{"id":3860,"date":"2026-08-28T00:00:00","date_gmt":"2026-08-28T00:00:00","guid":{"rendered":"https:\/\/chac-electric.com\/?p=3860"},"modified":"2026-10-16T01:26:08","modified_gmt":"2026-10-16T01:26:08","slug":"kich-thuoc-hop-dien-cua-mot-gang","status":"publish","type":"post","link":"https:\/\/chac-electric.com\/vi\/blog\/single-gang-electrical-box-size\/","title":{"rendered":"K\u00edch th\u01b0\u1edbc h\u1ed9p \u0111i\u1ec7n \u0111\u01a1n Gang"},"content":{"rendered":"

M\u1ed9t thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch c\u00f3 th\u1ec3 kh\u1edbp v\u1edbi c\u00e1c \u1ed1c v\u00edt g\u1eafn v\u00e0 v\u1eabn qu\u00e1 s\u00e2u so v\u1edbi h\u1ed9p ph\u00eda sau. \u0110\u00e2y l\u00e0 \u0111i\u1ec3m y\u1ebfu ch\u00ednh khi so s\u00e1nh k\u00edch th\u01b0\u1edbc c\u1ee7a h\u1ed9p \u0111i\u1ec7n m\u1ed9t gang: k\u00edch th\u01b0\u1edbc m\u1eb7t m\u1edf, dung l\u01b0\u1ee3ng b\u00ean trong v\u00e0 \u0111\u1ed9 s\u00e2u c\u1ee7a h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u kh\u00e1c nhau.<\/p>\n

M\u1ed9t h\u1ed9p \u0111i\u1ec7n m\u1ed9t gang c\u00f3 th\u1ec3 ch\u1ee9a m\u1ed9t v\u1ecb tr\u00ed thi\u1ebft b\u1ecb, nh\u01b0ng kh\u00f4ng c\u00f3 m\u1ed9t b\u1ed9 k\u00edch th\u01b0\u1edbc chung nh\u1ea5t \u0111\u1ecbnh. \u0110\u1ea7u ti\u00ean h\u00e3y ch\u1ecdn h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t, sau \u0111\u00f3 ki\u1ec3m tra b\u1ea3n v\u1ebd h\u1ed9p \u0111i\u1ec7n, \u0111\u00e1nh d\u1ea5u v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng, \u0111\u1ed9 s\u00e2u c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 c\u00e1c \u0111\u1ea7u n\u1ed1i c\u00e1p. Trong c\u00e1c h\u1ec7 th\u1ed1ng d\u1ef1a tr\u00ean NEC, M\u1ee5c 314.16 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn kh\u1ed1i l\u01b0\u1ee3ng h\u1ed9p v\u00e0 \u0111\u1ed9 l\u1ea5p \u0111\u1ea7y d\u00e2y d\u1eabn; vi\u1ec7c t\u00ednh to\u00e1n n\u00e0y kh\u00f4ng lo\u1ea1i b\u1ecf nhu c\u1ea7u ri\u00eang bi\u1ec7t v\u1ec1 vi\u1ec7c thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i s\u1eed d\u1ee5ng d\u00e2y d\u1eabn b\u1ecb n\u00e9n ho\u1eb7c b\u1ecb h\u01b0 h\u1ea1i.<\/p>\n

\"K\u00edch<\/figure>\n

\u201cGang \u0111\u01a1n l\u1ebb\u201d n\u00f3i v\u1edbi b\u1ea1n \u0111i\u1ec1u g\u00ec v\u1ec1 chi\u1ebfc h\u1ed9p n\u00e0y?<\/h2>\n

\u201cGang\u201d m\u00f4 t\u1ea3 s\u1ed1 l\u01b0\u1ee3ng v\u1ecb tr\u00ed c\u1ee7a thi\u1ebft b\u1ecb. N\u00f3 kh\u00f4ng x\u00e1c \u0111\u1ecbnh chi\u1ec1u r\u1ed9ng b\u00ean ngo\u00e0i, \u0111\u01b0\u1eddng c\u1eaft t\u01b0\u1eddng, kho\u1ea3ng c\u00e1ch v\u00edt ho\u1eb7c \u0111\u1ed9 s\u00e2u b\u00ean trong theo c\u00e1c h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t kh\u00e1c nhau \u1edf c\u00e1c khu v\u1ef1c kh\u00e1c nhau. M\u1ed9t h\u1ed9p thi\u1ebft b\u1ecb h\u00ecnh ch\u1eef nh\u1eadt ki\u1ec3u B\u1eafc M\u1ef9 v\u00e0 m\u1ed9t h\u1ed9p d\u00e0nh cho h\u1ec7 th\u1ed1ng c\u00f4ng t\u1eafc c\u1ee7a qu\u1ed1c gia kh\u00e1c \u0111\u1ec1u c\u00f3 th\u1ec3 ch\u1ee9a m\u1ed9t thi\u1ebft b\u1ecb trong khi s\u1eed d\u1ee5ng c\u00e1c k\u00edch th\u01b0\u1edbc v\u00e0 ph\u1ee5 ki\u1ec7n kh\u00e1c nhau.<\/p>\n

H\u00e3y b\u1eaft \u0111\u1ea7u t\u1eeb t\u1edd h\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t c\u1ee7a c\u00f4ng t\u1eafc, \u1ed5 c\u1eafm ho\u1eb7c thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n. Ki\u1ec3m tra ki\u1ec3u l\u1eafp \u0111\u1eb7t c\u1ee7a n\u00f3 so v\u1edbi b\u1ea3n v\u1ebd h\u1ed9p, bao g\u1ed3m c\u1ea3 v\u1ecb tr\u00ed c\u1ee7a n\u1eafp v\u00e0 m\u1eb7t t\u01b0\u1eddng \u0111\u00e3 ho\u00e0n thi\u1ec7n. M\u1ed9t t\u1ea5m t\u01b0\u1eddng qu\u00e1 l\u1edbn c\u00f3 th\u1ec3 che gi\u1ea5u m\u1ed9t l\u1ed7 m\u1edf l\u1edbn h\u01a1n, nh\u01b0ng n\u00f3 kh\u00f4ng th\u1ec3 l\u00e0m cho c\u00e1c ph\u1ea7n k\u1ebft n\u1ed1i kh\u00f4ng t\u01b0\u01a1ng th\u00edch ho\u1eb7c m\u1ed9t thi\u1ebft b\u1ecb bao b\u1ecdc qu\u00e1 nh\u1ecf ph\u00f9 h\u1ee3p \u0111\u01b0\u1ee3c.<\/p>\n

K\u00edch th\u01b0\u1edbc c\u1ee7a h\u1ed9p \u0111i\u1ec7n ki\u1ec3u \u0111\u01a1n gang th\u01b0\u1eddng l\u00e0 bao nhi\u00eau?<\/h2>\n

\u0110\u1ec3 tham kh\u1ea3o h\u1eefu \u00edch cho B\u1eafc M\u1ef9, b\u1ea3ng NEC \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y trong C\u00e1c quy \u0111\u1ecbnh v\u1ec1 N\u0103ng l\u01b0\u1ee3ng M\u1eb7t Tr\u1eddi Qu\u1ed1c t\u1ebf c\u1ee7a ICC n\u0103m 2021, M\u1ee5c 314.16<\/a> Danh s\u00e1ch n\u00e0y li\u1ec7t k\u00ea m\u1ed9t s\u1ed1 h\u1ed9p \u0111\u1ef1ng thi\u1ebft b\u1ecb b\u1eb1ng kim lo\u1ea1i h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n l\u00e0 3 \u00d7 2 inch. Kh\u1ed1i l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea c\u1ee7a ch\u00fang kh\u00e1c nhau theo \u0111\u1ed9 s\u00e2u. \u0110\u00e2y l\u00e0 c\u00e1c v\u00ed d\u1ee5 t\u1eeb b\u1ea3ng \u0111\u00f3, kh\u00f4ng ph\u1ea3i l\u00e0 k\u00edch th\u01b0\u1edbc hay c\u00f4ng su\u1ea5t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh cho t\u1eebng s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c b\u00e1n d\u01b0\u1edbi d\u1ea1ng m\u1ed9t gang.<\/p>\n\n\n\n\n\n\n\n
K\u00edch th\u01b0\u1edbc b\u1ea3ng danh ngh\u0129a<\/th>\nKh\u1ed1i l\u01b0\u1ee3ng giao d\u1ecbch ni\u00eam y\u1ebft<\/th>\nNh\u1eefng g\u00ec so s\u00e1nh cho th\u1ea5y<\/th>\n<\/tr>\n<\/thead>\n
3 \u00d7 2 \u00d7 1\u00bd inch<\/td>\n7,5 inch kh\u1ed1i<\/td>\nM\u1ed9t h\u1ed9p h\u1eb9p cung c\u1ea5p kh\u00f4ng gian n\u1ed1i d\u00e2y t\u01b0\u01a1ng \u0111\u1ed1i \u00edt.<\/td>\n<\/tr>\n
3 \u00d7 2 \u00d7 2 inch<\/td>\n10,0 inch kh\u1ed1i<\/td>\nM\u1ee9c dung t\u00edch c\u1ee7a c\u00f9ng m\u1ed9t k\u00edch th\u01b0\u1edbc m\u1eb7t b\u1eb1ng danh ngh\u0129a c\u00f3 th\u1ec3 kh\u00e1c nhau.<\/td>\n<\/tr>\n
3 \u00d7 2 \u00d7 3\u00bd inch<\/td>\n18,0 inch kh\u1ed1i<\/td>\nVi\u1ec7c t\u0103ng \u0111\u1ed9 s\u00e2u s\u1ebd thay \u0111\u1ed5i \u00e2m l\u01b0\u1ee3ng m\u00e0 kh\u00f4ng c\u1ea7n th\u00eam v\u1ecb tr\u00ed thi\u1ebft b\u1ecb.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

B\u1ed9 s\u01b0u t\u1eadp \u0111\u01b0\u1ee3c tr\u00edch d\u1eabn n\u00e0y t\u00e1i hi\u1ec7n c\u00e1c quy \u0111\u1ecbnh t\u1eeb Quy chu\u1ea9n k\u1ef9 thu\u1eadt qu\u1ed1c gia n\u0103m 2020. Phi\u00ean b\u1ea3n \u0111\u01b0\u1ee3c ban h\u00e0nh t\u1ea1i \u0111\u1ecba ph\u01b0\u01a1ng v\u00e0 c\u00e1c s\u1eeda \u0111\u1ed5i quy \u0111\u1ecbnh v\u1ec1 vi\u1ec7c l\u1eafp \u0111\u1eb7t th\u1ef1c t\u1ebf. \u0110\u1ed1i v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 c\u00f4ng su\u1ea5t \u0111\u01b0\u1ee3c ghi r\u00f5 tr\u00ean nh\u00e3n, vui l\u00f2ng s\u1eed d\u1ee5ng nh\u00e3n v\u00e0 h\u01b0\u1edbng d\u1eabn \u00e1p d\u1ee5ng thay v\u00ec nh\u00e2n c\u00e1c k\u00edch th\u01b0\u1edbc b\u00ean ngo\u00e0i \u0111\u1ec3 \u01b0\u1edbc l\u01b0\u1ee3ng th\u1ec3 t\u00edch s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c.<\/p>\n

L\u1edbp ph\u1ee7 h\u1ed9p v\u00e0 \u0111\u1ed9 s\u00e2u s\u1eed d\u1ee5ng c\u00f3 kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n

L\u1ea5p \u0111\u1ea7y h\u1ed9p \u0111i\u1ec7n<\/strong> \u0110\u00e2y l\u00e0 quy tr\u00ecnh t\u00ednh to\u00e1n d\u1ef1a tr\u00ean c\u00e1c d\u00e2y d\u1eabn v\u00e0 c\u00e1c v\u1eadt d\u1ee5ng kh\u00e1c \u0111\u01b0\u1ee3c t\u00ednh theo quy \u0111\u1ecbnh \u00e1p d\u1ee5ng. Vi\u1ec7c t\u00ednh to\u00e1n c\u00f3 th\u1ec3 bao g\u1ed3m c\u00e1c kho\u1ea3n kh\u1ea5u tr\u1eeb cho c\u00e1c thi\u1ebft b\u1ecb n\u1ed1i d\u00e2y, k\u1eb9p b\u00ean trong v\u00e0 d\u00e2y d\u1eabn n\u1ed1i \u0111\u1ea5t. C\u00e1c v\u1eadt d\u1ee5ng n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n theo c\u00f9ng m\u1ed9t c\u00e1ch th\u1ee9c, v\u00e0 quy \u0111\u1ecbnh v\u1ec1 d\u00e2y d\u1eabn n\u1ed1i \u0111\u1ea5t n\u00ean \u0111\u01b0\u1ee3c ki\u1ec3m tra d\u1ef1a tr\u00ean phi\u00ean b\u1ea3n \u0111\u01b0\u1ee3c th\u00f4ng qua thay v\u00ec ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 \u00e1p d\u1ee5ng quy t\u1eafc chung \u201ct\u1ea5t c\u1ea3 d\u00e2y d\u1eabn \u0111\u1ec1u \u0111\u01b0\u1ee3c t\u00ednh l\u00e0 m\u1ed9t \u0111\u01a1n v\u1ecb\u201d.<\/p>\n

Kho\u1ea3ng c\u00e1ch s\u1eed d\u1ee5ng l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt. M\u1ed9t thi\u1ebft b\u1ecb GFCI c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i ho\u1eb7c c\u00f4ng t\u1eafc th\u00f4ng minh c\u00f3 th\u1ec3 d\u00e0i v\u01b0\u1ee3t qu\u00e1 ph\u1ea7n d\u00e2y n\u1ed1i c\u1ee7a n\u00f3. Vi\u1ec7c l\u1eafp \u0111\u1eb7t d\u00e2y c\u00e1p ph\u00eda sau, th\u00e2n k\u1ebft n\u1ed1i v\u00e0 c\u00e1c kh\u00fac d\u1eabn c\u00f3 th\u1ec3 chi\u1ebfm h\u1ebft kh\u00f4ng gian c\u00f2n l\u1ea1i ngay c\u1ea3 khi t\u00ednh to\u00e1n v\u1ec1 s\u1ed1 li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. Gi\u1ea3i ph\u00e1p l\u00e0 ph\u1ea3i ki\u1ec3m tra c\u1ea3 hai y\u00eau c\u1ea7u n\u00e0y tr\u01b0\u1edbc khi ph\u00ea duy\u1ec7t h\u1ed9p \u0111i\u1ec7n.<\/p>\n

V\u00ed d\u1ee5, m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 th\u00e2n m\u00e1y \u0111i\u1ec7n t\u1eed s\u00e2u v\u00e0 nhi\u1ec1u \u0111\u1ea7u n\u1ed1i c\u00f3 th\u1ec3 c\u1ea7n kh\u00f4ng gian ph\u00eda sau l\u1edbn h\u01a1n so v\u1edbi m\u1ed9t c\u00f4ng t\u1eafc c\u01a1 b\u1ea3n. Kh\u00f4ng gian th\u1eeba \u0111\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi m\u1ed9t h\u1ed9p ph\u00f9 h\u1ee3p ho\u1eb7c m\u1ed9t thi\u1ebft b\u1ecb n\u1ed1i d\u00e0i \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t; vi\u1ec7c bu\u1ed9c thi\u1ebft b\u1ecb v\u00e0o d\u00e2y \u0111i\u1ec7n kh\u00f4ng ph\u1ea3i l\u00e0 gi\u1ea3i ph\u00e1p thay th\u1ebf kh\u1ea3 thi. H\u01b0\u1edbng d\u1eabn k\u00edch th\u01b0\u1edbc h\u1ed9p \u0111i\u1ec7n<\/a> gi\u1ea3i th\u00edch m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa c\u00e1c k\u00edch th\u01b0\u1edbc b\u00ean ngo\u00e0i, k\u00edch th\u01b0\u1edbc l\u1eafp \u0111\u1eb7t v\u00e0 kh\u00f4ng gian s\u1eed d\u1ee5ng.<\/p>\n

Li\u1ec7u m\u1ed9t h\u1ed9p s\u00e2u h\u01a1n c\u00f3 th\u1ec3 v\u1eeba v\u1edbi t\u01b0\u1eddng v\u00e0 \u0111\u01b0\u1eddng d\u1eabn c\u00e1p kh\u00f4ng?<\/h2>\n

M\u1ed9t h\u1ed9p s\u00e2u h\u01a1n c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft m\u1ed9t h\u1ea1n ch\u1ebf trong khi t\u1ea1o ra m\u1ed9t h\u1ea1n ch\u1ebf kh\u00e1c. Ki\u1ec3m tra \u0111\u1ed9 s\u00e2u c\u1ee7a khoang, c\u1ea5u tr\u00fac khung, c\u00e1c khe h\u1edf trong t\u01b0\u1eddng v\u00e0 v\u1ecb tr\u00ed c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng \u1ed1ng ho\u1eb7c v\u1eadt c\u00e1ch nhi\u1ec7t. \u0110\u1ed1i v\u1edbi m\u1ed9t b\u1ee9c t\u01b0\u1eddng \u0111\u00e3 c\u00f3 s\u1eb5n, ph\u01b0\u01a1ng ph\u00e1p c\u1ed1 \u0111\u1ecbnh v\u00e0 \u0111\u1ed9 d\u00e0y t\u01b0\u1eddng cho ph\u00e9p c\u0169ng quan tr\u1ecdng kh\u00f4ng k\u00e9m so v\u1edbi \u0111\u1ed9 s\u00e2u. \u0110\u1ed1i v\u1edbi c\u00e1ch l\u1eafp \u0111\u1eb7t tr\u00ean b\u1ec1 m\u1eb7t, h\u00e3y t\u00ednh \u0111\u1ebfn \u0111\u1ed9 nghi\u00eang c\u1ee7a t\u01b0\u1eddng v\u00e0o trong ph\u00f2ng v\u00e0 v\u1ecb tr\u00ed c\u1ee7a l\u1ed1i v\u00e0o.<\/p>\n

Ngo\u00e0i ra, h\u00e3y ki\u1ec3m tra xem c\u00e1c d\u00e2y c\u00e1p th\u1ef1c s\u1ef1 \u0111i v\u00e0o t\u1eeb \u0111\u00e2u. Hai h\u1ed9p c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 t\u01b0\u01a1ng t\u1ef1 c\u00f3 th\u1ec3 t\u1ea1o ra kh\u00f4ng gian kh\u00e1c nhau xung quanh thi\u1ebft b\u1ecb v\u00ec c\u00e1c k\u1eb9p v\u00e0 l\u1ed7 c\u1eafm c\u1ee7a ch\u00fang chi\u1ebfm v\u1ecb tr\u00ed kh\u00e1c nhau. Vi\u1ec7c xem x\u00e9t b\u1ea3n v\u1ebd n\u00ean bao g\u1ed3m c\u1ea3 ph\u1ea7n chi\u1ebfu r\u1ecdi c\u1ee7a \u0111\u1ea7u n\u1ed1i, kho\u1ea3ng tr\u1ed1ng do u\u1ed1n cong v\u00e0 \u0111\u01b0\u1eddng d\u1eabn c\u1ee7a d\u00e2y c\u00e1p, thay v\u00ec ch\u1ec9 xem x\u00e9t k\u00edch th\u01b0\u1edbc c\u1ee7a h\u1ed9p tr\u1ed1ng.<\/p>\n

C\u00f3 th\u1ec3 m\u1ed9t h\u1ed9p k\u1ebft n\u1ed1i thay th\u1ebf cho h\u1ed9p thi\u1ebft b\u1ecb m\u1ed9t gang kh\u00f4ng?<\/h2>\n

C\u1ea5u tr\u00fac k\u1ebft n\u1ed1i v\u00e0 h\u1ed9p thi\u1ebft b\u1ecb gi\u1ea3i quy\u1ebft c\u00e1c nhi\u1ec7m v\u1ee5 l\u1eafp \u0111\u1eb7t kh\u00e1c nhau. H\u1ed9p k\u1ebft n\u1ed1i cung c\u1ea5p m\u1ed9t c\u1ea5u tr\u00fac \u0111\u1ec3 k\u1ebft n\u1ed1i; h\u1ed9p thi\u1ebft b\u1ecb c\u0169ng ph\u1ea3i h\u1ed7 tr\u1ee3 c\u00f4ng t\u1eafc ho\u1eb7c \u1ed5 c\u1eafm d\u1ef1 \u0111\u1ecbnh v\u00e0 n\u1eafp \u0111\u1eady c\u1ee7a n\u00f3. M\u1ed9t c\u1ea5u tr\u00fac l\u1edbn h\u01a1n kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb, v\u00e0 tuy\u00ean b\u1ed1 ch\u1ed1ng th\u1ea5m n\u01b0\u1edbc c\u0169ng kh\u00f4ng \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi ph\u1ee5 ki\u1ec7n d\u00e2y \u0111i\u1ec7n.<\/p>\n

Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u y\u00eau c\u1ea7u c\u00e1c b\u01b0\u1edbc ki\u1ec3m tra ri\u00eang v\u1ec1 n\u1ed1i \u0111\u1ea5t v\u00e0 l\u1eafp \u0111\u1eb7t. \u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 v\u1ea5n \u0111\u1ec1 n\u00e0y, vui l\u00f2ng tham kh\u1ea3o ph\u1ea7n So s\u00e1nh h\u1ed9p n\u1ed1i b\u1eb1ng nh\u1ef1a v\u00e0 kim lo\u1ea1i<\/a>. V\u1eadt li\u1ec7u n\u00e0y kh\u00f4ng lo\u1ea1i b\u1ecf s\u1ef1 c\u1ea7n thi\u1ebft ph\u1ea3i x\u00e1c minh v\u1ec1 h\u1ed7 tr\u1ee3, c\u00e1c \u0111\u1ea7u n\u1ed1i c\u00e1p v\u00e0 c\u00e1c y\u00eau c\u1ea7u c\u1ee7a th\u1ecb tr\u01b0\u1eddng \u0111\u00edch.<\/p>\n

\"Vi\u1ec7c
H\u00e3y so s\u00e1nh ch\u1ee9c n\u0103ng bao b\u1ecdc d\u1ef1 \u0111\u1ecbnh c\u0169ng nh\u01b0 k\u00edch th\u01b0\u1edbc c\u1ee7a n\u00f3.<\/figcaption><\/figure>\n

C\u00f3 nh\u1eefng \u0111i\u1ec1u c\u1ea7n ki\u1ec3m tra tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng c\u00e1c h\u1ed9p thay th\u1ebf kh\u00f4ng?<\/h2>\n
    \n
  1. X\u00e1c \u0111\u1ecbnh thi\u1ebft b\u1ecb v\u00e0 h\u1ec7 th\u1ed1ng g\u1eafn k\u1ebft khu v\u1ef1c, bao g\u1ed3m c\u1ea3 n\u1eafp \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/li>\n
  2. H\u00e3y ghi l\u1ea1i k\u00edch th\u01b0\u1edbc b\u00ean ngo\u00e0i, ki\u1ec3u k\u1ebft c\u1ea5u, \u0111\u1ed9 m\u1edf t\u01b0\u1eddng v\u00e0 \u0111\u1ed9 s\u00e2u l\u1eafp \u0111\u1eb7t s\u1eb5n c\u00f3.<\/li>\n
  3. T\u00ednh kh\u1ed1i l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft theo m\u00e3 s\u1ed1 \u00e1p d\u1ee5ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c d\u00e2y d\u1eabn v\u00e0 ph\u1ee5 ki\u1ec7n th\u1ef1c t\u1ebf.<\/li>\n
  4. Ki\u1ec3m tra \u0111\u1ed9 th\u00f4ng tho\u00e1ng c\u1ee7a th\u00e2n thi\u1ebft b\u1ecb v\u00e0 l\u1ed1i \u0111i c\u1ee7a d\u00e2y c\u00e1p tr\u00ean b\u1ea3n v\u1ebd k\u00edch th\u01b0\u1edbc ho\u1eb7c m\u1ed9t b\u1ed9 l\u1eafp r\u00e1p m\u1eabu \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/li>\n
  5. X\u00e1c nh\u1eadn v\u1ec1 v\u1eadt li\u1ec7u, c\u00e1c quy \u0111\u1ecbnh v\u1ec1 n\u1ed1i \u0111\u1ea5t, kh\u1ea3 n\u0103ng ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng v\u00e0 b\u1ea5t k\u1ef3 ph\u00ea duy\u1ec7t s\u1ea3n ph\u1ea9m n\u00e0o c\u1ea7n thi\u1ebft cho m\u1eabu s\u1ea3n ph\u1ea9m c\u1ee5 th\u1ec3.<\/li>\n<\/ol>\n

    \u0110i\u1ec1u n\u00e0y ph\u00e2n t\u00e1ch K\u00edch th\u01b0\u1edbc h\u1ed9p m\u1ed9t gang<\/strong> V\u1ec1 c\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch c\u0169ng quan tr\u1ecdng kh\u00f4ng k\u00e9m. \u0110\u1ed1i v\u1edbi \u0111\u01a1n \u0111\u1eb7t h\u00e0ng th\u01b0\u01a1ng m\u1ea1i, b\u1ea3n v\u1ebd v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t n\u00ean \u0111\u01b0\u1ee3c l\u01b0u l\u1ea1i c\u00f9ng v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt mua h\u00e0ng \u0111\u1ec3 c\u00f3 th\u1ec3 xem x\u00e9t thay th\u1ebf sau n\u00e0y theo c\u00e1c y\u00eau c\u1ea7u t\u01b0\u01a1ng t\u1ef1.<\/p>\n

    \n

    Ng\u01b0\u1eddi mua n\u00ean bi\u1ebft th\u00eam nh\u1eefng g\u00ec v\u1ec1 c\u00e1c h\u1ed9p c\u00f3 m\u1ed9t gang?<\/h2>\n

    C\u00e1c h\u1ed9p \u0111i\u1ec7n ki\u1ec3u gang \u0111\u01a1n c\u00f3 c\u00f9ng k\u00edch th\u01b0\u1edbc kh\u00f4ng?<\/h3>\n

    Kh\u00f4ng. Ch\u00fang cung c\u1ea5p m\u1ed9t v\u1ecb tr\u00ed cho thi\u1ebft b\u1ecb, nh\u01b0ng k\u00edch th\u01b0\u1edbc, kho\u1ea3ng c\u00e1ch v\u00edt, \u0111\u1ed9 s\u00e2u v\u00e0 c\u00e1ch b\u1ed1 tr\u00ed \u0111\u1ea7u v\u00e0o s\u1ebd kh\u00e1c nhau t\u00f9y theo s\u1ea3n ph\u1ea9m v\u00e0 h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t. Ph\u00f9 h\u1ee3p thi\u1ebft b\u1ecb v\u00e0 n\u1eafp v\u1edbi h\u1ed9p ch\u00ednh x\u00e1c.<\/p>\n

    M\u1ed9t h\u1ed9p c\u00f3 m\u1ed9t gang lu\u00f4n c\u00f3 dung t\u00edch l\u00e0 18 inch kh\u1ed1i kh\u00f4ng?<\/h3>\n

    Kh\u00f4ng. Dung t\u00edch 18 inch l\u00e0 dung t\u00edch \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea cho t\u1eebng k\u00edch th\u01b0\u1edbc h\u1ed9p c\u1ee5 th\u1ec3, kh\u00f4ng ph\u1ea3i l\u00e0 dung t\u00edch chung cho to\u00e0n b\u1ed9 c\u00e1c lo\u1ea1i h\u1ed9p. H\u00e3y \u0111\u1ecdc nh\u00e3n tr\u00ean h\u1ed9p ho\u1eb7c tham kh\u1ea3o b\u1ea3ng th\u00f4ng s\u1ed1 ti\u00eau chu\u1ea9n.<\/p>\n

    C\u1ea7n \u0111\u1eb7t h\u1ed9p \u1edf \u0111\u1ed9 s\u00e2u n\u00e0o \u0111\u1ec3 l\u1eafp \u0111\u01b0\u1ee3c c\u00f4ng t\u1eafc th\u00f4ng minh?<\/h3>\n

    H\u00e3y s\u1eed d\u1ee5ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 k\u00edch th\u01b0\u1edbc h\u1ed9p t\u1ed1i thi\u1ec3u c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 ki\u1ec3m tra kh\u00f4ng gian d\u00e0nh cho c\u00e1c d\u00e2y d\u1eabn v\u00e0 \u0111\u1ea7u n\u1ed1i th\u1ef1c t\u1ebf. Ch\u1ec9 ri\u00eang chi\u1ec1u s\u00e2u ti\u00eau chu\u1ea9n kh\u00f4ng th\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ed9t c\u00f4ng t\u1eafc th\u00f4ng minh s\u1ebd ph\u00f9 h\u1ee3p.<\/p>\n

    Li\u1ec7u m\u1ed9t h\u1ed9p s\u00e2u h\u01a1n c\u00f3 lu\u00f4n lu\u00f4n t\u00ednh to\u00e1n l\u1ea5p \u0111\u1ea7y kh\u00f4ng?<\/h3>\n

    Kh\u00f4ng. M\u1ed9t m\u00f4 h\u00ecnh s\u00e2u h\u01a1n c\u00f3 th\u1ec3 cung c\u1ea5p nhi\u1ec1u kh\u00f4ng gian h\u01a1n, nh\u01b0ng dung l\u01b0\u1ee3ng c\u1ee7a n\u00f3 v\u1eabn ph\u1ea3i \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u t\u00ednh to\u00e1n \u00e1p d\u1ee5ng cho thi\u1ebft b\u1ecb \u0111\u00f3. Vi\u1ec7c ki\u1ec3m tra \u0111\u1ed9 th\u00f4ng tho\u00e1ng c\u1ee7a thi\u1ebft b\u1ecb ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n ri\u00eang bi\u1ec7t.<\/p>\n

    Li\u1ec7u m\u1ed9t v\u00f2ng m\u1edf r\u1ed9ng c\u00f3 th\u1ec3 t\u0103ng th\u00eam th\u1ec3 t\u00edch h\u1ed9p s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c kh\u00f4ng?<\/h3>\n

    M\u1ed9t chi\u1ebfc v\u00f2ng ph\u00f9 h\u1ee3p c\u00f3 th\u1ec3 t\u1ea1o ra s\u1ef1 t\u0103ng \u00e2m l\u01b0\u1ee3ng theo c\u00e1c quy \u0111\u1ecbnh \u00e1p d\u1ee5ng khi kh\u1ea3 n\u0103ng ch\u1ee9a v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. H\u00e3y ki\u1ec3m tra v\u00f2ng, h\u1ed9p, thi\u1ebft b\u1ecb h\u1ed7 tr\u1ee3 v\u00e0 c\u00e1ch b\u1ed1 tr\u00ed t\u01b0\u1eddng ho\u00e0n ch\u1ec9nh c\u00f9ng nhau, thay v\u00ec cho r\u1eb1ng b\u1ea5t k\u1ef3 b\u1ed9 ph\u1eadn ph\u00e2n c\u00e1ch n\u00e0o c\u0169ng s\u1ebd t\u1ea1o ra s\u1ef1 t\u0103ng \u00e2m l\u01b0\u1ee3ng cho ph\u00e9p.<\/p>\n

    Li\u1ec7u h\u1ed9p gang \u0111\u01a1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 k\u1ebft n\u1ed1i thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i kh\u00f4ng?<\/h3>\n

    Ch\u1ec9 khi h\u1ed9p, ph\u1ee5 ki\u1ec7n, h\u1ec7 th\u1ed1ng d\u00e2y d\u1eabn v\u00e0 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u l\u1eafp \u0111\u1eb7t th\u00ec m\u1edbi \u0111\u01b0\u1ee3c coi l\u00e0 ph\u00f9 h\u1ee3p. M\u1ed9t h\u1ed9p ph\u00f9 h\u1ee3p \u0111\u1ec3 n\u1ed1i ti\u1ebfp kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi m\u1ed9t thi\u1ebft b\u1ecb ho\u1eb7c v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t c\u1ee5 th\u1ec3 n\u00e0o \u0111\u00f3.<\/p>\n<\/section>\n

    Tham kh\u1ea3o<\/h2>\n
      \n
    1. M\u00e3 s\u1ed1 k\u1ef9 thu\u1eadt s\u1ed1 c\u1ee7a ICC: 2021 ISEP, M\u1ee5c 314.16 c\u1ee7a NEC, quy \u0111\u1ecbnh v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 ch\u1ea5t \u0111i\u1ec7n ph\u00e2n<\/a> \u2014 B\u1ea3n sao c\u00f4ng khai c\u1ee7a c\u00e1c quy \u0111\u1ecbnh c\u1ee7a NEC n\u0103m 2020.<\/li>\n
    2. NFPA 70, B\u1ed9 lu\u1eadt \u0111i\u1ec7n qu\u1ed1c gia: th\u00f4ng tin v\u1ec1 ti\u00eau chu\u1ea9n v\u00e0 \u1ea5n b\u1ea3n ch\u00ednh th\u1ee9c<\/a> \u2014 s\u1eed d\u1ee5ng phi\u00ean b\u1ea3n \u0111\u01b0\u1ee3c th\u00f4ng qua cho d\u1ef1 \u00e1n.<\/li>\n<\/ol>\n

      L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn \u0111\u01b0\u1ee3c k\u00edch th\u01b0\u1edbc h\u1ed9p cu\u1ed1i c\u00f9ng?<\/h2>\n

      H\u1ed9p \u0111\u00fang l\u00e0 lo\u1ea1i \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c c\u1ea3 h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t, t\u00ednh to\u00e1n kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 kh\u00f4ng gian d\u00e2y \u0111i\u1ec7n. B\u1eaft \u0111\u1ea7u t\u1eeb thi\u1ebft b\u1ecb v\u00e0 v\u1ecf b\u1ecdc, x\u00e1c \u0111\u1ecbnh c\u00e1c r\u00e0ng bu\u1ed9c v\u1ec1 t\u01b0\u1eddng v\u00e0 c\u00e1p, sau \u0111\u00f3 so s\u00e1nh b\u1ea3n v\u1ebd h\u1ed9p th\u1ef1c t\u1ebf v\u00e0 c\u00f4ng su\u1ea5t. M\u1ed9t b\u1ea3n v\u1ebd ph\u00f9 h\u1ee3p c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 v\u1ec1 kho\u1ea3ng c\u00e1ch, nh\u01b0ng kh\u00f4ng thay th\u1ebf \u0111\u01b0\u1ee3c vi\u1ec7c t\u00ednh to\u00e1n l\u1ea5p \u0111\u1ea7y \u00e1p d\u1ee5ng ho\u1eb7c vi\u1ec7c ph\u00ea duy\u1ec7t s\u1ea3n ph\u1ea9m. \u0110\u1eb7c bi\u1ec7t, \u0111\u1eebng coi m\u1ed9t thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i l\u1edbn l\u00e0 h\u1ed9p \u1ed5 c\u1eafm t\u01b0\u01a1ng th\u00edch ch\u1ec9 v\u00ec c\u00f3 nhi\u1ec1u kh\u00f4ng gian b\u00ean trong. \u0110\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n k\u1ebft n\u1ed1i-\u1ed5 c\u1eafm, CHAC Gi\u1ea3i ph\u00e1p h\u1ed9p ph\u00e2n ph\u1ed1i v\u00e0 h\u1ed9p n\u1ed1i<\/strong><\/a> Cung c\u1ea5p m\u1ed9t tham chi\u1ebfu s\u1ea3n ph\u1ea9m ri\u00eang bi\u1ec7t; x\u00e1c nh\u1eadn v\u1ec1 c\u00e1ch l\u1eafp \u0111\u1eb7t v\u00e0 ch\u1ee9c n\u0103ng d\u1ef1 \u0111\u1ecbnh tr\u01b0\u1edbc khi \u0111\u01b0a s\u1ea3n ph\u1ea9m v\u00e0o danh s\u00e1ch th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt.<\/p>","protected":false},"excerpt":{"rendered":"

      So s\u00e1nh k\u00edch th\u01b0\u1edbc, \u0111\u1ed9 s\u00e2u, kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 kh\u1ea3 n\u0103ng ph\u00f9 h\u1ee3p c\u1ee7a h\u1ed9p \u0111i\u1ec7n m\u1ed9t gang v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n NEC, IEC v\u00e0 RFQ d\u00e0nh cho c\u00e1c nh\u00e0 mua d\u1ef1 \u00e1n B2B.<\/p>","protected":false},"author":1,"featured_media":3886,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3860","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"acf":[],"_links":{"self":[{"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/posts\/3860","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/comments?post=3860"}],"version-history":[{"count":5,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/posts\/3860\/revisions"}],"predecessor-version":[{"id":4913,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/posts\/3860\/revisions\/4913"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/media\/3886"}],"wp:attachment":[{"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/media?parent=3860"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/categories?post=3860"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/tags?post=3860"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}