{"id":20962,"date":"2025-12-24T08:46:51","date_gmt":"2025-12-24T00:46:51","guid":{"rendered":"https:\/\/viox.com\/?p=20962"},"modified":"2025-12-24T08:46:54","modified_gmt":"2025-12-24T00:46:54","slug":"cable-size-types-mm-awg-bs-conversion-guide","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/cable-size-types-mm-awg-bs-conversion-guide\/","title":{"rendered":"T\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c lo\u1ea1i k\u00edch th\u01b0\u1edbc c\u00e1p | mm, mm2, B&S, AWG"},"content":{"rendered":"
\n

Gi\u1edbi thi\u1ec7u: T\u1ea1i sao k\u00edch th\u01b0\u1edbc c\u00e1p l\u1ea1i quan tr\u1ecdng<\/h2>\n

Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00fang k\u00edch th\u01b0\u1edbc c\u00e1p kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t th\u1ee7 t\u1ee5c k\u1ef9 thu\u1eadt\u2014m\u00e0 l\u00e0 m\u1ed9t quy\u1ebft \u0111\u1ecbnh an to\u00e0n quan tr\u1ecdng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ecdi c\u00f4ng tr\u00ecnh l\u1eafp \u0111\u1eb7t \u0111i\u1ec7n. Cho d\u00f9 b\u1ea1n \u0111ang \u0111i d\u00e2y cho m\u1ed9t t\u00f2a nh\u00e0 d\u00e2n c\u01b0, thi\u1ebft k\u1ebf m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p hay l\u00ean k\u1ebf ho\u1ea1ch cho m\u1ed9t h\u1ec7 th\u1ed1ng \u0111i\u1ec7n m\u1eb7t tr\u1eddi, di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang c\u1ee7a d\u00e2y d\u1eabn s\u1ebd quy\u1ebft \u0111\u1ecbnh l\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 ch\u1ea1y an to\u00e0n, l\u01b0\u1ee3ng \u0111i\u1ec7n \u00e1p s\u1ebd b\u1ecb m\u1ea5t theo kho\u1ea3ng c\u00e1ch v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n s\u1ebd ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady hay tr\u1edf th\u00e0nh nguy c\u01a1 h\u1ecfa ho\u1ea1n.<\/p>\n

C\u00e1c chuy\u00ean gia \u0111i\u1ec7n tr\u00ean to\u00e0n th\u1ebf gi\u1edbi s\u1eed d\u1ee5ng c\u00e1c h\u1ec7 th\u1ed1ng \u0111o l\u01b0\u1eddng kh\u00e1c nhau: h\u1ec7 m\u00e9t milim\u00e9t vu\u00f4ng (mm\u00b2)<\/strong> ph\u1ed5 bi\u1ebfn \u1edf Ch\u00e2u \u00c2u v\u00e0 Ch\u00e2u \u00c1, Ti\u00eau chu\u1ea9n American Wire Gauge (AWG)<\/strong> \u1edf B\u1eafc M\u1ef9, v\u00e0 Ti\u00eau chu\u1ea9n Anh (B&S)<\/strong> h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong c\u00e1c c\u00e0i \u0111\u1eb7t c\u0169 v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3. S\u1ef1 nh\u1ea7m l\u1eabn gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c gi\u1ea3m k\u00edch th\u01b0\u1edbc nguy hi\u1ec3m ho\u1eb7c t\u0103ng k\u00edch th\u01b0\u1edbc t\u1ed1n k\u00e9m. H\u01b0\u1edbng d\u1eabn n\u00e0y lo\u1ea1i b\u1ecf s\u1ef1 ph\u1ee9c t\u1ea1p, cung c\u1ea5p c\u00e1c gi\u1ea3i th\u00edch r\u00f5 r\u00e0ng, b\u1ea3ng chuy\u1ec3n \u0111\u1ed5i th\u1ef1c t\u1ebf v\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p c\u00f3 h\u1ec7 th\u1ed1ng \u0111\u1ec3 \u0111\u1ecbnh c\u1ee1 c\u00e1p \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf nh\u01b0 IEC 60228, NEC Ch\u01b0\u01a1ng 9 v\u00e0 BS 7211.<\/p>\n

B\u1eb1ng c\u00e1ch hi\u1ec3u c\u00e1c lo\u1ea1i k\u00edch th\u01b0\u1edbc c\u00e1p, b\u1ea1n s\u1ebd \u0111\u01b0a ra c\u00e1c quy\u1ebft \u0111\u1ecbnh s\u00e1ng su\u1ed1t \u0111\u1ec3 c\u00e2n b\u1eb1ng gi\u1eefa an to\u00e0n, hi\u1ec7u qu\u1ea3 v\u00e0 chi ph\u00ed\u2014cho d\u00f9 b\u1ea1n \u0111ang thay th\u1ebf m\u1ed9t \u0111o\u1ea1n b\u1ecb h\u1ecfng, m\u1edf r\u1ed9ng m\u1ea1ch hay thi\u1ebft k\u1ebf t\u1eeb \u0111\u1ea7u.<\/p>\n

H\u1ec7 th\u1ed1ng Milim\u00e9t (mm) v\u00e0 Milim\u00e9t vu\u00f4ng (mm\u00b2)<\/h2>\n

H\u1ec7 m\u00e9t \u0111o k\u00edch th\u01b0\u1edbc c\u00e1p theo hai c\u00e1ch li\u00ean quan nh\u01b0ng kh\u00e1c bi\u1ec7t: milim\u00e9t (mm)<\/strong> cho \u0111\u01b0\u1eddng k\u00ednh v\u00e0 milim\u00e9t vu\u00f4ng (mm\u00b2)<\/strong> cho di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang. Trong khi mm cho b\u1ea1n bi\u1ebft chi\u1ec1u r\u1ed9ng v\u1eadt l\u00fd c\u1ee7a d\u00e2y d\u1eabn, th\u00ec mm\u00b2 cho b\u1ea1n bi\u1ebft l\u01b0\u1ee3ng \u0111\u1ed3ng th\u1ef1c t\u1ebf c\u00f3 s\u1eb5n \u0111\u1ec3 mang d\u00f2ng \u0111i\u1ec7n\u2014\u0111i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt quan tr\u1ecdng h\u01a1n cho thi\u1ebft k\u1ebf \u0111i\u1ec7n.<\/p>\n

T\u1ea1i sao mm\u00b2 quan tr\u1ecdng h\u01a1n \u0111\u01b0\u1eddng k\u00ednh<\/h3>\n

H\u00e3y ngh\u0129 \u0111\u1ebfn n\u01b0\u1edbc ch\u1ea3y qua m\u1ed9t \u0111\u01b0\u1eddng \u1ed1ng: \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a \u1ed1ng (mm) r\u1ea5t quan tr\u1ecdng, nh\u01b0ng \u0111i\u1ec1u th\u1ef1c s\u1ef1 quy\u1ebft \u0111\u1ecbnh kh\u1ea3 n\u0103ng l\u01b0u l\u01b0\u1ee3ng l\u00e0 di\u1ec7n t\u00edch b\u00ean trong (mm\u00b2). T\u01b0\u01a1ng t\u1ef1, kh\u1ea3 n\u0103ng mang d\u00f2ng \u0111i\u1ec7n c\u1ee7a c\u00e1p ch\u1ee7 y\u1ebfu ph\u1ee5 thu\u1ed9c v\u00e0o di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang c\u1ee7a n\u00f3, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a n\u00f3. Hai c\u00e1p c\u00f3 c\u00f9ng \u0111\u01b0\u1eddng k\u00ednh c\u00f3 th\u1ec3 c\u00f3 di\u1ec7n t\u00edch kh\u00e1c nhau n\u1ebfu m\u1ed9t c\u00e1p s\u1eed d\u1ee5ng \u0111\u1ed3ng \u0111\u1eb7c v\u00e0 c\u00e1p kia s\u1eed d\u1ee5ng d\u00e2y d\u1eabn b\u1ec7n c\u00f3 khe h\u1edf kh\u00f4ng kh\u00ed.<\/p>\n

\"Technical
H\u00ecnh 1: Ph\u00e2n t\u00edch k\u1ef9 thu\u1eadt m\u1eb7t c\u1eaft ngang c\u1ee7a c\u00e1p, ph\u00e2n bi\u1ec7t tr\u1ef1c quan gi\u1eefa \u0111\u01b0\u1eddng k\u00ednh d\u00e2y d\u1eabn (mm) v\u00e0 di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang th\u1ef1c t\u1ebf c\u1ee7a \u0111\u1ed3ng (mm\u00b2).<\/figcaption><\/figure>\n

K\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n IEC 60228<\/h3>\n

Ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf IEC 60228:2023<\/strong> x\u00e1c \u0111\u1ecbnh di\u1ec7n t\u00edch d\u00e2y d\u1eabn danh ngh\u0129a cho c\u00e1p c\u00e1ch \u0111i\u1ec7n. C\u00e1c gi\u00e1 tr\u1ecb n\u00e0y dao \u0111\u1ed9ng t\u1eeb 0,5 mm\u00b2 cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec7n t\u1eed nh\u1ecf \u0111\u1ebfn 3.500 mm\u00b2 cho \u0111\u01b0\u1eddng d\u00e2y truy\u1ec1n t\u1ea3i \u0111i\u1ec7n cao th\u1ebf. \u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n trong t\u00f2a nh\u00e0 v\u00e0 c\u00f4ng nghi\u1ec7p, b\u1ea1n s\u1ebd b\u1eaft g\u1eb7p c\u00e1c k\u00edch th\u01b0\u1edbc ph\u1ed5 bi\u1ebfn sau:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Di\u1ec7n t\u00edch danh ngh\u0129a (mm\u00b2)<\/th>\n\u0110i\u1ec3n H\u00ecnh \u1ee8ng D\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n
1,5 mm\u00b2<\/td>\nM\u1ea1ch chi\u1ebfu s\u00e1ng, thi\u1ebft b\u1ecb nh\u1ecf<\/td>\n<\/tr>\n
2,5 mm\u00b2<\/td>\n\u1ed4 c\u1eafm, m\u1ea1ch \u0111i\u1ec7n chung<\/td>\n<\/tr>\n
4 mm\u00b2<\/td>\nM\u1ea1ch nh\u00e0 b\u1ebfp, thi\u1ebft b\u1ecb l\u1edbn h\u01a1n<\/td>\n<\/tr>\n
6 mm\u00b2<\/td>\nM\u1ea1ch b\u1ebfp, \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed<\/td>\n<\/tr>\n
10 mm\u00b2<\/td>\nPh\u00e2n ph\u1ed1i th\u1ee9 c\u1ea5p, thi\u1ebft b\u1ecb l\u1edbn h\u01a1n<\/td>\n<\/tr>\n
16 mm\u00b2<\/td>\nM\u00e1y m\u00f3c ba pha, ph\u00e2n ph\u1ed1i th\u01b0\u01a1ng m\u1ea1i<\/td>\n<\/tr>\n
25 mm\u00b2<\/td>\n\u0110\u1ed9ng c\u01a1 c\u00f4ng nghi\u1ec7p, \u1ed1ng g\u00f3p ch\u00ednh<\/td>\n<\/tr>\n
35 mm\u00b2 tr\u1edf l\u00ean<\/td>\nPh\u00e2n ph\u1ed1i \u0111i\u1ec7n, k\u1ebft n\u1ed1i tr\u1ea1m bi\u1ebfn \u00e1p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a h\u1ec7 m\u00e9t<\/h3>\n
    \n
  • Thang \u0111o tuy\u1ebfn t\u00ednh<\/strong>: T\u0103ng g\u1ea5p \u0111\u00f4i gi\u00e1 tr\u1ecb mm\u00b2 s\u1ebd t\u0103ng g\u1ea5p \u0111\u00f4i di\u1ec7n t\u00edch d\u00e2y d\u1eabn v\u00e0 t\u0103ng g\u1ea7n g\u1ea5p \u0111\u00f4i kh\u1ea3 n\u0103ng d\u00f2ng \u0111i\u1ec7n.<\/li>\n
  • C\u00e1c b\u01b0\u1edbc ti\u00eau chu\u1ea9n h\u00f3a<\/strong>: C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t s\u1ea3n xu\u1ea5t c\u00e1p theo k\u00edch th\u01b0\u1edbc danh ngh\u0129a \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc, \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch gi\u1eefa c\u00e1c nh\u00e0 cung c\u1ea5p.<\/li>\n
  • \u0110\u1ecbnh ngh\u0129a d\u1ef1a tr\u00ean \u0111i\u1ec7n tr\u1edf<\/strong>: Theo IEC 60228, c\u00e1p \u201c2,5 mm\u00b2\u201d ph\u1ea3i \u0111\u00e1p \u1ee9ng \u0111i\u1ec7n tr\u1edf t\u1ed1i \u0111a tr\u00ean m\u1ed7i km (th\u01b0\u1eddng l\u00e0 7,41 \u03a9\/km \u0111\u1ed1i v\u1edbi \u0111\u1ed3ng \u1edf 20\u00b0C), ch\u1ee9 kh\u00f4ng ch\u1ec9 k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u0111i\u1ec7n nh\u1ea5t qu\u00e1n.<\/li>\n<\/ul>\n

    Khi n\u00e0o b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y \u201cmm\u201d thay v\u00ec \u201cmm\u00b2\u201d<\/h3>\n

    Trong m\u1ed9t s\u1ed1 ng\u1eef c\u1ea3nh\u2014\u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1edbi c\u00e1p \u00f4 t\u00f4 ho\u1eb7c c\u00e1p \u1eafc quy\u2014b\u1ea1n c\u00f3 th\u1ec3 b\u1eaft g\u1eb7p c\u00e1c k\u00edch th\u01b0\u1edbc nh\u01b0 \u201cc\u00e1p \u00f4 t\u00f4 6mm\u201d. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn t\u1ed5ng \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i bao g\u1ed3m c\u1ea3 l\u1edbp c\u00e1ch \u0111i\u1ec7n<\/strong>, kh\u00f4ng ph\u1ea3i di\u1ec7n t\u00edch d\u00e2y d\u1eabn. Lu\u00f4n ki\u1ec3m tra m\u1eb7t c\u1eaft ngang th\u1ef1c t\u1ebf c\u1ee7a \u0111\u1ed3ng \u0111\u1ec3 t\u00ednh to\u00e1n d\u00f2ng \u0111i\u1ec7n.<\/p>\n

    H\u1ec7 th\u1ed1ng American Wire Gauge (AWG)<\/h2>\n

    Tr\u00ean kh\u1eafp Hoa K\u1ef3, Canada v\u00e0 ph\u1ea7n l\u1edbn B\u1eafc M\u1ef9, k\u00edch th\u01b0\u1edbc c\u00e1p \u0111i\u1ec7n tu\u00e2n theo Ti\u00eau chu\u1ea9n American Wire Gauge (AWG)<\/strong> h\u1ec7 th\u1ed1ng\u2014m\u1ed9t thang \u0111o logarit trong \u0111\u00f3 c\u00e1c s\u1ed1 l\u1edbn h\u01a1n c\u00f3 ngh\u0129a l\u00e0 d\u00e2y m\u1ecfng h\u01a1n. Kh\u00f4ng gi\u1ed1ng nh\u01b0 ph\u00e9p \u0111o di\u1ec7n t\u00edch tr\u1ef1c ti\u1ebfp c\u1ee7a h\u1ec7 m\u00e9t, c\u00e1c s\u1ed1 AWG b\u1eaft ngu\u1ed3n t\u1eeb c\u00e1c ph\u01b0\u01a1ng ph\u00e1p k\u00e9o d\u00e2y c\u1ee7a th\u1ebf k\u1ef7 19, t\u1ea1o ra m\u1ed9t ti\u00eau chu\u1ea9n ph\u1ea3n tr\u1ef1c gi\u00e1c nh\u01b0ng ch\u00ednh x\u00e1c m\u00e0 c\u00e1c th\u1ee3 \u0111i\u1ec7n \u0111\u00e3 s\u1eed d\u1ee5ng trong nhi\u1ec1u th\u1ebf h\u1ec7.<\/p>\n

    C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a s\u1ed1 AWG: Thang \u0111o ngh\u1ecbch \u0111\u1ea3o<\/h3>\n

    \u0110i\u1ec1u \u0111\u1ea7u ti\u00ean c\u1ea7n hi\u1ec3u v\u1ec1 AWG l\u00e0 m\u1ed1i quan h\u1ec7 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a n\u00f3: AWG 14 d\u00e0y h\u01a1n AWG 20<\/strong>. \u0110i\u1ec1u n\u00e0y xu\u1ea5t ph\u00e1t t\u1eeb \u0111\u1ecbnh ngh\u0129a l\u1ecbch s\u1eed, trong \u0111\u00f3 \u201cgauge\u201d \u0111\u1ec1 c\u1eadp \u0111\u1ebfn s\u1ed1 l\u1ea7n d\u00e2y \u0111\u01b0\u1ee3c k\u00e9o qua khu\u00f4n gi\u1ea3m. D\u00e2y 20 gauge tr\u1ea3i qua 20 l\u1ea7n k\u00e9o, l\u00e0m cho n\u00f3 m\u1ecfng h\u01a1n d\u00e2y 10 gauge ch\u1ec9 c\u1ea7n 10 l\u1ea7n k\u00e9o.<\/p>\n

    Hai quy t\u1eafc th\u1ef1c t\u1ebf gi\u00fap \u0111i\u1ec1u h\u01b0\u1edbng thang \u0111o:<\/p>\n

      \n
    1. Gi\u1ea3m 3, t\u0103ng g\u1ea5p \u0111\u00f4i di\u1ec7n t\u00edch<\/strong>: Di chuy\u1ec3n t\u1eeb AWG 14 sang AWG 11 s\u1ebd t\u0103ng g\u1ea7n g\u1ea5p \u0111\u00f4i di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang v\u00e0 kh\u1ea3 n\u0103ng d\u00f2ng \u0111i\u1ec7n.<\/li>\n
    2. Gi\u1ea3m 6, t\u0103ng g\u1ea5p \u0111\u00f4i \u0111\u01b0\u1eddng k\u00ednh<\/strong>: \u0110i t\u1eeb AWG 12 sang AWG 6 s\u1ebd t\u0103ng g\u1ea7n g\u1ea5p \u0111\u00f4i chi\u1ec1u r\u1ed9ng v\u1eadt l\u00fd.<\/li>\n<\/ol>\n

      K\u00edch th\u01b0\u1edbc AWG v\u00e0 \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n<\/h3>\n

      D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng tham kh\u1ea3o hi\u1ec3n th\u1ecb c\u00e1c k\u00edch th\u01b0\u1edbc AWG ph\u1ed5 bi\u1ebfn v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb t\u01b0\u01a1ng \u0111\u01b0\u01a1ng theo h\u1ec7 m\u00e9t v\u00e0 \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n \u0111i\u1ec3n h\u00ecnh. L\u01b0u \u00fd r\u1eb1ng c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n th\u1ef1c t\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ecbnh m\u1ee9c nhi\u1ec7t \u0111\u1ed9 c\u00e1ch \u0111i\u1ec7n, m\u00f4i tr\u01b0\u1eddng l\u1eafp \u0111\u1eb7t (kh\u00f4ng kh\u00ed t\u1ef1 do so v\u1edbi \u1ed1ng d\u1eabn) v\u00e0 c\u00e1c quy t\u1eafc \u0111\u1ecba ph\u01b0\u01a1ng nh\u01b0 B\u1ed9 lu\u1eadt \u0110i\u1ec7n Qu\u1ed1c gia (NEC)<\/strong>.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      C\u1ee1 AWG<\/th>\n\u0110\u01b0\u1eddng k\u00ednh (mm)<\/th>\nDi\u1ec7n t\u00edch (mm\u00b2)<\/th>\n\u0110\u1ecbnh m\u1ee9c NEC (60\u00b0C Cu)<\/th>\n\u0110\u1ecbnh m\u1ee9c trong kh\u00f4ng kh\u00ed t\u1ef1 do (90\u00b0C Cu)<\/th>\n<\/tr>\n<\/thead>\n
      14 AWG<\/td>\n1.63<\/td>\n2.08<\/td>\n15 A<\/td>\n32 A<\/td>\n<\/tr>\n
      12 AWG<\/td>\n2.05<\/td>\n3.31<\/td>\n20 A<\/td>\n41 A<\/td>\n<\/tr>\n
      10 AWG<\/td>\n2.59<\/td>\n5.26<\/td>\n30 A<\/td>\n55 A<\/td>\n<\/tr>\n
      8 AWG<\/td>\n3.26<\/td>\n8.37<\/td>\n40 A<\/td>\n73 A<\/td>\n<\/tr>\n
      6 AWG<\/td>\n4.12<\/td>\n13.30<\/td>\n55 A<\/td>\n101 A<\/td>\n<\/tr>\n
      4 AWG<\/td>\n5.19<\/td>\n21.15<\/td>\n70 A<\/td>\n135 A<\/td>\n<\/tr>\n
      2 AWG<\/td>\n6.54<\/td>\n33.62<\/td>\n95 A<\/td>\n181 A<\/td>\n<\/tr>\n
      1\/0AWG<\/td>\n8.25<\/td>\n53.49<\/td>\n125 A<\/td>\n245 A<\/td>\n<\/tr>\n
      4\/0 AWG<\/td>\n11.68<\/td>\n107.22<\/td>\n195 A<\/td>\n380 A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      V\u01b0\u1ee3t ra ngo\u00e0i AWG: kcmil v\u00e0 MCM<\/h3>\n

      \u0110\u1ed1i v\u1edbi d\u00e2y d\u1eabn l\u1edbn h\u01a1n 4\/0 AWG (0000), h\u1ec7 th\u1ed1ng chuy\u1ec3n sang ngh\u00ecn circular mil (kcmil ho\u1eb7c MCM)<\/strong>. M\u1ed9t circular mil l\u00e0 di\u1ec7n t\u00edch c\u1ee7a m\u1ed9t h\u00ecnh tr\u00f2n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh m\u1ed9t mil (0,001 inch). C\u00e1c k\u00edch th\u01b0\u1edbc kcmil ph\u1ed5 bi\u1ebfn bao g\u1ed3m 250 kcmil, 500 kcmil v\u00e0 750 kcmil, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho l\u1ed1i v\u00e0o d\u1ecbch v\u1ee5, b\u1ed9 c\u1ea5p li\u1ec7u c\u00f4ng nghi\u1ec7p v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng d\u00f2ng \u0111i\u1ec7n cao.<\/p>\n

      T\u1ea1i sao AWG v\u1eabn t\u1ed3n t\u1ea1i \u1edf B\u1eafc M\u1ef9<\/h3>\n

      B\u1ea5t ch\u1ea5p s\u1ef1 thay \u0111\u1ed5i to\u00e0n c\u1ea7u theo h\u01b0\u1edbng ti\u00eau chu\u1ea9n h\u1ec7 m\u00e9t, AWG v\u1eabn \u0103n s\u00e2u v\u00e0o th\u1ef1c ti\u1ec5n \u0111i\u1ec7n \u1edf B\u1eafc M\u1ef9. C\u00e1c b\u1ea3ng NEC, danh m\u1ee5c c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 \u0111\u00e0o t\u1ea1o th\u01b0\u01a1ng m\u1ea1i \u0111\u1ec1u s\u1eed d\u1ee5ng AWG, t\u1ea1o ra m\u1ed9t hi\u1ec7u \u1ee9ng m\u1ea1ng l\u01b0\u1edbi m\u1ea1nh m\u1ebd. Khi l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c t\u00f2a nh\u00e0 ho\u1eb7c thi\u1ebft b\u1ecb hi\u1ec7n c\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo ti\u00eau chu\u1ea9n c\u1ee7a Hoa K\u1ef3, vi\u1ec7c hi\u1ec3u AWG l\u00e0 \u0111i\u1ec1u kh\u00f4ng th\u1ec3 th\u01b0\u01a1ng l\u01b0\u1ee3ng.<\/p>\n

      Ti\u00eau chu\u1ea9n Anh (B&S) v\u00e0 H\u1ec7 th\u1ed1ng SWG<\/h2>\n

      \u1ede V\u01b0\u01a1ng qu\u1ed1c Anh, \u00dac, New Zealand v\u00e0 m\u1ed9t s\u1ed1 qu\u1ed1c gia thu\u1ed9c Kh\u1ed1i th\u1ecbnh v\u01b0\u1ee3ng chung, b\u1ea1n c\u00f3 th\u1ec3 b\u1eaft g\u1eb7p Ti\u00eau chu\u1ea9n Anh (B&S)<\/strong> h\u1ec7 th\u1ed1ng\u2014c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Standard Wire Gauge (SWG)<\/strong>. V\u1ec1 m\u1eb7t l\u1ecbch s\u1eed, kh\u00e1c bi\u1ec7t v\u1edbi AWG, th\u1ef1c ti\u1ec5n \u0111i\u1ec7n hi\u1ec7n \u0111\u1ea1i ph\u1ea7n l\u1edbn \u0111\u00e3 h\u1ed9i t\u1ee5, l\u00e0m cho B&S v\u00e0 AWG v\u1ec1 m\u1eb7t ch\u1ee9c n\u0103ng gi\u1ed1ng h\u1ec7t nhau \u0111\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c k\u00edch c\u1ee1 c\u00e1p. Tuy nhi\u00ean, vi\u1ec7c hi\u1ec3u h\u1ec7 th\u1ed1ng n\u00e0y v\u1eabn quan tr\u1ecdng \u0111\u1ec3 l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c c\u00e0i \u0111\u1eb7t c\u0169 h\u01a1n, h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n \u00f4 t\u00f4 v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p c\u1ee5 th\u1ec3.<\/p>\n

      B&S so v\u1edbi AWG: C\u00f9ng thang \u0111o, T\u00ean kh\u00e1c<\/h3>\n

      Th\u01b0\u1edbc \u0111o Brown & Sharpe (B&S) \u0111\u01b0\u1ee3c th\u00e0nh l\u1eadp v\u00e0o n\u0103m 1857 \u0111\u1ec3 \u0111o kim lo\u1ea1i t\u1ea5m v\u00e0 d\u00e2y kh\u00f4ng ch\u1ee9a s\u1eaft. Theo th\u1eddi gian, n\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh ti\u00eau chu\u1ea9n cho d\u00e2y \u0111i\u1ec7n \u1edf nhi\u1ec1u qu\u1ed1c gia n\u00f3i ti\u1ebfng Anh v\u00e0 cu\u1ed1i c\u00f9ng \u0111\u00e3 ph\u00e1t tri\u1ec3n th\u00e0nh th\u1ee9 m\u00e0 B\u1eafc M\u1ef9 g\u1ecdi l\u00e0 AWG. Ng\u00e0y nay, 6 B&S t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 6 AWG<\/strong> v\u1ec1 di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang v\u00e0 \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n.<\/p>\n

      N\u01a1i \u0111\u00f4i khi x\u1ea3y ra nh\u1ea7m l\u1eabn:<\/p>\n

        \n
      • T\u00e0i li\u1ec7u k\u1ebf th\u1eeba<\/strong>: C\u00e1c b\u1ea3n v\u1ebd \u0111i\u1ec7n c\u0169 c\u1ee7a Anh c\u00f3 th\u1ec3 ch\u1ec9 \u0111\u1ecbnh \u201cB&S\u201d thay v\u00ec \u201cAWG\u201d.\u201d<\/li>\n
      • C\u00e1p \u00f4 t\u00f4\/h\u00e0ng h\u1ea3i<\/strong>: \u1ede \u00dac v\u00e0 New Zealand, c\u00e1p \u1eafc quy v\u00e0 kh\u1edfi \u0111\u1ed9ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n theo k\u00edch th\u01b0\u1edbc B&S.<\/li>\n
      • \u01afu ti\u00ean khu v\u1ef1c<\/strong>: M\u1ed9t s\u1ed1 nh\u00e0 cung c\u1ea5p s\u1eed d\u1ee5ng \u201cB&S\u201d \u0111\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1c s\u1ea3n ph\u1ea9m d\u00e0nh cho th\u1ecb tr\u01b0\u1eddng quen thu\u1ed9c v\u1edbi thu\u1eadt ng\u1eef \u0111\u00f3.<\/li>\n<\/ul>\n

        Standard Wire Gauge (SWG) so v\u1edbi B&S<\/h3>\n

        V\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, SWG l\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n ri\u00eang c\u1ee7a Anh cho \u0111\u01b0\u1eddng k\u00ednh d\u00e2y, nh\u01b0ng trong b\u1ed1i c\u1ea3nh \u0111i\u1ec7n, \u201cB&S\u201d v\u00e0 \u201cSWG\u201d th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau. \u0110i\u1ec3m m\u1ea5u ch\u1ed1t: c\u1ea3 hai \u0111\u1ec1u tu\u00e2n theo c\u00f9ng m\u1ed9t nguy\u00ean t\u1eafc ngh\u1ecbch \u0111\u1ea3o, trong \u0111\u00f3 s\u1ed1 th\u01b0\u1edbc \u0111o t\u0103ng l\u00ean khi \u0111\u1ed9 d\u00e0y c\u1ee7a d\u00e2y gi\u1ea3m.<\/p>\n

        C\u00e1c gi\u00e1 tr\u1ecb t\u01b0\u01a1ng \u0111\u01b0\u01a1ng B&S\/AWG ph\u1ed5 bi\u1ebfn<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n
        K\u00edch th\u01b0\u1edbc B&S<\/th>\nT\u01b0\u01a1ng \u0111\u01b0\u01a1ng AWG<\/th>\nDi\u1ec7n t\u00edch x\u1ea5p x\u1ec9 (mm\u00b2)<\/th>\n\u0110i\u1ec3n H\u00ecnh S\u1eed D\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n
        000 B&S (3\/0)<\/td>\n000 AWG (3\/0)<\/td>\n85.0 mm\u00b2<\/td>\nPh\u00e2n ph\u1ed1i \u0111i\u1ec7n n\u1eb7ng<\/td>\n<\/tr>\n
        0 B&S (1\/0)<\/td>\n0 AWG (1\/0)<\/td>\n53.5 mm\u00b2<\/td>\nL\u1ed1i v\u00e0o d\u1ecbch v\u1ee5, \u0111\u1ed9ng c\u01a1 l\u1edbn<\/td>\n<\/tr>\n
        2 B&S<\/td>\n2 AWG<\/td>\n33.6 mm\u00b2<\/td>\nB\u1ed9 c\u1ea5p li\u1ec7u c\u00f4ng nghi\u1ec7p<\/td>\n<\/tr>\n
        6 B&S<\/td>\n6 AWG<\/td>\n13.3 mm\u00b2<\/td>\nM\u1ea1ch nh\u00e1nh, m\u00e1y m\u00f3c<\/td>\n<\/tr>\n
        10 B&S<\/td>\n10 AWG<\/td>\n5,3 mm\u00b2<\/td>\nM\u1ea1ch \u0111i\u1ec7n thi\u1ebft b\u1ecb, chi\u1ebfu s\u00e1ng<\/td>\n<\/tr>\n
        12 B&S<\/td>\n12 AWG<\/td>\n3,3 mm\u00b2<\/td>\n\u1ed4 c\u1eafm \u0111i\u1ec7n th\u00f4ng th\u01b0\u1eddng<\/td>\n<\/tr>\n
        14 B&S<\/td>\n14 AWG<\/td>\n2,1 mm\u00b2<\/td>\nM\u1ea1ch chi\u1ebfu s\u00e1ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        Khi N\u00e0o B&S Quan Tr\u1ecdng Nh\u1ea5t<\/h3>\n
          \n
        1. H\u1ec7 Th\u1ed1ng DC<\/strong>: H\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n DC \u00f4 t\u00f4, n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi v\u00e0 h\u00e0ng h\u1ea3i th\u01b0\u1eddng s\u1eed d\u1ee5ng k\u00edch th\u01b0\u1edbc B&S, \u0111\u1eb7c bi\u1ec7t \u1edf c\u00e1c n\u01b0\u1edbc thu\u1ed9c Kh\u1ed1i Th\u1ecbnh v\u01b0\u1ee3ng chung.<\/li>\n
        2. T\u00ednh To\u00e1n S\u1ee5t \u00c1p<\/strong>: V\u00ec h\u1ec7 th\u1ed1ng DC nh\u1ea1y c\u1ea3m v\u1edbi s\u1ee5t \u00e1p, vi\u1ec7c ch\u1ecdn k\u00edch th\u01b0\u1edbc B&S ch\u00ednh x\u00e1c l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t.<\/li>\n
        3. C\u00f4ng Vi\u1ec7c Thay Th\u1ebf<\/strong>: Khi b\u1ea3o tr\u00ec c\u00e1c thi\u1ebft b\u1ecb c\u0169 do Anh thi\u1ebft k\u1ebf, b\u1ea1n c\u1ea7n ph\u1ea3i kh\u1edbp v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt B&S ban \u0111\u1ea7u.<\/li>\n<\/ol>\n

          B\u1ee9c Tranh To\u00e0n C\u1ea3nh: M\u1ed9t Ng\u00f4n Ng\u1eef To\u00e0n C\u1ea7u<\/h3>\n

          M\u1eb7c d\u00f9 t\u00ean g\u1ecdi kh\u00e1c nhau, nh\u01b0ng c\u00e1c ph\u00e9p \u0111o c\u01a1 b\u1ea3n l\u00e0 gi\u1ed1ng nhau. Cho d\u00f9 b\u1ea1n th\u1ea5y \u201c6 AWG\u201d, \u201c6 B&S\u201d hay \u201c13,3 mm\u00b2\u201d, b\u1ea1n \u0111ang xem x\u00e9t c\u00f9ng m\u1ed9t kh\u1ea3 n\u0103ng d\u1eabn \u0111i\u1ec7n. Th\u00e1ch th\u1ee9c n\u1eb1m \u1edf vi\u1ec7c nh\u1eadn ra c\u00e1c gi\u00e1 tr\u1ecb t\u01b0\u01a1ng \u0111\u01b0\u01a1ng n\u00e0y v\u00e0 \u00e1p d\u1ee5ng c\u00e1c ti\u00eau chu\u1ea9n \u0111\u1ecba ph\u01b0\u01a1ng ph\u00f9 h\u1ee3p.<\/p>\n

          B\u1ea3ng So S\u00e1nh: mm\u00b2 so v\u1edbi AWG so v\u1edbi B&S<\/h2>\n

          Chuy\u1ec3n \u0111\u1ed5i nhanh gi\u1eefa ba h\u1ec7 th\u1ed1ng k\u00edch th\u01b0\u1edbc c\u00e1p ch\u00ednh d\u1ef1a tr\u00ean c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf (IEC 60228, ASTM B258, BS 7211). \u0110\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n d\u00e0nh cho d\u00e2y d\u1eabn \u0111\u1ed3ng trong kh\u00f4ng kh\u00ed t\u1ef1 do \u1edf nhi\u1ec7t \u0111\u1ed9 c\u00e1ch \u0111i\u1ec7n 90\u00b0C.<\/p>\n

          \"Comparison
          H\u00ecnh 2: Bi\u1ec3u \u0110\u1ed3 Chuy\u1ec3n \u0110\u1ed5i K\u00edch Th\u01b0\u1edbc C\u00e1p To\u00e0n Di\u1ec7n so s\u00e1nh c\u00e1c ti\u00eau chu\u1ea9n Metric (mm\u00b2), AWG v\u00e0 B&S v\u1edbi kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i d\u00f2ng \u0111i\u1ec7n.<\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
          Metric (mm\u00b2)<\/th>\nC\u1ee1 AWG<\/th>\nK\u00edch th\u01b0\u1edbc B&S<\/th>\n\u0110\u01b0\u1eddng k\u00ednh (mm)<\/th>\nD\u00f2ng \u0110i\u1ec7n G\u1ea7n \u0110\u00fang (Cu 90\u00b0C)<\/th>\n\u1ee8ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/th>\n<\/tr>\n<\/thead>\n
          0,5 mm\u00b2<\/td>\n20 AWG<\/td>\n20 B&S<\/td>\n0,81 mm<\/td>\n11 A<\/td>\n\u0110i\u1ec7n t\u1eed, d\u00e2y t\u00edn hi\u1ec7u<\/td>\n<\/tr>\n
          0,75 mm\u00b2<\/td>\n18 AWG<\/td>\n18 B&S<\/td>\n1,02 mm<\/td>\n16 gi\u1edd s\u00e1ng<\/td>\nM\u1ea1ch \u0111i\u1ec7n c\u00f4ng su\u1ea5t th\u1ea5p, chi\u1ebfu s\u00e1ng<\/td>\n<\/tr>\n
          1,0 mm\u00b2<\/td>\n17 AWG<\/td>\n17 B&S<\/td>\n1,15 mm<\/td>\n19 A<\/td>\nM\u1ea1ch \u0111i\u1ec1u khi\u1ec3n, thi\u1ebft b\u1ecb nh\u1ecf<\/td>\n<\/tr>\n
          1,5 mm\u00b2<\/td>\n16 AWG<\/td>\n16 B&S<\/td>\n1,29 mm<\/td>\n22 A<\/td>\nM\u1ea1ch chi\u1ebfu s\u00e1ng, s\u1eed d\u1ee5ng chung<\/td>\n<\/tr>\n
          2,5 mm\u00b2<\/td>\n14 AWG<\/td>\n14 B&S<\/td>\n1,63 mm<\/td>\n32 A<\/td>\n\u1ed4 c\u1eafm, m\u1ea1ch \u0111i\u1ec7n<\/td>\n<\/tr>\n
          4,0 mm\u00b2<\/td>\n12 AWG<\/td>\n12 B&S<\/td>\n2,05 mm<\/td>\n41 A<\/td>\nM\u1ea1ch nh\u00e0 b\u1ebfp, thi\u1ebft b\u1ecb l\u1edbn h\u01a1n<\/td>\n<\/tr>\n
          6,0 mm\u00b2<\/td>\n10 AWG<\/td>\n10 B&S<\/td>\n2,59 mm<\/td>\n55 A<\/td>\n\u0110i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed, m\u1ea1ch \u0111i\u1ec7n b\u1ebfp<\/td>\n<\/tr>\n
          10 mm\u00b2<\/td>\n8 AWG<\/td>\n8 B&S<\/td>\n3,26 mm<\/td>\n73 A<\/td>\nPh\u00e2n ph\u1ed1i th\u1ee9 c\u1ea5p, m\u00e1y m\u00f3c<\/td>\n<\/tr>\n
          16 mm\u00b2<\/td>\n6 AWG<\/td>\n6 B&S<\/td>\n4,12 mm<\/td>\n101 A<\/td>\nThi\u1ebft b\u1ecb ba pha, th\u01b0\u01a1ng m\u1ea1i<\/td>\n<\/tr>\n
          25 mm\u00b2<\/td>\n4 AWG<\/td>\n4 B&S<\/td>\n5,19 mm<\/td>\n135 A<\/td>\n\u0110\u1ed9ng c\u01a1 c\u00f4ng nghi\u1ec7p, \u1ed1ng g\u00f3p ch\u00ednh<\/td>\n<\/tr>\n
          35 mm\u00b2<\/td>\n2 AWG<\/td>\n2 B&S<\/td>\n6,54 mm<\/td>\n181 A<\/td>\nM\u00e1y m\u00f3c h\u1ea1ng n\u1eb7ng, b\u1ea3ng ph\u00e2n ph\u1ed1i<\/td>\n<\/tr>\n
          50 mm\u00b2<\/td>\n1\/0AWG<\/td>\n0 B&S<\/td>\n8,25 mm<\/td>\n245 A<\/td>\n\u0110\u1ea7u v\u00e0o d\u1ecbch v\u1ee5, \u0111\u01b0\u1eddng d\u00e2y l\u1edbn<\/td>\n<\/tr>\n
          70 mm\u00b2<\/td>\n2\/0 AWG<\/td>\n00 B&S<\/td>\n9,27 mm<\/td>\n283 A<\/td>\nC\u00f4ng nghi\u1ec7p d\u00f2ng \u0111i\u1ec7n cao<\/td>\n<\/tr>\n
          95 mm\u00b2<\/td>\n3\/0 AWG<\/td>\n000 B&S<\/td>\n10.40 mm<\/td>\n328 A<\/td>\nPh\u00e2n ph\u1ed1i \u0111i\u1ec7n, tr\u1ea1m bi\u1ebfn \u00e1p<\/td>\n<\/tr>\n
          120 mm\u00b2<\/td>\n4\/0 AWG<\/td>\n0000 B&S<\/td>\n11.68 mm<\/td>\n380 A<\/td>\n\u1ee8ng d\u1ee5ng d\u00f2ng \u0111i\u1ec7n r\u1ea5t cao<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Nh\u1eefng \u0111i\u1ec3m ch\u00ednh<\/h3>\n
            \n
          • Metric (mm\u00b2)<\/strong>: Di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang, ch\u1ee7 y\u1ebfu \u1edf c\u00e1c n\u01b0\u1edbc IEC<\/li>\n
          • AWG\/B&S<\/strong>: Thang \u0111o ngh\u1ecbch \u0111\u1ea3o (s\u1ed1 c\u00e0ng nh\u1ecf = d\u00e2y c\u00e0ng d\u00e0y)<\/li>\n
          • Chuy\u1ec3n \u0111\u1ed5i<\/strong>: Lu\u00f4n ch\u1ecdn k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n ti\u1ebfp theo \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n<\/li>\n
          • \u1ee8ng d\u1ee5ng<\/strong>: C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh cho t\u1eebng ph\u1ea1m vi k\u00edch th\u01b0\u1edbc<\/li>\n<\/ul>\n

            Gi\u1eef b\u1ea3ng n\u00e0y ti\u1ec7n d\u1ee5ng cho thi\u1ebft b\u1ecb qu\u1ed1c t\u1ebf ho\u1eb7c t\u00ecm ngu\u1ed3n cung c\u1ea5p c\u00e1p.<\/p>\n

            C\u00e1ch Chuy\u1ec3n \u0110\u1ed5i Gi\u1eefa C\u00e1c H\u1ec7 Th\u1ed1ng K\u00edch Th\u01b0\u1edbc C\u00e1p<\/h2>\n

            Chuy\u1ec3n \u0111\u1ed5i ch\u00ednh x\u00e1c gi\u1eefa mm\u00b2, AWG v\u00e0 B&S \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 tu\u00e2n th\u1ee7. B\u1ea3ng so s\u00e1nh c\u1ee7a ch\u00fang t\u00f4i cung c\u1ea5p tra c\u1ee9u nhanh, nh\u01b0ng hi\u1ec3u c\u00e1c nguy\u00ean t\u1eafc s\u1ebd gi\u00fap \u00edch cho c\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t.<\/p>\n

            Ph\u01b0\u01a1ng Ph\u00e1p Chuy\u1ec3n \u0110\u1ed5i Th\u1ef1c T\u1ebf<\/h3>\n
              \n
            1. S\u1eed D\u1ee5ng B\u1ea3ng<\/strong>: \u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00f4ng vi\u1ec7c th\u1ef1c \u0111\u1ecba, b\u1ea3ng so s\u00e1nh c\u1ee7a ch\u00fang t\u00f4i cung c\u1ea5p \u0111\u1ee7 \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/li>\n
            2. M\u00e1y T\u00ednh Tr\u1ef1c Tuy\u1ebfn<\/strong>: C\u00e1c trang web nh\u01b0 RapidTables ho\u1eb7c Engineering ToolBox cung c\u1ea5p chuy\u1ec3n \u0111\u1ed5i t\u1ee9c th\u00ec.<\/li>\n
            3. \u1ee8ng D\u1ee5ng Di \u0110\u1ed9ng<\/strong>: C\u00e1c \u1ee9ng d\u1ee5ng d\u00e0nh cho th\u1ee3 \u0111i\u1ec7n th\u01b0\u1eddng bao g\u1ed3m b\u1ed9 chuy\u1ec3n \u0111\u1ed5i c\u1ee1 d\u00e2y c\u00f3 h\u1ec7 s\u1ed1 gi\u1ea3m t\u1ea3i.<\/li>\n
            4. NEC Ch\u01b0\u01a1ng 9, B\u1ea3ng 8<\/strong>: Ch\u1ee9a k\u00edch th\u01b0\u1edbc v\u00e0 di\u1ec7n t\u00edch ch\u00ednh x\u00e1c cho c\u00e1c k\u00edch th\u01b0\u1edbc AWG v\u00e0 h\u1ec7 m\u00e9t.<\/li>\n<\/ol>\n

              Nguy\u00ean T\u1eafc V\u00e0ng: L\u00e0m Tr\u00f2n L\u00ean, Kh\u00f4ng Bao Gi\u1edd Xu\u1ed1ng<\/h3>\n

              N\u1ebfu chuy\u1ec3n \u0111\u1ed5i cho 3.8 mm\u00b2 cho 12 AWG, kh\u00f4ng s\u1eed d\u1ee5ng 4.0 mm\u00b2\u2014h\u00e3y s\u1eed d\u1ee5ng 6,0 mm\u00b2<\/strong> (k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n ti\u1ebfp theo l\u1edbn h\u01a1n). \u0110i\u1ec1u n\u00e0y b\u00f9 \u0111\u1eafp cho dung sai s\u1ea3n xu\u1ea5t, v\u1eadt li\u1ec7u kh\u00e1c nhau, \u0111i\u1ec1u ki\u1ec7n l\u1eafp \u0111\u1eb7t v\u00e0 s\u1ee5t \u00e1p.<\/p>\n

              C\u00e1c T\u00ecnh Hu\u1ed1ng Chuy\u1ec3n \u0110\u1ed5i Ph\u1ed5 Bi\u1ebfn<\/h3>\n
                \n
              • B\u1eafc M\u1ef9 sang Ch\u00e2u \u00c2u<\/strong>: 10 AWG \u2248 5.26 mm\u00b2 \u2192 s\u1eed d\u1ee5ng 6,0 mm\u00b2<\/strong><\/li>\n
              • C\u00e1p DC n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi<\/strong>: C\u00e1p \u1eafc quy 6 AWG (13.3 mm\u00b2) \u2192 h\u1ec7 m\u00e9t g\u1ea7n nh\u1ea5t l\u00e0 16 mm\u00b2<\/strong> (ki\u1ec3m tra s\u1ee5t \u00e1p)<\/li>\n
              • B\u1ea3n v\u1ebd c\u0169 c\u1ee7a Anh<\/strong>: 4\/0 B&S = 4\/0 AWG (107.22 mm\u00b2) \u2192 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng hi\u1ec7n \u0111\u1ea1i 120 mm\u00b2<\/strong><\/li>\n<\/ul>\n

                Khi Chuy\u1ec3n \u0110\u1ed5i Ch\u00ednh X\u00e1c Quan Tr\u1ecdng<\/h3>\n
                  \n
                • Kh\u1ed1i \u0111\u1ea7u cu\u1ed1i<\/strong>: \u0110\u01b0\u1eddng k\u00ednh v\u1eadt l\u00fd ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1ea7u n\u1ed1i<\/li>\n
                • T\u00ednh To\u00e1n \u0110i\u1ec1n \u0110\u1ea7y \u1ed0ng Lu\u1ed3n D\u00e2y<\/strong>: Di\u1ec7n t\u00edch ch\u00ednh x\u00e1c x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u00e1p<\/li>\n
                • Kh\u1edbp \u0110i\u1ec7n Tr\u1edf<\/strong>: C\u00e1c d\u00e2y d\u1eabn song song c\u1ea7n \u0111i\u1ec7n tr\u1edf gi\u1ed1ng h\u1ec7t nhau<\/li>\n<\/ul>\n

                  Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0y, h\u00e3y tham kh\u1ea3o b\u1ea3ng d\u1eef li\u1ec7u c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t thay v\u00ec c\u00e1c b\u1ea3ng chung.<\/p>\n

                  Ch\u1ecdn K\u00edch Th\u01b0\u1edbc C\u00e1p Ph\u00f9 H\u1ee3p: C\u00e1c Y\u1ebfu T\u1ed1 Ch\u00ednh<\/h2>\n

                  \u0110\u1ecbnh c\u1ee1 c\u00e1p \u0111\u00f2i h\u1ecfi s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa c\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111i\u1ec7n, \u0111i\u1ec1u ki\u1ec7n l\u1eafp \u0111\u1eb7t v\u00e0 c\u00e1c m\u1ee9c an to\u00e0n. H\u00e3y xem x\u00e9t c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh sau:<\/p>\n

                  \"Schematic
                  H\u00ecnh 3: S\u01a1 \u0111\u1ed3 \u1ee9ng d\u1ee5ng minh h\u1ecda vi\u1ec7c \u0111\u1ecbnh c\u1ee1 c\u00e1p ph\u00f9 h\u1ee3p cho c\u00e1c t\u00ecnh hu\u1ed1ng D\u00e2n d\u1ee5ng, Th\u01b0\u01a1ng m\u1ea1i v\u00e0 C\u00f4ng nghi\u1ec7p.<\/figcaption><\/figure>\n

                  1. Kh\u1ea3 N\u0103ng D\u1eabn D\u00f2ng (Ampacity)<\/h3>\n

                  T\u00ednh to\u00e1n d\u00f2ng \u0111i\u1ec7n thi\u1ebft k\u1ebf (I_b) t\u1eeb c\u00f4ng su\u1ea5t t\u1ea3i, \u0111i\u1ec7n \u00e1p v\u00e0 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t. \u00c1p d\u1ee5ng c\u00e1c h\u1ec7 s\u1ed1 \u0111i\u1ec1u ch\u1ec9nh cho nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng, nh\u00f3m c\u00e1p, c\u00e1ch nhi\u1ec7t v\u00e0 lo\u1ea1i thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc c\u00e1p t\u1ed1i thi\u1ec3u.<\/p>\n

                  2. S\u1ee5t \u00c1p<\/h3>\n

                  Gi\u1edbi h\u1ea1n s\u1ee5t \u00e1p \u0111\u1ebfn 3% cho chi\u1ebfu s\u00e1ng, 5% cho m\u1ea1ch \u0111i\u1ec7n (khuy\u1ebfn ngh\u1ecb c\u1ee7a NEC). T\u00ednh to\u00e1n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng chi\u1ec1u d\u00e0i c\u00e1p, \u0111i\u1ec7n tr\u1edf d\u00e2y d\u1eabn v\u00e0 d\u00f2ng \u0111i\u1ec7n t\u1ea3i. \u0110\u1ed1i v\u1edbi c\u00e1c \u0111\u01b0\u1eddng d\u00e2y d\u00e0i, s\u1ee5t \u00e1p th\u01b0\u1eddng quy\u1ebft \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc h\u01a1n l\u00e0 ampacity.<\/p>\n

                  3. Ph\u01b0\u01a1ng Ph\u00e1p L\u1eafp \u0110\u1eb7t<\/h3>\n
                    \n
                  • Kh\u00f4ng kh\u00ed t\u1ef1 do<\/strong>: L\u00e0m m\u00e1t t\u1ed1t nh\u1ea5t, ampacity cao nh\u1ea5t<\/li>\n
                  • \u1ed0ng lu\u1ed3n\/m\u00e1ng c\u00e1p<\/strong>: Gi\u1ea3m lu\u1ed3ng kh\u00f4ng kh\u00ed, y\u00eau c\u1ea7u gi\u1ea3m t\u1ea3i<\/li>\n
                  • Ch\u00f4n tr\u1ef1c ti\u1ebfp<\/strong>: \u0110i\u1ec7n tr\u1edf su\u1ea5t nhi\u1ec7t c\u1ee7a \u0111\u1ea5t quan tr\u1ecdng<\/li>\n
                  • Trong l\u1edbp c\u00e1ch nhi\u1ec7t<\/strong>: C\u1ea7n gi\u1ea3m t\u1ea3i \u0111\u00e1ng k\u1ec3<\/li>\n<\/ul>\n

                    4. \u0110i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng<\/h3>\n

                    Xem x\u00e9t nhi\u1ec7t \u0111\u1ed9, \u0111\u1ed9 \u1ea9m, ti\u1ebfp x\u00fac h\u00f3a ch\u1ea5t v\u00e0 c\u00e1c y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 c\u01a1 h\u1ecdc. Ch\u1ecdn v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t ph\u00f9 h\u1ee3p (THWN, XLPE, v.v.) cho m\u00f4i tr\u01b0\u1eddng.<\/p>\n

                    5. Ti\u00eau chu\u1ea9n v\u00e0 Quy t\u1eafc<\/h3>\n

                    Tu\u00e2n th\u1ee7 NEC (B\u1eafc M\u1ef9), IEC\/BS (qu\u1ed1c t\u1ebf) ho\u1eb7c c\u00e1c quy \u0111\u1ecbnh \u0111\u1ecba ph\u01b0\u01a1ng. S\u1eed d\u1ee5ng c\u00e1c b\u1ea3ng ti\u00eau chu\u1ea9n \u0111\u1ec3 t\u00ednh to\u00e1n d\u00f2ng \u0111i\u1ec7n cho ph\u00e9p v\u00e0 s\u1ee5t \u00e1p.<\/p>\n

                    6. M\u1edf r\u1ed9ng trong t\u01b0\u01a1ng lai<\/h3>\n

                    Vi\u1ec7c ch\u1ecdn k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n m\u1ed9t ch\u00fat c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n ti\u1ebft ki\u1ec7m chi ph\u00ed thay th\u1ebf t\u1ed1n k\u00e9m n\u1ebfu t\u1ea3i t\u0103ng l\u00ean sau n\u00e0y.<\/p>\n

                    7. Chi ph\u00ed so v\u1edbi Hi\u1ec7u su\u1ea5t<\/h3>\n

                    C\u00e2n b\u1eb1ng chi ph\u00ed v\u1eadt li\u1ec7u v\u1edbi t\u1ed5n th\u1ea5t n\u0103ng l\u01b0\u1ee3ng (gia nhi\u1ec7t I\u00b2R). C\u00e1p d\u00e0y h\u01a1n c\u00f3 chi ph\u00ed ban \u0111\u1ea7u cao h\u01a1n nh\u01b0ng ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng theo th\u1eddi gian.<\/p>\n

                    B\u1eb1ng c\u00e1ch c\u00e2n nh\u1eafc c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y, b\u1ea1n s\u1ebd ch\u1ecdn \u0111\u01b0\u1ee3c lo\u1ea1i c\u00e1p an to\u00e0n, hi\u1ec7u qu\u1ea3 v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh.<\/p>\n

                    H\u00e3y ghi nh\u1edb nh\u1eefng \u0111i\u1ec1u quan tr\u1ecdng sau:<\/p>\n

                      \n
                    • An to\u00e0n l\u00e0 tr\u00ean h\u1ebft<\/strong>: Lu\u00f4n l\u00e0m tr\u00f2n l\u00ean khi chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng<\/li>\n
                    • Ti\u00eau chu\u1ea9n quan tr\u1ecdng<\/strong>: Tu\u00e2n theo NEC, IEC ho\u1eb7c c\u00e1c quy t\u1eafc \u0111\u1ecba ph\u01b0\u01a1ng theo y\u00eau c\u1ea7u<\/li>\n
                    • Xem x\u00e9t t\u1ea5t c\u1ea3 c\u00e1c y\u1ebfu t\u1ed1<\/strong>: D\u00f2ng \u0111i\u1ec7n, s\u1ee5t \u00e1p, m\u00f4i tr\u01b0\u1eddng v\u00e0 nhu c\u1ea7u trong t\u01b0\u01a1ng lai<\/li>\n
                    • X\u00e1c minh b\u1eb1ng d\u1eef li\u1ec7u<\/strong>: S\u1eed d\u1ee5ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t cho c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng<\/li>\n<\/ul>\n

                      Cho d\u00f9 b\u1ea1n \u0111ang l\u00e0m vi\u1ec7c tr\u00ean h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n d\u00e2n d\u1ee5ng, m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p hay h\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng t\u00e1i t\u1ea1o, vi\u1ec7c ch\u1ecdn k\u00edch th\u01b0\u1edbc c\u00e1p ph\u00f9 h\u1ee3p s\u1ebd ng\u0103n ng\u1eeba s\u1ef1 c\u1ed1, ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng v\u00e0 b\u1ea3o v\u1ec7 t\u00ednh m\u1ea1ng. V\u1edbi c\u00e1c b\u1ea3ng so s\u00e1nh v\u00e0 khu\u00f4n kh\u1ed5 quy\u1ebft \u0111\u1ecbnh \u0111\u01b0\u1ee3c cung c\u1ea5p \u1edf \u0111\u00e2y, b\u1ea1n \u0111\u01b0\u1ee3c trang b\u1ecb \u0111\u1ec3 \u0111\u01b0a ra c\u00e1c l\u1ef1a ch\u1ecdn s\u00e1ng su\u1ed1t \u0111\u00e1p \u1ee9ng c\u1ea3 y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt v\u00e0 tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh.<\/p>\n

                      \u0110\u1ec3 c\u00f3 c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec7n c\u1ea5p chuy\u00ean nghi\u1ec7p \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng li\u1ec1n m\u1ea1ch v\u1edbi c\u00e1p c\u00f3 k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c, h\u00e3y kh\u00e1m ph\u00e1 d\u00f2ng s\u1ea3n ph\u1ea9m c\u1ee7a VIOX Electric\u2014n\u01a1i \u0111\u1ed9 ch\u00ednh x\u00e1c k\u1ef9 thu\u1eadt \u0111\u00e1p \u1ee9ng \u0111\u1ed9 tin c\u1eady th\u1ef1c t\u1ebf.<\/em><\/p>\n

                      \"Industrial
                      H\u00ecnh 4: B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n c\u00f4ng nghi\u1ec7p ti\u00eau chu\u1ea9n cao c\u00f3 c\u00e1c th\u00e0nh ph\u1ea7n VIOX, th\u1ec3 hi\u1ec7n kh\u1ea3 n\u0103ng qu\u1ea3n l\u00fd c\u00e1p chuy\u00ean nghi\u1ec7p.<\/figcaption><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"

                      Introduction: Why Cable Size Matters Selecting the correct cable size isn’t just an engineering formality\u2014it’s a critical safety decision that affects every electrical installation. Whether you’re wiring a residential building, designing industrial machinery, or planning a solar power system, the cross-sectional area of your conductors determines how much current can flow safely, how much voltage […]<\/p>\n","protected":false},"author":1,"featured_media":20963,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-20962","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/20962","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/comments?post=20962"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/20962\/revisions"}],"predecessor-version":[{"id":20964,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/20962\/revisions\/20964"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/20963"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=20962"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=20962"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=20962"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}