{"id":1064,"date":"2015-07-10T00:00:00","date_gmt":"2015-07-10T00:00:00","guid":{"rendered":"https:\/\/www.dgcrane.com\/posts\/what-nema-means-and-the-difference-between-each-rating\/"},"modified":"2024-09-09T06:55:54","modified_gmt":"2024-09-09T06:55:54","slug":"what-nema-means-and-the-difference-between-each-rating","status":"publish","type":"posts","link":"https:\/\/www.dgcrane.com\/vi\/nema-means-difference-rating\/","title":{"rendered":"NEMA c\u00f3 ngh\u0129a l\u00e0 g\u00ec v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ed7i x\u1ebfp h\u1ea1ng"},"content":{"rendered":"

C\u00c2U H\u1eceI:<\/p>\r\n

T\u00f4i ph\u1ea3i l\u1eafp \u0111\u1eb7t hai thi\u1ebft b\u1ecb m\u1edbi trong c\u01a1 s\u1edf c\u00f4ng nghi\u1ec7p c\u1ee7a ch\u00fang t\u00f4i. M\u1ed9t h\u1ec7 th\u1ed1ng s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi v\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nh\u00e0. M\u1ed9t th\u1ee3 \u0111i\u1ec7n n\u00f3i v\u1edbi ch\u00fang t\u00f4i r\u1eb1ng ch\u00fang t\u00f4i ph\u1ea3i s\u1eed d\u1ee5ng m\u1ed9t v\u1ecf b\u1ecdc c\u1ee5 th\u1ec3 \u0111\u1ec3 ch\u1ee9a h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n cho c\u1ea3 hai h\u1ec7 th\u1ed1ng v\u00e0 ch\u00fang ph\u1ea3i \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng NEMA. T\u00f4i \u0111\u00e3 nghe thu\u1eadt ng\u1eef n\u00e0y nhi\u1ec1u l\u1ea7n, nh\u01b0ng t\u00f4i kh\u00f4ng ch\u1eafc ch\u00ednh x\u00e1c NEMA c\u00f3 ngh\u0129a l\u00e0 g\u00ec v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ed7i x\u1ebfp h\u1ea1ng. T\u00f4i hy v\u1ecdng b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m r\u00f5.<\/span><\/span><\/p>\r\n

\"\"\"\"<\/p>\r\n

H\u00c3Y B\u1ece L\u1ee0 N\u00d3:<\/span><\/p>\r\n

N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ki\u1ebfm tr\u00ean th\u1ecb tr\u01b0\u1eddng m\u1ed9t c\u1ea7n tr\u1ee5c c\u00f3 \u0111\u1ed9ng c\u01a1 ho\u1eb7c c\u01a1 s\u1edf c\u1ee7a b\u1ea1n \u0111\u00e3 s\u1eed d\u1ee5ng m\u1ed9t chi\u1ebfc c\u1ea7n tr\u1ee5c, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u00e3 nghe \u0111\u1ebfn thu\u1eadt ng\u1eef \u00a1\u00b0 \u0111\u00e1nh gi\u00e1 NEMA\u00a1 \u00b1. Tr\u00ean th\u1ef1c t\u1ebf, m\u1ed9t s\u1ed1 \u0111\u1ed9c gi\u1ea3 \u0111\u00e3 g\u1eedi email cho ch\u00fang t\u00f4i th\u1eafc m\u1eafc \u0111i\u1ec1u g\u00ec quy\u1ebft \u0111\u1ecbnh x\u1ebfp h\u1ea1ng NEMA v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi cho c\u00e2u h\u1ecfi \u0111\u00f3 l\u00e0: NEMA c\u00f3.
\r\nNEMA l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Hi\u1ec7p h\u1ed9i c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111i\u1ec7n qu\u1ed1c gia, \u0111\u01b0\u1ee3c th\u00e0nh l\u1eadp v\u00e0o n\u0103m 1926 nh\u1eb1m \u0111\u1eb7t ra c\u00e1c ti\u00eau chu\u1ea9n cho c\u00e1c c\u00f4ng ty s\u1ea3n xu\u1ea5t c\u00e1c s\u1ea3n ph\u1ea9m \u0111i\u1ec7n. X\u1ebfp h\u1ea1ng v\u1ecf b\u1ecdc NEMA th\u1ef1c s\u1ef1 \u00e1p d\u1ee5ng cho b\u1ea5t k\u1ef3 lo\u1ea1i thi\u1ebft b\u1ecb \u0111i\u1ec7n ho\u1eb7c h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n n\u00e0o \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t ngo\u00e0i tr\u1eddi ho\u1eb7c trong c\u01a1 s\u1edf c\u00f4ng nghi\u1ec7p.
\r\nBan \u0111\u1ea7u, NEMA \u0111\u1eb7t ra m\u1ee5c ti\u00eau \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n, linh ki\u1ec7n v\u00e0 h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n. Tuy nhi\u00ean, khi c\u00f4ng ngh\u1ec7 \u0111\u00e3 ph\u00e1t tri\u1ec3n theo th\u1eddi gian, th\u00ec c\u0169ng c\u1ea7n ph\u1ea3i b\u1ea3o v\u1ec7 n\u00f3. Gi\u1edd \u0111\u00e2y, c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec7n nh\u01b0 \u0111i\u1ec1u khi\u1ec3n, thi\u1ebft b\u1ecb d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng v\u00e0 h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 kh\u1ecfi \u1ee9ng d\u1ee5ng v\u00e0 m\u00f4i tr\u01b0\u1eddng m\u00e0 ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. C\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 cung c\u1ea5p s\u1ef1 b\u1ea3o v\u1ec7 \u0111\u00f3 l\u00e0 \u0111\u1eb7t ch\u00fang trong m\u1ed9t bao v\u00e2y ho\u1eb7c t\u1ee7.<\/p>\r\n

M\u1eb7c d\u00f9 NEMA kh\u00f4ng ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 v\u1ecf t\u1ee7 \u0111i\u1ec7n, h\u1ecd \u0111\u00e3 ph\u00e1t tri\u1ec3n m\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u00e1nh gi\u00e1 \u0111\u1ec3 ph\u00e2n lo\u1ea1i v\u00e0 \u0111i\u1ec1u ch\u1ec9nh ch\u00fang. K\u1ec3 t\u1eeb \u0111\u00f3, x\u1ebfp h\u1ea1ng NEMA \u0111\u00e3 tr\u1edf th\u00e0nh ti\u00eau chu\u1ea9n cho c\u00e1c lo\u1ea1i th\u00f9ng loa. M\u1ed7i x\u1ebfp h\u1ea1ng NEMA \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi m\u1ed9t \u1ee9ng d\u1ee5ng v\u00e0 m\u00f4i tr\u01b0\u1eddng c\u1ee5 th\u1ec3, gi\u00fap \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n \u0111ang s\u1eed d\u1ee5ng \u0111\u00fang lo\u1ea1i v\u1ecf cho ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00ecnh. V\u00e0, c\u00f3 m\u1ed9t l\u00fd do ch\u00ednh \u0111\u00e1ng cho \u0111i\u1ec1u \u0111\u00f3.<\/p>\r\n

C\u00e1c th\u00f9ng loa \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng NEMA th\u1ef1c hi\u1ec7n m\u1ed9t ch\u1ee9c n\u0103ng r\u1ea5t quan tr\u1ecdng: ki\u1ec3m so\u00e1t \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra. S\u1ef1 x\u00e2m nh\u1eadp \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 kh\u1ea3 n\u0103ng x\u00e2m nh\u1eadp v\u00e0o m\u1ed9t c\u1ea5u tr\u00fac ho\u1eb7c kh\u00f4ng gian trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, m\u1ed9t v\u1ecf b\u1ecdc \u0111i\u1ec7n. M\u1eb7t kh\u00e1c, l\u1ed1i tho\u00e1t \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 kh\u1ea3 n\u0103ng tho\u00e1t ra kh\u1ecfi m\u1ed9t c\u1ea5u tr\u00fac ho\u1eb7c kh\u00f4ng gian. M\u1eb7c d\u00f9 h\u1ea7u h\u1ebft c\u00e1c x\u1ebfp h\u1ea1ng NEMA t\u1eadp trung v\u00e0o vi\u1ec7c ng\u0103n ch\u1eb7n s\u1ef1 x\u00e2m nh\u1eadp (ng\u0103n m\u1ed9t ch\u1ea5t x\u00e2m nh\u1eadp v\u00e0o v\u1ecf b\u1ecdc \u0111i\u1ec7n c\u1ee7a b\u1ea1n), nh\u01b0ng c\u00f3 m\u1ed9t s\u1ed1 x\u1ebfp h\u1ea1ng c\u0169ng c\u00f3 t\u00e1c d\u1ee5ng ng\u0103n ch\u1eb7n s\u1ef1 x\u00e2m nh\u1eadp (ng\u0103n ch\u1eb7n m\u1ed9t ch\u1ea5t n\u00e0o \u0111\u00f3 tho\u00e1t ra kh\u1ecfi v\u1ecf b\u1ecdc \u0111i\u1ec7n c\u1ee7a b\u1ea1n). \u0110i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 ch\u1ecdn x\u1ebfp h\u1ea1ng NEMA ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec7n v\u00e0 h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n c\u1ee7a b\u1ea1n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng ph\u00e2n t\u00edch c\u00e1c x\u1ebfp h\u1ea1ng NEMA \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u00e0 ch\u00fang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u00e0m g\u00ec:<\/p>\r\n

    \r\n\t
  1. V\u1ecf NEMA 1 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn b\u00ean trong kh\u1ecfi c\u00e1c v\u1eadt th\u1ec3 v\u00e0 nh\u00e2n vi\u00ean b\u00ean ngo\u00e0i. Ch\u00fang \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n \u0111\u1ec3 s\u1eed d\u1ee5ng trong nh\u00e0 v\u00e0 b\u1ea3o v\u1ec7 ng\u01b0\u1eddi lao \u0111\u1ed9ng b\u1eb1ng c\u00e1ch h\u1ea1n ch\u1ebf ti\u1ebfp c\u1eadn c\u00e1c th\u00e0nh ph\u1ea7n nguy hi\u1ec3m ti\u1ec1m \u1ea9n. Ch\u00fang kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 lo\u1ea1i b\u1ecf c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m r\u1eafn nh\u01b0 n\u01b0\u1edbc, b\u1ee5i, d\u1ea7u v\u00e0 b\u0103ng. M\u1eb7c d\u00f9 c\u00e1c th\u00f9ng loa NEMA \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o v\u1edbi m\u1ed9t c\u1eeda c\u00f3 ch\u1ed1t, nh\u01b0ng ch\u00fang kh\u00f4ng c\u00f3 b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c b\u1ecbt k\u00edn b\u1eb1ng gio\u0103ng.<\/li>\r\n\t
  2. V\u1ecf NEMA 3R th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng ngo\u00e0i tr\u1eddi \u0111\u1ec3 n\u1ed1i d\u00e2y v\u00e0 h\u1ed9p n\u1ed1i. Ch\u00fang che ch\u1eafn c\u00f4ng nh\u00e2n kh\u1ecfi c\u00e1c b\u1ed9 ph\u1eadn nguy hi\u1ec3m v\u00e0 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m r\u1eafn nh\u01b0 m\u01b0a, m\u01b0a \u0111\u00e1, tuy\u1ebft v\u00e0 s\u1ef1 h\u00ecnh th\u00e0nh b\u0103ng b\u00ean ngo\u00e0i.<\/li>\r\n\t
  3. V\u1ecf NEMA 4 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t \u0111\u1ec3 s\u1eed d\u1ee5ng trong nh\u00e0 ho\u1eb7c ngo\u00e0i tr\u1eddi v\u00e0 c\u0169ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a m\u01b0a, m\u01b0a tuy\u1ebft v\u00e0 tuy\u1ebft. Ch\u00fang ng\u0103n ch\u1eb7n s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a c\u00e1c ch\u1ea5t b\u1ea9n r\u1eafn nh\u01b0 b\u1ee5i b\u1ea9n v\u00e0 kh\u00f4ng b\u1ecb h\u01b0 h\u1ea1i do h\u00ecnh th\u00e0nh b\u0103ng \u1edf b\u1ec1 m\u1eb7t b\u00ean ngo\u00e0i. V\u1ecf NEMA 4 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng n\u01a1i thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c phun ho\u1eb7c r\u1eeda b\u1eb1ng v\u00f2i \u0111\u1eb7c bi\u1ec7t l\u00e0 khi s\u1eed d\u1ee5ng d\u00f2ng n\u01b0\u1edbc c\u00f3 \u00e1p su\u1ea5t. Ch\u00fang c\u00f3 b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c b\u1ecbt k\u00edn b\u1eb1ng gio\u0103ng v\u00e0 m\u1ed9t c\u00e1nh c\u1eeda \u0111\u01b0\u1ee3c k\u1eb9p ch\u1eb7t \u0111\u1ec3 c\u00f3 \u0111\u1ed9 k\u00edn t\u1ed1i \u0111a.<\/li>\r\n\t
  4. Th\u00f9ng loa NEMA 4X th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 ho\u1eb7c s\u1ee3i th\u1ee7y tinh. Ch\u00fang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t h\u01a1n so v\u1edbi th\u00f9ng NEMA 4 ti\u00eau chu\u1ea9n. C\u00e1c v\u1ecf b\u1ecdc n\u00e0y cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a c\u00e1c v\u1eadt th\u1ec3 r\u1eafn b\u00ean ngo\u00e0i v\u00e0 ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m, bao g\u1ed3m b\u1ee5i, tuy\u1ebft, m\u01b0a v\u00e0 n\u01b0\u1edbc v\u00f2i c\u00f3 \u00e1p su\u1ea5t. Ch\u00fang v\u1eabn kh\u00f4ng b\u1ecb h\u01b0 h\u1ea1i b\u1edfi s\u1ef1 h\u00ecnh th\u00e0nh b\u0103ng b\u00ean ngo\u00e0i v\u00e0 cung c\u1ea5p th\u00eam m\u1ed9t m\u1ee9c b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i s\u1ef1 \u0103n m\u00f2n. V\u1ecf NEMA 4X th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c c\u01a1 s\u1edf h\u00f3a d\u1ea7u v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m \u1edf nh\u1eefng n\u01a1i thi\u1ebft b\u1ecb ph\u1ea3i \u0111\u01b0\u1ee3c r\u1eeda s\u1ea1ch b\u1eb1ng ch\u1ea5t kh\u1eed tr\u00f9ng th\u01b0\u1eddng xuy\u00ean<\/li>\r\n\t
  5. V\u1ecf NEMA 6 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c \u1ee9ng d\u1ee5ng trong nh\u00e0 ho\u1eb7c ngo\u00e0i tr\u1eddi \u0111\u1ec3 b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec7n kh\u1ecfi n\u01b0\u1edbc. V\u1ecf NEMA 6 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a n\u01b0\u1edbc trong qu\u00e1 tr\u00ecnh l\u1eb7n kh\u00f4ng th\u01b0\u1eddng xuy\u00ean \u1edf \u0111\u1ed9 s\u00e2u gi\u1edbi h\u1ea1n.<\/li>\r\n\t
  6. V\u1ecf b\u1ecdc NEMA 6P cung c\u1ea5p th\u00eam m\u1ed9t bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i s\u1ef1 \u0103n m\u00f2n v\u00e0 \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u \u0111\u1ec3 kh\u00f4ng b\u1ecb h\u01b0 h\u1ea1i trong tr\u01b0\u1eddng h\u1ee3p h\u00ecnh th\u00e0nh b\u0103ng b\u00ean ngo\u00e0i. V\u1ecf NEMA 6P \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a n\u01b0\u1edbc trong qu\u00e1 tr\u00ecnh ng\u00e2m n\u01b0\u1edbc k\u00e9o d\u00e0i \u1edf \u0111\u1ed9 s\u00e2u h\u1ea1n ch\u1ebf.<\/li>\r\n\t
  7. NEMA 12 th\u00f9ng loa \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ed1ng l\u1ea1i ti\u1ebfng \u1ed3n; ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nh\u00e0 \u0111\u1ec3 h\u1ea1n ch\u1ebf nh\u00e2n vi\u00ean ti\u1ebfp c\u1eadn v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n nguy hi\u1ec3m v\u00e0 \u0111\u1ec3 b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb k\u00e8m theo kh\u1ecfi s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a c\u00e1c ch\u1ea5t b\u1ea9n r\u1eafn b\u00ean ngo\u00e0i nh\u01b0 b\u1ee5i trong kh\u00f4ng kh\u00ed, b\u1ee5i b\u1ea9n r\u01a1i xu\u1ed1ng, \u0111\u00e1, s\u1ee3i, x\u01a1 v\u1ea3i v\u00e0 bay ra. Ch\u00fang c\u0169ng b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb k\u00e8m theo kh\u1ecfi ch\u1ea5t l\u1ecfng nh\u1ecf gi\u1ecdt (kh\u00f4ng \u0103n m\u00f2n).<\/li>\r\n\t
  8. Th\u00f9ng loa NEMA 4\/12 c\u00f3 c\u00e1c kh\u00eda c\u1ea1nh thi\u1ebft k\u1ebf t\u1eeb c\u1ea3 th\u00f9ng loa NEMA 4 v\u00e0 NEMA 12. V\u1ecf b\u1ecdc th\u01b0\u1eddng c\u00f3 c\u00e1c c\u1eeda c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c, b\u1ea3n l\u1ec1 gi\u1ea5u k\u00edn v\u00e0 c\u00e1c l\u1ed7 l\u1eafp ph\u00eda sau \u0111\u1ec3 d\u1ec5 d\u00e0ng l\u1eafp \u0111\u1eb7t v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c b\u1ed9 ph\u1eadn \u0111i\u1ec7n kh\u1ecfi c\u00e1c ch\u1ea5t b\u1ea9n r\u1eafn, n\u01b0\u1edbc v\u00e0 s\u1ef1 h\u00ecnh th\u00e0nh b\u0103ng \u1edf b\u1ec1 m\u1eb7t b\u00ean ngo\u00e0i. B\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c l\u00e0m k\u00edn b\u1eb1ng gio\u0103ng v\u00e0 c\u1eeda k\u1eb9p \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 k\u00edn t\u1ed1i \u0111a cho c\u00e1c \u1ee9ng d\u1ee5ng n\u01a1i thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c th\u00e1o ra ho\u1eb7c phun b\u1eb1ng d\u00f2ng n\u01b0\u1edbc c\u00f3 \u00e1p su\u1ea5t.<\/li>\r\n<\/ol>\r\n

    C\u00c1C KHUY\u1ebeN C\u00c1O \u0110\u01af\u1ee2C NEMA X\u1ebeP H\u1ea0NG CHO C\u00c1C V\u1eca TR\u00cd NGUY HI\u1ec2M:<\/span><\/p>\r\n

    V\u1ecf NEMA 7 v\u00e0 NEMA 10 \u0111\u1ec1u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ee9a c\u00e1c v\u1ee5 n\u1ed5 b\u00ean trong m\u00e0 kh\u00f4ng g\u00e2y ra c\u00e1c m\u1ed1i nguy hi\u1ec3m b\u00ean ngo\u00e0i. V\u1ecf NEMA 8 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ng\u0103n ch\u1eb7n s\u1ef1 ch\u00e1y trong thi\u1ebft b\u1ecb ng\u00e2m trong d\u1ea7u, trong khi v\u1ecf NEMA 9 ng\u0103n ch\u1eb7n s\u1ef1 b\u1eaft l\u1eeda c\u1ee7a b\u1ee5i d\u1ec5 ch\u00e1y. C\u00e1c v\u1ecf b\u1ecdc c\u1ee5 th\u1ec3 n\u00e0y \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi B\u1ed9 lu\u1eadt \u0111i\u1ec7n qu\u1ed1c gia? (NEC) v\u00e0 Hi\u1ec7p h\u1ed9i Ph\u00f2ng ch\u00e1y ch\u1eefa ch\u00e1y Qu\u1ed1c gia (NFPA).<\/p>\r\n

    \u0110\u00e2y l\u00e0 c\u00e1ch n\u00f3 ho\u1ea1t \u0111\u1ed9ng: B\u1ed9 lu\u1eadt \u0110i\u1ec7n Qu\u1ed1c gia (NEC) l\u00e0 ti\u00eau chu\u1ea9n cho vi\u1ec7c thi\u1ebft k\u1ebf, l\u1eafp \u0111\u1eb7t v\u00e0 ki\u1ec3m tra \u0111i\u1ec7n an to\u00e0n \u0111\u1ec3 b\u1ea3o v\u1ec7 kh\u1ecfi c\u00e1c nguy c\u01a1 v\u1ec1 \u0111i\u1ec7n. NFPA \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn nhi\u1ec1u nh\u1ea5t v\u1edbi s\u1ef1 t\u00e0i tr\u1ee3 c\u1ee7a NEC v\u00e0 ti\u00eau chu\u1ea9n c\u1ee7a h\u1ecd v\u1ec1 an to\u00e0n \u0111i\u1ec7n t\u1ea1i n\u01a1i l\u00e0m vi\u1ec7c, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 NFPA 70. Theo thu\u1eadt ng\u1eef c\u1ee7a ng\u01b0\u1eddi d\u00e2n, NFPA 70 l\u00e0 m\u1ed9t t\u1eeb vi\u1ebft t\u1eaft \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho an to\u00e0n \u0111i\u1ec7n v\u00e0 ch\u00e1y t\u1ea1i n\u01a1i l\u00e0m vi\u1ec7c, v\u00e0 n\u00f3 gi\u1ea3i quy\u1ebft vi\u1ec7c l\u1eafp \u0111\u1eb7t d\u00e2y d\u1eabn \u0111i\u1ec7n, d\u00e2y d\u1eabn t\u00edn hi\u1ec7u v\u00e0 c\u00e1p quang trong c\u00e1c khu th\u01b0\u01a1ng m\u1ea1i, khu d\u00e2n c\u01b0 v\u00e0 c\u00f4ng nghi\u1ec7p.<\/p>\r\n

    C\u1ee4 TH\u1ec2 H\u01a0N:<\/p>\r\n

      \r\n\t
    1. V\u1ecf NEMA 7 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng trong nh\u00e0 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i l\u00e0 c\u00f3 kh\u1ea3 n\u0103ng nguy hi\u1ec3m. V\u1ecf NEMA 7 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c v\u1ecb tr\u00ed \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 Lo\u1ea1i 1 (kh\u00ed ho\u1eb7c h\u01a1i c\u00f3 kh\u1ea3 n\u0103ng g\u00e2y n\u1ed5).<\/li>\r\n\t
    2. Th\u00f9ng loa NEMA 8 t\u01b0\u01a1ng t\u1ef1 nh\u01b0 th\u00f9ng loa NEMA 7. Ch\u00fang c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf c\u00e1c \u0111\u1ecba \u0111i\u1ec3m Lo\u1ea1i 1 (kh\u00ed ho\u1eb7c h\u01a1i c\u00f3 kh\u1ea3 n\u0103ng n\u1ed5). Tuy nhi\u00ean, ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nh\u00e0 ho\u1eb7c ngo\u00e0i tr\u1eddi, v\u00e0 ch\u00fang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn \u0111i\u1ec7n b\u1ecb ng\u00e2m trong d\u1ea7u.<\/li>\r\n\t
    3. V\u1ecf NEMA 9 \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o \u0111\u1ec3 s\u1eed d\u1ee5ng trong nh\u00e0 \u1edf c\u00e1c v\u1ecb tr\u00ed nguy hi\u1ec3m C\u1ea5p II, Ph\u00e2n khu 1, theo \u0111\u1ecbnh ngh\u0129a c\u1ee7a H\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i B\u1eafc M\u1ef9 v\u00e0 Hi\u1ec7p h\u1ed9i Ph\u00f2ng ch\u00e1y ch\u1eefa ch\u00e1y Qu\u1ed1c gia (NFPA). C\u00e1c v\u1ecb tr\u00ed nguy hi\u1ec3m C\u1ea5p II, Ph\u00e2n khu 1 li\u00ean quan \u0111\u1ebfn b\u1ee5i c\u00f3 kh\u1ea3 n\u0103ng n\u1ed5 trong gi\u1edd ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/li>\r\n\t
    4. V\u1ecf NEMA 10 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a C\u1ee5c Qu\u1ea3n l\u00fd S\u1ee9c kh\u1ecfe v\u00e0 An to\u00e0n Bom m\u00ecn, 30 CFR, Ph\u1ea7n 18.<\/li>\r\n<\/ol>\r\n

      Nhu c\u1ea7u v\u1ec1 c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n \u0111\u00e3 v\u01b0\u1ee3t xa c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n \u0111\u1ed9ng l\u1ef1c kh\u00e1c. Khi vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c s\u1ea3n ph\u1ea9m \u0111i\u1ec7n ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, th\u00ec nhu c\u1ea7u v\u1ec1 c\u00e1c quy \u0111\u1ecbnh s\u1ea3n xu\u1ea5t v\u1ec1 an to\u00e0n \u0111i\u1ec7n c\u0169ng v\u1eady. NEMA \u0111\u00e3 thi\u1ebft l\u1eadp m\u1ed9t quy tr\u00ecnh ph\u00e2n lo\u1ea1i \u0111\u01a1n gi\u1ea3n \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb, th\u00fac \u0111\u1ea9y s\u1ef1 an to\u00e0n c\u1ee7a ng\u01b0\u1eddi lao \u0111\u1ed9ng v\u00e0 ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n c\u00e1c ti\u00eau chu\u1ea9n m\u1edbi cho ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111i\u1ec7n kh\u00f4ng ng\u1eebng ph\u00e1t tri\u1ec3n.<\/p>","protected":false},"excerpt":{"rendered":"C\u00c2U H\u1eceI: T\u00f4i ph\u1ea3i l\u1eafp \u0111\u1eb7t hai thi\u1ebft b\u1ecb m\u1edbi trong c\u01a1 s\u1edf c\u00f4ng nghi\u1ec7p c\u1ee7a ch\u00fang t\u00f4i. M\u1ed9t h\u1ec7 th\u1ed1ng s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi v\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nh\u00e0. M\u1ed9t th\u1ee3 \u0111i\u1ec7n n\u00f3i v\u1edbi ch\u00fang t\u00f4i r\u1eb1ng ch\u00fang t\u00f4i ph\u1ea3i s\u1eed d\u1ee5ng m\u1ed9t v\u1ecf b\u1ecdc c\u1ee5 th\u1ec3 \u0111\u1ec3 ch\u1ee9a h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n cho c\u1ea3 hai h\u1ec7 th\u1ed1ng v\u00e0 ch\u00fang ph\u1ea3i \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng NEMA. T\u00f4i \u0111\u00e3 nghe thu\u1eadt ng\u1eef [\u2026]","protected":false},"featured_media":1263,"parent":0,"menu_order":0,"template":"","posts_category":[351],"posts_tag":[7,41,33],"class_list":["post-1064","posts","type-posts","status-publish","has-post-thumbnail","hentry","posts_category-blog","posts_tag-crane","posts_tag-crane-posts","posts_tag-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts\/1064"}],"collection":[{"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts"}],"about":[{"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/types\/posts"}],"version-history":[{"count":3,"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts\/1064\/revisions"}],"predecessor-version":[{"id":1136,"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/xmxposts\/1064\/revisions\/1136"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/media\/1263"}],"wp:attachment":[{"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/media?parent=1064"}],"wp:term":[{"taxonomy":"posts_category","embeddable":true,"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/posts_category?post=1064"},{"taxonomy":"posts_tag","embeddable":true,"href":"https:\/\/www.dgcrane.com\/vi\/wp-json\/wp\/v2\/posts_tag?post=1064"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}