{"id":3031,"date":"2026-07-11T11:48:23","date_gmt":"2026-07-11T11:48:23","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=3031"},"modified":"2026-07-11T11:48:25","modified_gmt":"2026-07-11T11:48:25","slug":"what-size-breaker-for-a-dryer","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/vi\/blog\/what-size-breaker-for-a-dryer\/","title":{"rendered":"K\u00edch th\u01b0\u1edbc Breaker n\u00e0o cho m\u00e1y s\u1ea5y?"},"content":{"rendered":"

Ch\u1ee7 nh\u00e0 \u1edf Seattle \u0111\u00e3 gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng vi\u1ec7c s\u1eed d\u1ee5ng m\u00e1y s\u1ea5y \u0111i\u1ec7n m\u1edbi c\u1ee7a anh \u1ea5y l\u00e0 d\u1ec5 d\u00e0ng. T\u1ea5t c\u1ea3 nh\u1eefng g\u00ec anh \u1ea5y c\u1ea7n l\u00e0m l\u00e0 c\u1eafm d\u00e2y b\u1ed1n ch\u1ea5u v\u00e0 b\u1eadt n\u00f3 l\u00ean. Nh\u01b0ng sau m\u01b0\u1eddi ph\u00fat v\u00e0o chu k\u1ef3 \u0111\u1ea7u ti\u00ean, c\u1ea7u dao \u0111\u00e3 t\u1eaft. Sau khi \u0111\u1eb7t l\u1ea1i c\u1ea7u dao, anh \u1ea5y \u0111\u00e3 th\u1eed l\u1ea1i, nh\u01b0ng c\u1ea7u dao l\u1ea1i t\u1eaft. M\u1eb7c d\u00f9 m\u00e1y s\u1ea5y m\u1edbi v\u00e0 \u0111\u01b0\u1ee3c c\u1eafm v\u00e0o m\u1ed9t b\u1ea3ng \u0111i\u1ec7n ph\u00f9 h\u1ee3p, nh\u01b0ng c\u1ea7u dao ch\u1ec9 \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c 20 ampe, \u0111i\u1ec1u n\u00e0y kh\u00f4ng \u0111\u1ee7 cho m\u00e1y s\u1ea5y, v\u00ec v\u1eady anh \u1ea5y c\u1ea7n s\u1eed d\u1ee5ng c\u1ea7u dao hai c\u1ef1c \u0111\u1ecbnh m\u1ee9c 30 ampe th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t cho m\u00e1y s\u1ea5y \u0111i\u1ec7n trong c\u00e1c h\u1ed9 gia \u0111\u00ecnh tr\u00ean kh\u1eafp B\u1eafc M\u1ef9. B\u1eb1ng c\u00e1ch ch\u1ecdn c\u1ea7u dao \u0111\u00fang cho m\u00e1y s\u1ea5y, b\u1ea1n c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c s\u1ef1 c\u1ed1 kh\u00f4ng mong mu\u1ed1n, v\u00ec vi\u1ec7c ch\u1ecdn k\u00edch th\u01b0\u1edbc \u0111\u00fang cho c\u1ea7u dao c\u1ea7n xem x\u00e9t \u0111\u1ebfn \u0111\u1ecbnh m\u1ee9c t\u1ea3i, k\u00edch th\u01b0\u1edbc d\u00e2y v\u00e0 \u0111\u1ecbnh m\u1ee9c c\u1ee7a \u1ed5 c\u1eafm.<\/p>\n

C\u00e2u tr\u1ea3 l\u1eddi ng\u1eafn g\u1ecdn: 30 Ampe, Hai c\u1ef1c<\/h2>\n

T\u1ea1i Hoa K\u1ef3 v\u00e0 Canada, c\u1ea7u dao \u0111i\u1ec7n ph\u00f9 h\u1ee3p cho m\u00e1y s\u1ea5y \u0111i\u1ec7n gia \u0111\u00ecnh th\u00f4ng th\u01b0\u1eddng l\u00e0 c\u1ea7u dao hai c\u1ef1c 30 ampe. C\u1ea7u dao n\u00e0y ph\u1ee5c v\u1ee5 \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c m\u1ea1ch 240 volt s\u1eed d\u1ee5ng d\u00e2y 10 AWG (10-gauge) v\u00e0 k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t trong hai \u1ed5 c\u1eafm NEMA 10-30R ho\u1eb7c NEMA 14-30R (NEMA 14-30R c\u00f3 b\u1ed1n ch\u1ea5u trong khi NEMA 10-30R c\u00f3 ba ch\u1ea5u). M\u00e1y s\u1ea5y s\u1eed d\u1ee5ng kho\u1ea3ng 22 \u0111\u1ebfn 28 ampe \u0111i\u1ec7n t\u00f9y thu\u1ed9c v\u00e0o m\u1eabu m\u00e3 v\u00e0 chu k\u1ef3, do \u0111\u00f3 n\u1eb1m d\u01b0\u1edbi gi\u1edbi h\u1ea1n t\u1ea3i 80% c\u1ee7a c\u00e1c m\u1ea1ch 30 ampe (l\u00e0 24 ampe). C\u1ea5u h\u00ecnh hai c\u1ef1c l\u00e0 c\u1ea7n thi\u1ebft v\u00ec m\u00e1y s\u1ea5y ho\u1ea1t \u0111\u1ed9ng tr\u00ean 240 volt, \u0111i\u1ec1u n\u00e0y \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1eeb hai m\u1ea1ch 120 volt trong m\u1ed9t h\u1ec7 th\u1ed1ng \u0111i\u1ec7n ph\u00e2n chia c\u1ee7a B\u1eafc M\u1ef9. Th\u00f4ng tin t\u1eeb c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb l\u1edbn nh\u01b0 Whirlpool<\/a> v\u00e0 Thi\u1ebft b\u1ecb GE<\/a> li\u00ean t\u1ee5c ch\u1ec9 \u0111\u1ecbnh c\u1ea7u dao 30 ampe cho m\u00e1y s\u1ea5y d\u00e2n d\u1ee5ng, v\u00e0 \u0111\u00e2y l\u00e0 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c nh\u00fang trong B\u1ed9 lu\u1eadt \u0110i\u1ec7n Qu\u1ed1c gia (NEC) cho c\u00e1c m\u1ea1ch m\u00e1y s\u1ea5y.<\/p>\n

\"T\u1ea1i<\/p>\n

T\u1ea1i sao c\u1ea7n c\u1ea7u dao 30 ampe, hai c\u1ef1c<\/h2>\n

\u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t quy t\u1eafc t\u00f9y \u00fd. Y\u00eau c\u1ea7u n\u00e0y xu\u1ea5t ph\u00e1t t\u1eeb c\u00e1c \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n c\u1ee7a m\u00e1y s\u1ea5y, kh\u1ea3 n\u0103ng c\u1ee7a d\u00e2y d\u1eabn v\u00e0 kho\u1ea3ng c\u00e1ch an to\u00e0n nh\u01b0 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong B\u1ed9 lu\u1eadt \u0110i\u1ec7n Qu\u1ed1c gia. C\u1ea7u dao hai c\u1ef1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 cung c\u1ea5p 240 volt c\u1ea7n thi\u1ebft cho m\u00e1y s\u1ea5y ho\u1ea1t \u0111\u1ed9ng. C\u00f3 c\u00e1c c\u1ea7u dao m\u1ed9t c\u1ef1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ed9t b\u1ea3ng \u0111i\u1ec7n B\u1eafc M\u1ef9 ch\u1ec9 cung c\u1ea5p 120 volt \u0111\u1ebfn \u0111\u1ea5t. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 vi\u1ec7c k\u1ebft n\u1ed1i m\u1ed9t c\u1ea7u dao hai c\u1ef1c v\u1edbi hai thanh bus li\u1ec1n k\u1ec1 s\u1ebd t\u1ea1o ra ngu\u1ed3n \u0111i\u1ec7n 240 volt tr\u00ean hai d\u00e2y. Vi\u1ec7c s\u1eed d\u1ee5ng c\u1ea7u dao hai c\u1ef1c c\u0169ng \u0111\u1ea3m b\u1ea3o ng\u1eaft k\u1ebft n\u1ed1i c\u1ea3 hai d\u00e2y n\u1ebfu m\u1ed9t trong s\u1ed1 ch\u00fang b\u1ecb qu\u00e1 t\u1ea3i ho\u1eb7c ng\u1eafn m\u1ea1ch.<\/p>\n

\u0110\u1ecbnh m\u1ee9c 30 ampe l\u00e0 c\u1ea7n thi\u1ebft, v\u00ec t\u1ea3i l\u1edbn nh\u1ea5t, ph\u1ea7n t\u1eed gia nhi\u1ec7t c\u1ee7a m\u00e1y s\u1ea5y, ti\u00eau th\u1ee5 kh\u00e1 nhi\u1ec1u \u0111i\u1ec7n. Th\u00f4ng th\u01b0\u1eddng, \u0111\u1ecbnh m\u1ee9c c\u1ee7a m\u00e1y s\u1ea5y \u0111i\u1ec7n tr\u00ean nh\u00e3n cho th\u1ea5y m\u1ee9c ti\u00eau th\u1ee5 kho\u1ea3ng 5.000 \u0111\u1ebfn 5.600 watt \u1edf \u0111i\u1ec7n \u00e1p 240 volt, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng kho\u1ea3ng 21 \u0111\u1ebfn 23,3 ampe. \u0110\u1ed9ng c\u01a1 c\u0169ng s\u1eed d\u1ee5ng m\u1ed9t s\u1ed1 ampe. T\u1ed5ng s\u1ed1 l\u01b0\u1ee3ng tr\u1edf th\u00e0nh kho\u1ea3ng 22-28 ampe. Do \u0111\u00f3, c\u1ea7u dao 20 ampe s\u1ebd b\u1ecb qu\u00e1 t\u1ea3i b\u1edfi thi\u1ebft b\u1ecb n\u00e0y. C\u1ea7u dao 25 ampe s\u1ebd ho\u1ea1t \u0111\u1ed9ng d\u01b0\u1edbi \u00e1p l\u1ef1c, v\u00e0 \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 th\u1ef1c h\u00e0nh ti\u00eau chu\u1ea9n. M\u1ed9t c\u1ea7u dao 30\u2011amp cung c\u1ea5p s\u1ef1 b\u1ea3o v\u1ec7 \u0111\u00fang \u0111\u1eafn. \u0110\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 trong vi\u1ec7c kh\u1edbp c\u00e1c m\u1ee9c c\u1ea7u dao v\u1edbi c\u00e1c m\u1ea1ch \u0111i\u1ec7n gia \u0111\u00ecnh kh\u00e1c, h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <\/span>k\u00edch th\u01b0\u1edbc c\u1ea7u dao b\u1ea1n c\u1ea7n<\/a> gi\u1ea3i th\u00edch quy tr\u00ecnh x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc d\u1ef1a tr\u00ean NEC cho t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i t\u1ea3i th\u00f4ng th\u01b0\u1eddng.<\/span><\/p>\n

D\u00e2y v\u00e0 \u1ed4 c\u1eafm: M\u1ea1ch \u0110i\u1ec7n Ho\u00e0n Ch\u1ec9nh<\/h2>\n

C\u1ea7u dao ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a m\u1ea1ch. M\u1ea1ch m\u00e1y s\u1ea5y<\/strong> c\u0169ng y\u00eau c\u1ea7u k\u00edch th\u01b0\u1edbc d\u00e2y \u0111\u00fang v\u00e0 \u1ed5 c\u1eafm \u0111\u00fang, v\u00e0 c\u1ea3 ba ph\u1ea3i kh\u1edbp nhau. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u00f3m t\u1eaft c\u1ea5u h\u00ecnh ti\u00eau chu\u1ea9n cho m\u1ea1ch \u0111i\u1ec7n m\u00e1y s\u1ea5y gia \u0111\u00ecnh.<\/p>\n\n\n\n\n\n\n\n\n
Th\u00e0nh ph\u1ea7n<\/th>\nTh\u00f4ng s\u1ed1 K\u1ef9 thu\u1eadt Ti\u00eau chu\u1ea9n<\/th>\nGhi Ch\u00fa<\/th>\n<\/tr>\n<\/thead>\n
C\u1ea7u dao<\/strong><\/td>\n30\u2011amp, double\u2011pole<\/td>\n\u0110\u01b0\u1eddng cong ng\u1eaft ti\u00eau chu\u1ea9n; b\u1ea3o v\u1ec7 GFCI c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u theo quy \u0111\u1ecbnh \u0111\u1ecba ph\u01b0\u01a1ng \u1edf m\u1ed9t s\u1ed1 khu v\u1ef1c nh\u01b0 khu v\u1ef1c gi\u1eb7t l\u00e0 trong t\u1ea7ng h\u1ea7m ch\u01b0a ho\u00e0n thi\u1ec7n<\/td>\n<\/tr>\n
K\u00edch th\u01b0\u1edbc D\u00e2y<\/strong><\/td>\n10 AWG \u0111\u1ed3ng<\/td>\n10\/3 c\u00f3 \u0111\u1ea5t (b\u1ed1n d\u00e2y d\u1eabn: hai d\u00e2y n\u00f3ng, m\u1ed9t d\u00e2y trung t\u00ednh, m\u1ed9t d\u00e2y \u0111\u1ea5t) cho c\u00e1c l\u1eafp \u0111\u1eb7t m\u1edbi; 10\/2 c\u00f3 \u0111\u1ea5t (ba d\u00e2y d\u1eabn, kh\u00f4ng c\u00f3 d\u00e2y trung t\u00ednh) \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c l\u1eafp \u0111\u1eb7t c\u0169 v\u00e0 kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c ph\u00e9p cho c\u00e1c m\u1ea1ch m\u00e1y s\u1ea5y m\u1edbi theo NEC<\/td>\n<\/tr>\n
\u1ed4 c\u1eafm<\/strong><\/td>\nNEMA 14\u201130R (b\u1ed1n ch\u1ea5u)<\/td>\nB\u1eaft bu\u1ed9c cho t\u1ea5t c\u1ea3 c\u00e1c l\u1eafp \u0111\u1eb7t m\u1edbi k\u1ec3 t\u1eeb NEC 1996; cung c\u1ea5p k\u1ebft n\u1ed1i trung t\u00ednh v\u00e0 \u0111\u1ea5t ri\u00eang bi\u1ec7t<\/td>\n<\/tr>\n
Ph\u00edch c\u1eafm (tr\u00ean d\u00e2y m\u00e1y s\u1ea5y)<\/strong><\/td>\nNEMA 14\u201130P (b\u1ed1n ch\u1ea5u)<\/td>\nPh\u1ea3i kh\u1edbp v\u1edbi \u1ed5 c\u1eafm; d\u00e2y m\u00e1y s\u1ea5y \u0111\u01b0\u1ee3c b\u00e1n ri\u00eang v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t tr\u00ean m\u00e1y s\u1ea5y theo h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

S\u01a1 \u0111\u1ed3 d\u00e2y \u0111i\u1ec7n r\u1ea5t quan tr\u1ecdng t\u1eeb g\u00f3c \u0111\u1ed9 an to\u00e0n, v\u00e0 vi\u1ec7c so s\u00e1nh gi\u1eefa d\u00e2y 10\/2 v\u00e0 d\u00e2y 10\/3 c\u1ea7n \u0111\u01b0\u1ee3c ch\u00fa \u00fd \u0111\u1eb7c bi\u1ec7t. Trong qu\u00e1 kh\u1ee9, c\u00e1c m\u1ea1ch c\u1ee7a m\u00e1y s\u1ea5y c\u0169 \u0111\u00e3 s\u1eed d\u1ee5ng l\u1eafp \u0111\u1eb7t 10\/2 c\u00f3 \u0111\u1ea5t tr\u01b0\u1edbc khi NEC \u0111\u01b0\u1ee3c thay \u0111\u1ed5i v\u00e0o n\u0103m 1996; d\u00e2y \u0111i\u1ec7n s\u1ebd bao g\u1ed3m hai d\u00e2y c\u00e1ch \u0111i\u1ec7n (c\u1ea3 hai \u0111\u1ec1u n\u00f3ng) v\u00e0 m\u1ed9t d\u00e2y kh\u00f4ng c\u00e1ch \u0111i\u1ec7n. Trong c\u00e1c l\u1eafp \u0111\u1eb7t n\u00e0y, d\u00e2y \u0111\u1ea5t \u0111\u01b0\u1ee3c coi l\u00e0 d\u00e2y \u0111\u1ea5t v\u00e0 d\u00e2y trung t\u00ednh c\u00f9ng m\u1ed9t l\u00fac. Tuy nhi\u00ean, d\u00e2y \u0111i\u1ec7n n\u00e0y kh\u00f4ng c\u00f2n h\u1ee3p l\u1ec7 v\u00ec n\u00f3 \u0111\u1eb7t d\u00f2ng \u0111i\u1ec7n l\u00ean d\u00e2y \u0111\u1ea5t, g\u00e2y ra nguy c\u01a1 s\u1ed1c \u0111i\u1ec7n. Do \u0111\u00f3, c\u00e1c y\u00eau c\u1ea7u hi\u1ec7n t\u1ea1i quy \u0111\u1ecbnh r\u1eb1ng d\u00e2y \u0111i\u1ec7n ph\u1ea3i bao g\u1ed3m 10\/3 c\u00f3 \u0111\u1ea5t, bao g\u1ed3m b\u1ed1n d\u00e2y - hai d\u00e2y n\u00f3ng (th\u01b0\u1eddng l\u00e0 \u0111en v\u00e0 \u0111\u1ecf) v\u00e0 m\u1ed9t d\u00e2y trung t\u00ednh m\u00e0u tr\u1eafng v\u00e0 m\u1ed9t d\u00e2y \u0111\u1ea5t (tr\u1ea7n ho\u1eb7c xanh). D\u00e2y trung t\u00ednh d\u1eabn d\u00f2ng \u0111i\u1ec7n tr\u1edf l\u1ea1i t\u1eeb c\u00e1c th\u00e0nh ph\u1ea7n 120 volt, trong khi d\u00e2y \u0111\u1ea5t ph\u1ee5c v\u1ee5 nhu c\u1ea7u b\u1ea3o v\u1ec7 l\u1ed7i. Do \u0111\u00f3, n\u1ebfu m\u1ea1ch m\u00e1y s\u1ea5y m\u1edbi \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t h\u00f4m nay, n\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c n\u1ed1i d\u00e2y b\u1eb1ng 10\/3.<\/p>\n

\"D\u00e2y<\/p>\n

B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u1ea7u dao 40\u2011amp kh\u00f4ng?<\/h2>\n

Kh\u00f4ng. M\u1ed9t c\u1ea7u dao 40-amp kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean m\u1ea1ch c\u1ee7a m\u00e1y s\u1ea5y s\u1eed d\u1ee5ng d\u00e2y 10-gauge v\u00ec \u0111i\u1ec1u n\u00e0y vi ph\u1ea1m quy \u0111\u1ecbnh v\u00e0 c\u0169ng l\u00e0 m\u1ed9t nguy c\u01a1 ch\u00e1y. M\u1ee5c \u0111\u00edch c\u1ee7a c\u1ea7u dao l\u00e0 b\u1ea3o v\u1ec7 d\u00e2y \u0111i\u1ec7n ch\u1ee9 kh\u00f4ng ph\u1ea3i thi\u1ebft b\u1ecb. Theo b\u1ea3ng ampacity c\u1ee7a B\u1ed9 lu\u1eadt \u0110i\u1ec7n Qu\u1ed1c gia (NEC), d\u00e2y 10 AWG ch\u1ec9 c\u00f3 th\u1ec3 ch\u1ecbu t\u1ed1i \u0111a 30 amp. Khi c\u1ea7u dao 40-amp \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean d\u00e2y 10-gauge, d\u00e2y c\u00f3 th\u1ec3 b\u1eaft l\u1eeda tr\u01b0\u1edbc khi c\u1ea7u dao th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5 c\u1ee7a n\u00f3. M\u1ed9t m\u00e1y s\u1ea5y l\u00e0m cho c\u1ea7u dao 30-amp ng\u1eaft c\u00f3 v\u1ea5n \u0111\u1ec1, ch\u1eb3ng h\u1ea1n nh\u01b0 ph\u1ea7n t\u1eed gia nhi\u1ec7t b\u1ecb l\u1ed7i, cu\u1ed9n \u0111\u1ed9ng c\u01a1 b\u1ecb h\u1ecfng, ho\u1eb7c m\u1ed9t v\u1ea5n \u0111\u1ec1 v\u1ec1 d\u00e2y \u0111i\u1ec7n c\u1ea7n s\u1eeda ch\u1eefa. B\u1eb1ng c\u00e1ch chuy\u1ec3n sang c\u1ea7u dao l\u1edbn h\u01a1n, l\u1ed7i s\u1ebd b\u1ecb che gi\u1ea5u v\u00e0 tr\u1edf n\u00ean nguy hi\u1ec3m h\u01a1n. Th\u1eddi \u0111i\u1ec3m duy nh\u1ea5t m\u00e0 c\u1ea7u dao 40-amp c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 khi nh\u00e0 s\u1ea3n xu\u1ea5t ch\u1ec9 \u0111\u1ecbnh r\u1eb1ng \u0111i\u1ec1u n\u00e0y l\u00e0 c\u1ea7n thi\u1ebft v\u00e0 to\u00e0n b\u1ed9 m\u1ea1ch \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n 40-amp. Nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0y r\u1ea5t hi\u1ebfm, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong nh\u1eefng ng\u00f4i nh\u00e0 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1ed1t.<\/p>\n

B\u1ea3o v\u1ec7 b\u1ed5 sung: GFCI, AFCI v\u00e0 B\u1ea3o v\u1ec7 qu\u00e1 \u00e1p<\/h2>\n

Ngo\u00e0i c\u1ea7u dao \u0111\u00f4i 30-amp th\u00f4ng th\u01b0\u1eddng, m\u1ed9t lo\u1ea1t c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 b\u1ea3o v\u1ec7 th\u00eam c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u00e0o m\u1ea1ch m\u00e1y s\u1ea5y \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng an to\u00e0n. M\u1ed9t thi\u1ebft b\u1ecb nh\u01b0 c\u1ea7u dao GFCI \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 mang l\u1ea1i b\u1ea3o v\u1ec7 l\u1ed7i \u0111\u1ea5t; n\u00f3 \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb cao trong nhi\u1ec1u quy \u0111\u1ecbnh x\u00e2y d\u1ef1ng \u0111\u1ecba ph\u01b0\u01a1ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c ph\u00f2ng gi\u1eb7t c\u1ee7a t\u1ea7ng h\u1ea7m ch\u01b0a ho\u00e0n thi\u1ec7n ho\u1eb7c gara c\u00f3 \u0111\u1ed9 \u1ea9m cao. SPD lo\u1ea1i 2 t\u1ea1i b\u1ea3ng \u0111i\u1ec7n ho\u1eb7c SPD lo\u1ea1i 3 t\u1ea1i \u1ed5 c\u1eafm b\u1ea3o v\u1ec7 b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n t\u1eed kh\u1ecfi c\u00e1c c\u00fa s\u1ed1c \u0111i\u1ec7n b\u1ea5t ng\u1edd d\u1eabn \u0111\u1ebfn m\u1ed9t s\u1ed1 thi\u1ec7t h\u1ea1i \u0111\u1eaft gi\u00e1 nh\u1ea5t. M\u1ed9t b\u00e0i tr\u00ecnh b\u00e0y to\u00e0n di\u1ec7n v\u1ec1 c\u00e1c thi\u1ebft b\u1ecb v\u00e0 c\u00f4ng ngh\u1ec7 b\u1ea3o v\u1ec7 \u0111i\u1ec7n hi\u1ec7n \u0111\u1ea1i s\u1ebd \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i \u201cC\u1ea7u dao UL 489 l\u00e0 g\u00ec?\u201d<\/p>\n

C\u00e0i \u0111\u1eb7t c\u01a1 b\u1ea3n cho \u0111\u01a1n v\u1ecb m\u00e1y s\u1ea5y li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng c\u1ea7u dao \u0111\u00f4i ti\u00eau chu\u1ea9n 30 amp nh\u01b0 c\u00e1c m\u1eabu c\u1ee7a HUYU \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p. C\u1ea7u dao ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 t\u1ea3i c\u1ee7a thi\u1ebft b\u1ecb \u0111i\u1ec7n c\u0169ng nh\u01b0 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u0111\u00fang c\u00e1ch theo h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t. N\u1ebfu c\u1ea7u dao \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i k\u00e9m v\u1edbi c\u00e1c thanh bus, ho\u1eb7c c\u00e1c d\u00e2y kh\u00f4ng \u0111\u01b0\u1ee3c si\u1ebft ch\u1eb7t \u0111\u1ee7, \u0111\u01a1n v\u1ecb s\u1ebd ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u0111\u00fang.<\/p>\n

C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

T\u00f4i c\u00f3 th\u1ec3 \u0111\u1eb7t m\u1ed9t m\u00e1y s\u1ea5y tr\u00ean c\u1ea7u dao 40 amp kh\u00f4ng?<\/h3>\n

Kh\u00f4ng, tr\u1eeb khi nh\u00e0 s\u1ea3n xu\u1ea5t m\u00e1y s\u1ea5y ch\u1ec9 \u0111\u1ecbnh c\u1ee5 th\u1ec3 vi\u1ec7c s\u1eed d\u1ee5ng 40 amp, v\u00e0 m\u1ea1ch \u0111\u01b0\u1ee3c \u0111\u1ea5u d\u00e2y theo y\u00eau c\u1ea7u 40 amp (d\u00e2y \u0111\u1ed3ng 8 AWG). Vi\u1ec7c c\u00f3 m\u1ed9t c\u1ea7u dao 40-amp v\u1edbi d\u00e2y 10-gauge vi ph\u1ea1m quy \u0111\u1ecbnh v\u00e0 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nguy c\u01a1 ch\u00e1y v\u00ec d\u00e2y c\u00f3 th\u1ec3 qu\u00e1 nhi\u1ec7t tr\u01b0\u1edbc khi n\u00f3 k\u00edch ho\u1ea1t.<\/p>\n

T\u00f4i c\u1ea7n c\u1ea7u dao k\u00edch th\u01b0\u1edbc n\u00e0o cho m\u00e1y s\u1ea5y 240v?<\/h3>\n

C\u1ea7u dao \u0111\u00f4i 30-amp th\u00f4ng th\u01b0\u1eddng l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 v\u1eadn h\u00e0nh m\u1ed9t m\u00e1y s\u1ea5y d\u00e2n d\u1ee5ng ti\u00eau chu\u1ea9n \u1edf 240 volt. C\u1ea5u h\u00ecnh c\u1ee7a c\u1ea7u dao \u0111\u00f4i cho ph\u00e9p c\u00f3 \u0111\u01b0\u1ee3c 240 volt th\u00f4ng qua hai ch\u00e2n 120-volt trong khi \u0111\u1ecbnh m\u1ee9c 30-amp ph\u00f9 h\u1ee3p v\u1edbi d\u00f2ng \u0111i\u1ec7n trung b\u00ecnh t\u1ed1i \u0111a c\u1ee7a m\u00e1y s\u1ea5y l\u00e0 22\u201328 amp.<\/p>\n

T\u00f4i c\u1ea7n 10 2 hay 10 3 cho m\u00e1y s\u1ea5y?<\/h3>\n

Khi l\u1eafp \u0111\u1eb7t m\u1ea1ch \u0111i\u1ec7n cho m\u00e1y s\u1ea5y, b\u1ea1n s\u1ebd c\u1ea7n m\u1ed9t c\u00e1p 10\/3 c\u00f3 \u0111\u1ea5t v\u1edbi b\u1ed1n d\u00e2y d\u1eabn; \u0111i\u1ec1u n\u00e0y bao g\u1ed3m hai d\u00e2y n\u00f3ng, m\u1ed9t d\u00e2y trung t\u00ednh v\u00e0 m\u1ed9t d\u00e2y \u0111\u1ea5t. C\u00e1c l\u1eafp \u0111\u1eb7t c\u0169 c\u00f3 c\u00e1p 10\/2 v\u1edbi \u0111\u1ea5t; \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 t\u1ed5ng c\u1ed9ng c\u00f3 ba d\u00e2y d\u1eabn, nh\u01b0ng \u0111i\u1ec1u n\u00e0y hi\u1ec7n nay b\u1ecb c\u1ea5m trong c\u00e1c l\u1eafp \u0111\u1eb7t m\u1edbi v\u00ec n\u00f3 th\u1ef1c s\u1ef1 s\u1eed d\u1ee5ng d\u00e2y \u0111\u1ea5t nh\u01b0 m\u1ed9t d\u00e2y d\u1eabn trung t\u00ednh ho\u1ea1t \u0111\u1ed9ng v\u00e0 do \u0111\u00f3 t\u1ea1o ra nguy c\u01a1 s\u1ed1c \u0111i\u1ec7n.<\/p>\n

M\u00e1y s\u1ea5y c\u00f3 c\u1ea7n c\u1ea7u dao 30 amp hai c\u1ef1c kh\u00f4ng?<\/h3>\n

Ch\u1eafc ch\u1eafn r\u1ed3i! M\u1ed9t m\u00e1y s\u1ea5y y\u00eau c\u1ea7u m\u1ed9t c\u1ea7u dao hai c\u1ef1c c\u00f3 \u0111\u1ecbnh m\u1ee9c 30 amp \u0111\u1ec3 c\u00f3 th\u1ec3 cung c\u1ea5p ngu\u1ed3n \u0111i\u1ec7n 240 volt v\u00e0 c\u1ea3 hai d\u00e2y n\u00f3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ng\u1eaft k\u1ebft n\u1ed1i c\u00f9ng nhau trong b\u1ea5t k\u1ef3 s\u1ef1 c\u1ed1 n\u00e0o c\u00f3 th\u1ec3 x\u1ea3y ra tr\u00ean m\u1ed9t trong hai d\u00e2y. \u0110\u00e2y l\u00e0 c\u1ea5u h\u00ecnh \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u b\u1edfi B\u1ed9 lu\u1eadt \u0110i\u1ec7n Qu\u1ed1c gia (NEC) v\u00e0 \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t cung c\u1ea5p trong c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a h\u1ecd.<\/p>\n

T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n