1ea1o \u0111\u01b0\u1eddng d\u1eabn ra \u0111\u1ea5t (m\u01b0a tr\u00ean \u1ed5 c\u1eafm ngo\u00e0i tr\u1eddi, h\u01a1i n\u01b0\u1edbc trong ph\u00f2ng t\u1eafm, t\u1ea7ng h\u1ea7m \u1ea9m \u01b0\u1edbt)<\/td>\n<td>S\u1eed d\u1ee5ng n\u1eafp ch\u1ed1ng th\u1eddi ti\u1ebft; gi\u1eef \u1ed5 c\u1eafm kh\u00f4 r\u00e1o; b\u1ecbt k\u00edn l\u1ea1i h\u1ed9p ngo\u00e0i tr\u1eddi<\/td>\n<\/tr>\n<tr>\n<td><strong>Thi\u1ebft b\u1ecb b\u1ecb l\u1ed7i<\/strong><\/td>\n<td>D\u00e2y c\u00e1p b\u1ecb h\u1ecfng ho\u1eb7c ch\u1eadp b\u00ean trong l\u00e0m r\u00f2 d\u00f2ng \u0111i\u1ec7n ra v\u1ecf thi\u1ebft b\u1ecb<\/td>\n<td>R\u00fat ph\u00edch c\u1eafm v\u00e0 s\u1eeda ch\u1eefa\/thay th\u1ebf thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<tr>\n<td><strong>L\u1ed7i d\u00f2ng r\u00f2 trong d\u00e2y d\u1eabn<\/strong><\/td>\n<td>L\u1edbp c\u00e1ch \u0111i\u1ec7n b\u1ecb tr\u1ea7y x\u01b0\u1edbc ho\u1eb7c xu\u1ed1ng c\u1ea5p ch\u1ea1m v\u00e0o b\u1ec1 m\u1eb7t n\u1ed1i \u0111\u1ea5t<\/td>\n<td>Ki\u1ec3m tra d\u00e2y d\u1eabn; g\u1ecdi th\u1ee3 \u0111i\u1ec7n<\/td>\n<\/tr>\n<tr>\n<td><strong>Qu\u00e1 t\u1ea3i tr\u00ean m\u1ea1ch<\/strong><\/td>\n<td>Qu\u00e1 nhi\u1ec1u thi\u1ebft b\u1ecb k\u00e9o d\u00f2ng \u0111i\u1ec7n v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ea1ch (nhi\u1ec7t, kh\u00f4ng nh\u1ea5t thi\u1ebft l\u00e0 r\u00f2 r\u1ec9)<\/td>\n<td>Chuy\u1ec3n thi\u1ebft b\u1ecb sang m\u1ea1ch kh\u00e1c; gi\u1ea3m t\u1ea3i<\/td>\n<\/tr>\n<tr>\n<td><strong>V\u1ea5n \u0111\u1ec1 \u1ed5 c\u1eafm ph\u00eda sau<\/strong><\/td>\n<td>M\u1ed9t \u1ed5 c\u1eafm kh\u00e1c tr\u00ean c\u00f9ng m\u1ea1ch \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi GFCI b\u1ecb l\u1ed7i<\/td>\n<td>Ng\u1eaft k\u1ebft n\u1ed1i t\u1ea3i ph\u00eda sau; ki\u1ec3m tra t\u1eebng \u1ed5 c\u1eafm<\/td>\n<\/tr>\n<tr>\n<td><strong>GFCI c\u0169 ho\u1eb7c h\u1ecfng<\/strong><\/td>\n<td>C\u00e1c th\u00e0nh ph\u1ea7n b\u00ean trong b\u1ecb m\u00f2n (GFCI c\u00f3 tu\u1ed5i th\u1ecd kho\u1ea3ng 10\u201315 n\u0103m)<\/td>\n<td>Thay th\u1ebf GFCI; ki\u1ec3m tra h\u00e0ng th\u00e1ng b\u1eb1ng n\u00fat TEST<\/td>\n<\/tr>\n<tr>\n<td><strong>Nhi\u1ec5u \u0111i\u1ec7n \/ ng\u1eaft m\u1ea1ch kh\u00f4ng mong mu\u1ed1n<\/strong><\/td>\n<td>\u0110\u1ed9ng c\u01a1 l\u1edbn ho\u1eb7c thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 t\u1ea1o ra s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng t\u1ea1m th\u1eddi<\/td>\n<td>S\u1eed d\u1ee5ng m\u1ea1ch ri\u00eang cho c\u00e1c thi\u1ebft b\u1ecb l\u1edbn<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 ch\u1ea9n \u0111o\u00e1n ng\u1eaft m\u1ea1ch l\u1eb7p l\u1ea1i \u1edf c\u1ea5p \u0111\u1ed9 b\u1ed9 ng\u1eaft m\u1ea1ch, xem c\u00e1c b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/huyuglobal.com\/vi\/blog\/what-causes-a-circuit-breaker-to-trip\/\">nguy\u00ean nh\u00e2n khi\u1ebfn b\u1ed9 ng\u1eaft m\u1ea1ch ng\u1eaft<\/a> v\u00e0 <a href=\"https:\/\/huyuglobal.com\/vi\/blog\/is-it-dangerous-if-a-circuit-breaker-keeps-tripping\/\">li\u1ec7u b\u1ed9 ng\u1eaft m\u1ea1ch ng\u1eaft li\u00ean t\u1ee5c c\u00f3 nguy hi\u1ec3m hay kh\u00f4ng<\/a>.<\/p>\n<hr \/>\n<h2>Nh\u1eefng thi\u1ebft b\u1ecb kh\u00f4ng n\u00ean c\u1eafm v\u00e0o GFCI<\/h2>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t chi ti\u1ebft quan tr\u1ecdng c\u1ea7n l\u01b0u \u00fd. C\u00e1c quy chu\u1ea9n x\u00e2y d\u1ef1ng quy \u0111\u1ecbnh s\u1ef1 c\u1ea7n thi\u1ebft c\u1ee7a an to\u00e0n GFCI trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, nh\u01b0ng c\u00f3 m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb kh\u00f4ng n\u00ean ho\u1ea1t \u0111\u1ed9ng tr\u00ean c\u00e1c m\u1ea1ch \u0111\u01b0\u1ee3c trang b\u1ecb an to\u00e0n GFCI v\u00ec vi\u1ec7c t\u1eaft \u0111\u1ed9t ng\u1ed9t c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u01b0 h\u1ecfng.<\/p>\n<ul>\n<li>T\u1ee7 l\u1ea1nh v\u00e0 t\u1ee7 \u0111\u00f4ng: n\u1ebfu GFCI ng\u1eaft m\u1ea1ch \u0111\u1ed9t ng\u1ed9t, t\u1ee7 l\u1ea1nh s\u1ebd t\u1eaft m\u00e0 b\u1ea1n kh\u00f4ng nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c v\u00e0 t\u00ecnh tr\u1ea1ng n\u00e0y d\u1eabn \u0111\u1ebfn th\u1ef1c ph\u1ea9m b\u1ecb h\u1ecfng. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, th\u1ee3 \u0111i\u1ec7n th\u01b0\u1eddng \u0111\u1eb7t t\u1ee7 l\u1ea1nh tr\u00ean c\u00e1c m\u1ea1ch ri\u00eang bi\u1ec7t v\u00e0 \u0111\u1ea3m b\u1ea3o ch\u1ec9 c\u00f3 b\u1ea3o v\u1ec7 GFCI \u1edf nh\u1eefng n\u01a1i \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh b\u1edfi m\u00e3, v\u00ed d\u1ee5 nh\u01b0 khi \u0111\u1eb7t c\u00e1ch b\u1ed3n r\u1eeda d\u01b0\u1edbi 6 feet.<\/li>\n<li>M\u00e1y b\u01a1m h\u1ed1 thu n\u01b0\u1edbc: trong tr\u01b0\u1eddng h\u1ee3p GFCI \u0111\u00e3 ng\u1eaft m\u1ea1ch, m\u00e1y b\u01a1m s\u1ebd t\u1eaft v\u00e0 t\u1ea7ng h\u1ea7m b\u1ecb ng\u1eadp n\u01b0\u1edbc. Quy chu\u1ea9n hi\u1ec7n h\u00e0nh quy \u0111\u1ecbnh c\u00e1c m\u1ea1ch m\u00e1y b\u01a1m h\u1ed1 thu n\u01b0\u1edbc ph\u1ea3i c\u00f3 b\u1ea3o v\u1ec7 GFCI, do \u0111\u00f3 n\u00ean s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch GFCI c\u00f3 c\u1ea3m bi\u1ebfn b\u00e1o \u0111\u1ed9ng ho\u1eb7c m\u00e1y b\u01a1m h\u1ed1 thu n\u01b0\u1edbc ch\u1ea1y b\u1eb1ng pin.<\/li>\n<li>Thi\u1ebft b\u1ecb h\u1ed7 tr\u1ee3 s\u1ef1 s\u1ed1ng v\u00e0 m\u00e1y y t\u1ebf: nh\u1eefng thi\u1ebft b\u1ecb n\u00e0y ph\u1ea3i lu\u00f4n ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u1ea7n ngu\u1ed3n \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o li\u00ean t\u1ee5c.<\/li>\n<li>T\u1ee7 \u0111\u00f4ng v\u00e0 t\u1ee7 \u0111\u00f4ng trong gara: v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng t\u1ef1 nh\u01b0 \u0111\u1ed1i v\u1edbi t\u1ee7 l\u1ea1nh.<\/li>\n<li>M\u00e1y t\u00ednh\/m\u00e1y ch\u1ee7 (trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p): vi\u1ec7c ng\u1eaft m\u1ea1ch kh\u00f4ng mong mu\u1ed1n c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ea5t th\u00f4ng tin quan tr\u1ecdng, do \u0111\u00f3 ph\u1ea3i l\u1eafp \u0111\u1eb7t c\u00e1c m\u1ea1ch kh\u00f4ng gi\u00e1n \u0111o\u1ea1n.<\/li>\n<\/ul>\n<p>\u0110i\u1ec1u ch\u00ednh \u1edf \u0111\u00e2y l\u00e0 tu\u00e2n theo h\u01b0\u1edbng d\u1eabn c\u1ee7a NEC l\u00e0 b\u1eaft bu\u1ed9c n\u1ebfu b\u1ea3o v\u1ec7 GFCI \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u trong tr\u01b0\u1eddng h\u1ee3p c\u1ee7a b\u1ea1n v\u00ec m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb c\u00f3 m\u1ea1ch ri\u00eang bi\u1ec7t t\u00e1ch bi\u1ec7t v\u1edbi c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c v\u00e0 \u0111\u01b0\u1ee3c trang b\u1ecb c\u1ea7u dao GFCI c\u00f3 b\u00e1o \u0111\u1ed9ng \u0111\u1ec3 th\u00f4ng b\u00e1o cho b\u1ea1n v\u1ec1 t\u00ecnh tr\u1ea1ng ng\u1eaft m\u1ea1ch. Trong tr\u01b0\u1eddng h\u1ee3p b\u1ea1n kh\u00f4ng ch\u1eafc ch\u1eafn c\u00e1c y\u00eau c\u1ea7u hi\u1ec7n h\u00e0nh l\u00e0 g\u00ec, lu\u00f4n t\u1ed1t h\u01a1n khi li\u00ean h\u1ec7 v\u1edbi th\u1ee3 \u0111i\u1ec7n c\u00f3 gi\u1ea5y ph\u00e9p.<\/p>\n<hr \/>\n<h2>GFCI v\u00e0 C\u1ea7u dao: C\u00f3 ph\u1ea3i l\u00e0 c\u00f9ng m\u1ed9t th\u1ee9?<\/h2>\n<p>Kh\u00f4ng \u2014 ch\u00fang b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c nguy hi\u1ec3m kh\u00e1c nhau:<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3674\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/08\/GFCI-vs-Circuit-Breaker.webp\" alt=\"GFCI vs. B\u1ed9 ng\u1eaft m\u1ea1ch\" width=\"1448\" height=\"1086\" \/><\/p>\n<table>\n<thead>\n<tr>\n<th>Thi\u1ebft b\u1ecb<\/th>\n<th>B\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i<\/th>\n<th>Ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c<\/th>\n<th>Ng\u1eaft \u1edf<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>C\u1ea7u dao<\/strong><\/td>\n<td>\u0110i\u1ec7n d\u00e2y v\u00e0 thi\u1ebft b\u1ecb (ph\u00f2ng ch\u00e1y)<\/td>\n<td>Qu\u00e1 t\u1ea3i (d\u00f2ng \u0111i\u1ec7n qu\u00e1 l\u1edbn) v\u00e0 ng\u1eafn m\u1ea1ch<\/td>\n<td>D\u00f2ng \u0111\u1ecbnh m\u1ee9c (v\u00ed d\u1ee5: 15A, 20A)<\/td>\n<\/tr>\n<tr>\n<td><strong>GFCI<\/strong><\/td>\n<td>Con ng\u01b0\u1eddi (ph\u00f2ng ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt)<\/td>\n<td>D\u00f2ng \u0111i\u1ec7n r\u00f2 r\u1ec9 xu\u1ed1ng \u0111\u1ea5t (s\u1ef1 c\u1ed1 r\u00f2 \u0111\u1ea5t)<\/td>\n<td>R\u00f2 r\u1ec9 4\u20136 mA, trong v\u00f2ng 25 ms<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u1ea7u dao GFCI (c\u1ea3 hai)<\/strong><\/td>\n<td>Con ng\u01b0\u1eddi + d\u00e2y \u0111i\u1ec7n<\/td>\n<td>Qu\u00e1 t\u1ea3i + ng\u1eafn m\u1ea1ch + s\u1ef1 c\u1ed1 r\u00f2 \u0111\u1ea5t<\/td>\n<td>C\u1ea3 hai ng\u01b0\u1ee1ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Nh\u00e0 \u1edf hi\u1ec7n nay t\u00edch h\u1ee3p c\u1ea7u dao ti\u00eau chu\u1ea9n \u0111\u1ec3 b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i m\u1ea1ch, \u1ed5 c\u1eafm GFCI (Ground Fault Circuit Interrupter) ho\u1eb7c c\u1ea7u dao GFCI \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng s\u1ed1c \u0111i\u1ec7n, v\u00e0 c\u1ea7u dao m\u1ea1ch cung c\u1ea5p \u0111\u1ec3 ph\u00e1t hi\u1ec7n m\u1ee9c d\u00f2ng h\u1ed3 quang kh\u00f4ng an to\u00e0n. N\u1ebfu b\u1ea1n mu\u1ed1n hi\u1ec3u v\u1ec1 c\u00e1c thi\u1ebft b\u1ecb d\u00f2ng d\u01b0 li\u00ean quan \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf c\u00e1c khu v\u1ef1c kh\u00e1c tr\u00ean th\u1ebf gi\u1edbi, so s\u00e1nh c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/huyuglobal.com\/vi\/blog\/rccb-vs-rcbo\/\">RCCB v\u00e0 RCBO<\/a> bao g\u1ed3m c\u00e1c phi\u00ean b\u1ea3n qu\u1ed1c t\u1ebf c\u1ee7a c\u00f9ng m\u1ed9t kh\u00e1i ni\u1ec7m.<\/p>\n<hr \/>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>GFCI c\u00f3 ph\u1ea3i l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a ground fault circuit interrupter kh\u00f4ng?<\/h3>\n<p>\u0110\u00fang v\u1eady \u2014 GFCI c\u00f3 ngh\u0129a l\u00e0 ground fault circuit interrupter. \u0110\u00e2y l\u00e0 phi\u00ean b\u1ea3n ch\u00ednh x\u00e1c \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh b\u1edfi M\u00e3 \u0111i\u1ec7n qu\u1ed1c gia (NFPA 70), UL 943 v\u00e0 t\u1ea5t c\u1ea3 c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t h\u00e0ng \u0111\u1ea7u. GFCI gi\u00e1m s\u00e1t d\u00f2ng \u0111i\u1ec7n \u0111i ra qua d\u00e2y n\u00f3ng so v\u1edbi d\u00f2ng \u0111i\u1ec7n tr\u1ea3 v\u1ec1 tr\u00ean d\u00e2y trung t\u00ednh, v\u00e0 GFCI ng\u1eaft m\u1ea1ch g\u1ea7n nh\u01b0 ngay l\u1eadp t\u1ee9c trong kho\u1ea3ng 1\/40 gi\u00e2y n\u1ebfu s\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u1ea1t kho\u1ea3ng 4-6 miliampe (s\u1ef1 c\u1ed1 r\u00f2 \u0111\u1ea5t). T\u1ea5t c\u1ea3 c\u00e1c tr\u1ea1ng th\u00e1i m\u1edf r\u1ed9ng kh\u00e1c nh\u01b0 nhi\u1ec5u m\u1ea1ch s\u1ef1 c\u1ed1 r\u00f2 \u0111\u1ea5t \u0111\u1ec1u sai.<\/p>\n<h3>Nh\u1eefng thi\u1ebft b\u1ecb n\u00e0o kh\u00f4ng n\u00ean c\u1eafm v\u00e0o GFCI?<\/h3>\n<p>C\u00e1c thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 nguy hi\u1ec3m n\u1ebfu m\u1ea5t \u0111i\u1ec7n l\u00e0 t\u1ee7 l\u1ea1nh (th\u1ef1c ph\u1ea9m h\u1ecfng), m\u00e1y b\u01a1m h\u1ed1 ga (ng\u1eadp l\u1ee5t), thi\u1ebft b\u1ecb y t\u1ebf v\u00e0 h\u1ed7 tr\u1ee3 s\u1ef1 s\u1ed1ng (nguy hi\u1ec3m \u0111\u1ebfn t\u00ednh m\u1ea1ng), v\u00e0 m\u00e1y t\u00ednh\/m\u00e1y ch\u1ee7 quan tr\u1ecdng (nguy c\u01a1 m\u1ea5t d\u1eef li\u1ec7u). Tuy nhi\u00ean, quy \u0111\u1ecbnh v\u1eabn y\u00eau c\u1ea7u ph\u1ea3i c\u00f3 GFCI \u1edf nhi\u1ec1u n\u01a1i n\u00e0y. Trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u1ea1ch ri\u00eang bi\u1ec7t, c\u1ea7u dao GFCI c\u00f3 b\u00e1o \u0111\u1ed9ng ho\u1eb7c pin d\u1ef1 ph\u00f2ng; b\u1ea3o v\u1ec7 kh\u00f4ng n\u00ean b\u1ecb b\u1ecf qua. H\u00e3y tham kh\u1ea3o chuy\u00ean gia cho t\u00ecnh hu\u1ed1ng c\u1ee7a b\u1ea1n v\u00e0 ki\u1ec3m tra c\u00e1c quy \u0111\u1ecbnh \u0111\u1ecba ph\u01b0\u01a1ng.<\/p>\n<h3>GFCI c\u00f3 \u00fd ngh\u0129a g\u00ec \u0111\u1ed1i v\u1edbi l\u1eafp \u0111\u1eb7t m\u1ea1ch, c\u1ea7u ch\u00ec t\u1ed5ng, m\u1ea1ch xung, thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch s\u1ef1 c\u1ed1 r\u00f2 \u0111\u1ea5t, l\u1eafp \u0111\u1eb7t m\u1ea1ch s\u1ef1 c\u1ed1 r\u00f2 \u0111\u1ea5t?<\/h3>\n<p>C\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang l\u00e0 ground fault circuit interrupter. T\u1ea5t c\u1ea3 c\u00e1c l\u1ef1a ch\u1ecdn kh\u00e1c \u0111\u1ec1u sai; \u201cgrand fuse circuitry\u201d nh\u1ea7m l\u1eabn GFCI v\u1edbi c\u1ea7u ch\u00ec; \u201cimpulse\u201d kh\u00f4ng li\u00ean quan \u0111\u1ebfn ch\u1ee9c n\u0103ng c\u1ee7a GFCI; v\u00e0 \u201cground fault circuitry installation\u201d m\u00f4 t\u1ea3 m\u1ed9t l\u1eafp \u0111\u1eb7t chung chung ch\u1ee9 kh\u00f4ng ph\u1ea3i thi\u1ebft b\u1ecb. Thu\u1eadt ng\u1eef ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1ecbnh ngh\u0129a trong NEC v\u00e0 UL ch\u1ec9 c\u00f3 ground fault circuit interrupter \u2014 thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch ngay khi ph\u00e1t hi\u1ec7n l\u1ed7i n\u1ed1i \u0111\u1ea5t.<\/p>\n<h3>\u0110i\u1ec1u g\u00ec c\u00f3 th\u1ec3 khi\u1ebfn ground fault circuit interrupter (GFCI) nh\u1ea3y?<\/h3>\n<p>Khi GFCI nh\u1eadn bi\u1ebft d\u00f2ng \u0111i\u1ec7n r\u00f2 r\u1ec9 xu\u1ed1ng \u0111\u1ea5t (4\u20136 mA), n\u00f3 s\u1ebd nh\u1ea3y. C\u00e1c nguy\u00ean nh\u00e2n th\u01b0\u1eddng g\u1eb7p bao g\u1ed3m: s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a \u0111\u1ed9 \u1ea9m ho\u1eb7c n\u01b0\u1edbc trong khu v\u1ef1c \u1ed5 c\u1eafm (nh\u01b0 m\u01b0a, h\u01a1i n\u01b0\u1edbc, t\u1ea7ng h\u1ea7m \u1ea9m \u01b0\u1edbt); thi\u1ebft b\u1ecb b\u1ecb l\u1ed7i c\u00f3 d\u00e2y h\u1ecfng ho\u1eb7c ch\u1eadp b\u00ean trong; l\u1ed7i n\u1ed1i \u0111\u1ea5t trong h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n (l\u1edbp c\u00e1ch \u0111i\u1ec7n b\u1ecb tr\u1ea7y x\u01b0\u1edbc); qu\u00e1 t\u1ea3i m\u1ea1ch do k\u1ebft n\u1ed1i qu\u00e1 nhi\u1ec1u thi\u1ebft b\u1ecb; s\u1ef1 c\u1ed1 \u1edf c\u00e1c \u1ed5 c\u1eafm ph\u00eda sau c\u00f9ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi GFCI; GFCI c\u0169 ho\u1eb7c h\u1ecfng (tu\u1ed5i th\u1ecd kho\u1ea3ng 10-15 n\u0103m); v\u00e0 nhi\u1ec5u do \u0111\u1ed9ng c\u01a1 l\u1edbn g\u00e2y ra. N\u1ebfu GFCI nh\u1ea3y qu\u00e1 th\u01b0\u1eddng xuy\u00ean, c\u1ea7n r\u00fat t\u1ea5t c\u1ea3 thi\u1ebft b\u1ecb ra kh\u1ecfi m\u1ea1ch. Sau \u0111\u00f3, ph\u1ea3i \u0111\u1eb7t l\u1ea1i v\u00e0 c\u1eafm l\u1ea1i t\u1eebng thi\u1ebft b\u1ecb m\u1ed9t \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ngu\u1ed3n g\u00e2y l\u1ed7i, ho\u1eb7c c\u1ea7n nh\u1edd \u0111\u1ebfn s\u1ef1 tr\u1ee3 gi\u00fap c\u1ee7a th\u1ee3 \u0111i\u1ec7n chuy\u00ean nghi\u1ec7p.<\/p>\n<hr \/>\n<h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/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\" target=\"_blank\" rel=\"noopener\">NFPA 70 (M\u00e3 \u0111i\u1ec7n qu\u1ed1c gia)<\/a> \u2014 B\u1ed9 quy chu\u1ea9n ch\u00ednh th\u1ee9c \u0111\u1ecbnh ngh\u0129a \u201cground-fault circuit-interrupter\u201d v\u00e0 ch\u1ec9 r\u00f5 n\u01a1i c\u1ea7n b\u1ea3o v\u1ec7 GFCI (\u0110i\u1ec1u 210.8, \u0110i\u1ec1u 680).<\/li>\n<li><a href=\"https:\/\/www.ul.com\/resources\/standards\/standard-safety-ground-fault-circuit-interrupters-ul-943\" target=\"_blank\" rel=\"noopener\">UL 943 \u2014 Ti\u00eau chu\u1ea9n An to\u00e0n cho Ground-Fault Circuit-Interrupters<\/a> \u2014 Ti\u00eau chu\u1ea9n an to\u00e0n UL ch\u1ee9ng nh\u1eadn GFCI, quy \u0111\u1ecbnh ng\u01b0\u1ee1ng nh\u1ea3y 4\u20136 mA v\u00e0 th\u1eddi gian nh\u1ea3y 25 ms.<\/li>\n<li><a href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener\">An to\u00e0n \u0111i\u1ec7n OSHA<\/a> \u2014 H\u01b0\u1edbng d\u1eabn an to\u00e0n lao \u0111\u1ed9ng t\u1ea1i M\u1ef9 v\u1ec1 vi\u1ec7c s\u1eed d\u1ee5ng GFCI trong x\u00e2y d\u1ef1ng v\u00e0 c\u00f4ng nghi\u1ec7p n\u00f3i chung, c\u1ee7ng c\u1ed1 thu\u1eadt ng\u1eef ch\u00ednh x\u00e1c v\u00e0 \u1ee9ng d\u1ee5ng b\u1eaft bu\u1ed9c.<\/li>\n<li><a href=\"https:\/\/www.esfi.org\/\" target=\"_blank\" rel=\"noopener\">Qu\u1ef9 An to\u00e0n \u0110i\u1ec7n Qu\u1ed1c t\u1ebf (ESFI)<\/a> \u2014 T\u1ed5 ch\u1ee9c phi l\u1ee3i nhu\u1eadn cung c\u1ea5p gi\u00e1o d\u1ee5c ng\u01b0\u1eddi ti\u00eau d\u00f9ng v\u1ec1 ki\u1ec3m tra, l\u1eafp \u0111\u1eb7t GFCI v\u00e0 vai tr\u00f2 c\u1ee9u s\u1ed1ng c\u1ee7a b\u1ea3o v\u1ec7 l\u1ed7i n\u1ed1i \u0111\u1ea5t.<\/li>\n<li><a href=\"https:\/\/www.cpsc.gov\/Safety-Education\/Safety-Education-Centers\/Electrical-Safety\" target=\"_blank\" rel=\"noopener\">An to\u00e0n \u0111i\u1ec7n CPSC<\/a> \u2014 D\u1eef li\u1ec7u c\u1ee7a \u1ee6y ban An to\u00e0n S\u1ea3n ph\u1ea9m Ti\u00eau d\u00f9ng M\u1ef9 v\u1ec1 c\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111i\u1ec7n gi\u1eadt \u0111\u01b0\u1ee3c ng\u0103n ch\u1eb7n nh\u1edd GFCI v\u00e0 h\u01b0\u1edbng d\u1eabn an to\u00e0n \u0111i\u1ec7n gia \u0111\u00ecnh.<\/li>\n<li><a href=\"https:\/\/www.energy.gov\/energysaver\/operating-gfci-outlets-and-switches\" target=\"_blank\" rel=\"noopener\">U.S. Department of Energy \u2014 V\u1eadn h\u00e0nh \u1ed5 c\u1eafm GFCI<\/a> \u2014 H\u01b0\u1edbng d\u1eabn th\u1ef1c t\u1ebf v\u1ec1 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u1ed5 c\u1eafm GFCI, c\u00e1ch ki\u1ec3m tra h\u00e0ng th\u00e1ng v\u00e0 nguy\u00ean nh\u00e2n g\u00e2y nh\u1ea3y.<\/li>\n<\/ul>\n<hr \/>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>R\u00f5 r\u00e0ng GFCI c\u00f3 ngh\u0129a l\u00e0 Ground Fault Circuit Interrupter ch\u1ee9 kh\u00f4ng ph\u1ea3i \u201cground fault circuit interference.\u201d T\u1eeb \u201cinterrupter\u201d \u0111\u01b0\u1ee3c d\u00f9ng v\u00ec n\u00f3 m\u00f4 t\u1ea3 ch\u1ee9c n\u0103ng c\u1ee7a thi\u1ebft b\u1ecb n\u00e0y \u2014 t\u1ea1m th\u1eddi ng\u1eaft m\u1ea1ch sau khi ph\u00e1t hi\u1ec7n l\u1ed7i n\u1ed1i \u0111\u1ea5t. Trong khi \u0111\u00f3, t\u1eeb \u201cinterference\u201d ch\u1ec9 s\u1ef1 can thi\u1ec7p g\u00e2y gi\u00e1n \u0111o\u1ea1n ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng, \u0111i\u1ec1u ho\u00e0n to\u00e0n tr\u00e1i ng\u01b0\u1ee3c v\u1edbi ch\u1ee9c n\u0103ng c\u1ee7a GFCI.<\/p>\n<p>\u0110\u00e2y l\u00e0 nh\u1eefng \u0111i\u1ec3m c\u1ea7n ghi nh\u1edb:<\/p>\n<ul>\n<li>Thu\u1eadt ng\u1eef ch\u00ednh x\u00e1c l\u00e0 interrupter, \u0111\u00e3 \u0111\u01b0\u1ee3c NEC, UL 943, OSHA v\u00e0 t\u1ea5t c\u1ea3 nh\u00e0 s\u1ea3n xu\u1ea5t x\u00e1c nh\u1eadn ch\u00ednh th\u1ee9c.<\/li>\n<li>GFCI so s\u00e1nh d\u00f2ng \u0111i\u1ec7n \u0111i ra v\u00e0 d\u00f2ng \u0111i\u1ec7n \u0111i v\u00e0o; n\u00f3 nh\u1ea3y \u1edf m\u1ee9c 4-6 mA trong v\u00f2ng v\u00e0i mili gi\u00e2y.<\/li>\n<li>N\u00f3 b\u1ea3o v\u1ec7 con ng\u01b0\u1eddi nh\u01b0ng kh\u00f4ng b\u1ea3o v\u1ec7 d\u00e2y d\u1eabn v\u00ec trong khi b\u1ea3o v\u1ec7 m\u1ea1ch ng\u0103n qu\u00e1 t\u1ea3i, GFCI ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 ng\u0103n ng\u1eeba s\u1ed1c \u0111i\u1ec7n.<\/li>\n<li>\u0110\u1ea3m b\u1ea3o GFCI \u0111\u01b0\u1ee3c ki\u1ec3m tra h\u00e0ng th\u00e1ng b\u1eb1ng n\u00fat TEST, v\u00e0 \u0111\u01b0\u1ee3c thay th\u1ebf sau m\u1ed7i 10-15 n\u0103m.<\/li>\n<li>Tr\u00e1nh k\u1ebft n\u1ed1i thi\u1ebft b\u1ecb h\u1ed7 tr\u1ee3 s\u1ef1 s\u1ed1ng v\u00e0 l\u01b0u tr\u1eef th\u1ef1c ph\u1ea9m v\u00e0o c\u00e1c m\u1ea1ch GFCI n\u01a1i vi\u1ec7c ng\u1eaft m\u1ea1ch c\u00f3 th\u1ec3 g\u00e2y h\u1ea1i \u2014 thay v\u00e0o \u0111\u00f3, ch\u1ecdn c\u00e1c m\u1ea1ch kh\u00f4ng c\u00f3 GFCI ho\u1eb7c c\u00f3 t\u00edn hi\u1ec7u b\u00e1o \u0111\u1ed9ng n\u1ebfu \u0111\u01b0\u1ee3c ph\u00e9p theo quy \u0111\u1ecbnh.<\/li>\n<\/ul>\n<p>L\u1ea7n t\u1edbi khi b\u1ea1n th\u1ea5y \u201cGFCI l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a ground fault circuit interference\u201d tr\u00ean m\u1ea1ng, b\u1ea1n s\u1ebd bi\u1ebft ch\u1eafc ch\u1eafn r\u1eb1ng \u0111i\u1ec1u n\u00e0y sai v\u00e0 l\u00fd do t\u1ea1i sao.<\/p>","protected":false},"excerpt":{"rendered":"<p>You might be reading a specification sheet, preparing for a test in electricity, or simply trying to figure out how your kitchen outlets work when you stumble on the statement that \u201cGFCI means ground fault circuit interference.\u201d It may sound right, but it is wrong. What GFCI actually means is ground fault circuit interrupter. You [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3678,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-3670","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/3670","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/comments?post=3670"}],"version-history":[{"count":3,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/3670\/revisions"}],"predecessor-version":[{"id":3677,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/3670\/revisions\/3677"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/media\/3678"}],"wp:attachment":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/media?parent=3670"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/categories?post=3670"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/tags?post=3670"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}