{"id":58777,"date":"2026-03-12T03:27:29","date_gmt":"2026-03-12T07:27:29","guid":{"rendered":"https:\/\/www.kdstelectrical.com\/?p=58777"},"modified":"2026-03-12T04:16:47","modified_gmt":"2026-03-12T08:16:47","slug":"nema-danh-gia-bao-vay-nha-san-xuat","status":"publish","type":"post","link":"https:\/\/www.kdstelectrical.com\/vi\/nema-danh-gia-bao-vay-nha-san-xuat\/","title":{"rendered":"Nh\u00e0 s\u1ea3n xu\u1ea5t v\u1ecf b\u1ecdc \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng NEMA: Lo\u1ea1i, X\u1ebfp h\u1ea1ng & L\u1ef1a ch\u1ecdn"},"content":{"rendered":"
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C\u00e1ch ch\u1ecdn v\u1ecf b\u1ecdc \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng NEMA Nh\u00e0 s\u1ea3n xu\u1ea5t: H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn v\u00e0 x\u1ebfp h\u1ea1ng ho\u00e0n ch\u1ec9nh<\/p>\n

Ch\u1ecdn sai x\u1ebfp h\u1ea1ng bao v\u00e2y nema c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn l\u1ed7i thi\u1ebft b\u1ecb, vi ph\u1ea1m OSHA v\u00e0 t\u1ed5n th\u1ea5t n\u0103ng su\u1ea5t t\u1ed1n k\u00e9m. OSHA 29 CFR 1910.303<\/a> dictates r\u1eb1ng thi\u1ebft b\u1ecb \u0111i\u1ec7n \u0111\u01b0\u1ee3c bao b\u1ecdc trong v\u1ecf ng\u0103n ch\u1eb7n s\u1ef1 ti\u1ebfp x\u00fac c\u1ee7a nh\u00e2n vi\u00ean v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn n\u0103ng l\u01b0\u1ee3ng, v\u00e0 h\u1ecd b\u1ea3o v\u1ec7 c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec7n t\u1eeb \u0111\u1ed9 \u1ea9m v\u00e0 c\u00e1c y\u1ebfu t\u1ed1. h\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd x\u00e1c \u0111\u1ecbnh t\u1eebng lo\u1ea1i bao v\u00e2y nema, m\u00f4 t\u1ea3 c\u00e1ch x\u1ebfp h\u1ea1ng nema kh\u00e1c v\u1edbi IPcode, v\u00e0 h\u01b0\u1edbng d\u1eabn b\u1ea1n th\u00f4ng qua qu\u00e1 tr\u00ecnh c\u1ee9u s\u1ed1ng \u0111\u00e1nh gi\u00e1 nh\u00e0 s\u1ea3n xu\u1ea5t bao v\u00e2y nema-\u0111\u00e1nh gi\u00e1 th\u00edch h\u1ee3p.<\/p>\n

Kh\u00f4ng c\u00f3 v\u1ea5n \u0111\u1ec1 n\u1ebfu b\u1ea1n \u0111ang ch\u1ec9 \u0111\u1ecbnh bao v\u00e2y cho m\u1ed9t bao v\u00e2y vi\u1ec5n th\u00f4ng ngo\u00e0i tr\u1eddi, m\u1ed9t khu v\u1ef1c r\u1eeda ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, ho\u1eb7c m\u1ed9t t\u1ee7 t\u1ef1 \u0111\u1ed9ng h\u00f3a trong nh\u00e0-hi\u1ec3u h\u1ec7 th\u1ed1ng \u0111\u00e1nh gi\u00e1 nema l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean c\u1ee7a b\u1ea1n trong vi\u1ec7c \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh mua \u00e2m thanh.<\/p>\n

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V\u1ecf b\u1ecdc \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng NEMA l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao ch\u00fang l\u1ea1i quan tr\u1ecdng?<\/h2>\n

\"V\u1ecf<\/a><\/p>\n

V\u1ecf b\u1ecdc \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng nema l\u00e0 v\u1ecf b\u1ea3o v\u1ec7 cho c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n t\u1eed \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng \u0111\u00e3 \u0111\u1eb7t ra \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u trong Hi\u1ec7p h\u1ed9i c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111i\u1ec7n qu\u1ed1c gia (NEMA)<\/a>. m\u1ed7i v\u1ecf b\u1ecdc nema cung c\u1ea5p m\u1ed9t m\u1ee9c \u0111\u1ed9 b\u1ea3o v\u1ec7 v\u1ecf b\u1ecdc c\u1ee5 th\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c m\u1ed1i nguy hi\u1ec3m nh\u01b0 t\u00ednh th\u1ea5m b\u1ee5i, s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a n\u01b0\u1edbc, \u0103n m\u00f2n ho\u1eb7c ti\u1ebfp x\u00fac v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn \u0111i\u1ec7n mang \u0111i\u1ec7n.<\/p>\n

Ban \u0111\u1ea7u \u0111\u01b0\u1ee3c xu\u1ea5t b\u1ea3n d\u01b0\u1edbi d\u1ea1ng nema 250, m\u00e3 n\u00e0y do Hi\u1ec7p h\u1ed9i c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111i\u1ec7n qu\u1ed1c gia ph\u00e1t tri\u1ec3n \u0111\u00e3 t\u1ea1o ra m\u1ed9t h\u1ec7 th\u1ed1ng x\u1ebfp h\u1ea1ng th\u1ed1ng nh\u1ea5t \u0111\u01a1n gi\u1ea3n m\u00e0 c\u00e1c k\u1ef9 s\u01b0, nh\u00e0 th\u1ea7u v\u00e0 ng\u01b0\u1eddi v\u1eadn h\u00e0nh nh\u00e0 m\u00e1y c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng s\u1eed d\u1ee5ng khi ch\u1ec9 \u0111\u1ecbnh v\u1ecf \u0111i\u1ec7n t\u1eed cho h\u1ec7 th\u1ed1ng \u0111i\u1ec7n. N\u00f3 ch\u1ec9 \u0111\u1ecbnh h\u01a1n 13 lo\u1ea1i v\u1ecf ri\u00eang bi\u1ec7t, m\u1ed7i lo\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho m\u1ed9t m\u00f4i tr\u01b0\u1eddng trong nh\u00e0 v\u00e0 ngo\u00e0i tr\u1eddi nh\u1ea5t \u0111\u1ecbnh. Kh\u00f4ng gi\u1ed1ng nh\u01b0 v\u1ecf c\u00f3 m\u1ee5c \u0111\u00edch chung \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng cho nhi\u1ec1u t\u00ecnh hu\u1ed1ng, v\u1ecf b\u1ecdc \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng nema \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u00e0 x\u1ebfp h\u1ea1ng theo c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00e0 n\u00f3 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c - t\u1eeb b\u1ee5i nh\u00e0 m\u00e1y r\u01a1i xu\u1ed1ng n\u01b0\u1edbc h\u01b0\u1edbng \u1ed1ng trong m\u1ed9t nh\u00e0 m\u00e1y ch\u1ebf bi\u1ebfn ngo\u00e0i tr\u1eddi kh\u1eafc nghi\u1ec7t.<\/p>\n

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13+<\/div>\n
C\u00e1c lo\u1ea1i v\u1ecf b\u1ecdc NEMA<\/div>\n<\/div>\n
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NEMA 250<\/div>\n
Ti\u00eau chu\u1ea9n qu\u1ea3n l\u00fd<\/div>\n<\/div>\n
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OSHA<\/div>\n
Nhi\u1ec7m v\u1ee5 bao v\u00e2y th\u00edch h\u1ee3p<\/div>\n<\/div>\n<\/div>\n

\u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 qu\u1ea3n l\u00fd mua s\u1eafm, x\u1ebfp h\u1ea1ng nema lo\u1ea1i b\u1ecf ph\u1ecfng \u0111o\u00e1n khi mua c\u00e1c h\u1ed9p \u0111i\u1ec7n th\u00edch h\u1ee3p.Thay v\u00ec d\u1ef1a v\u00e0o c\u00e1c m\u00f4 t\u1ea3 r\u1ed9ng nh\u01b0 \u201cngo\u00e0i tr\u1eddi ch\u1ecbu \u0111\u01b0\u1ee3c th\u1eddi ti\u1ebft\u201dho\u1eb7c \u201cb\u1ee5i k\u00edn,\u201d m\u00e3 nema m\u00f4 t\u1ea3 r\u00f5 r\u00e0ng nh\u1eefng m\u1ed1i nguy hi\u1ec3m m\u00f4i tr\u01b0\u1eddng m\u00e0 v\u1ecf b\u1ecdc nema c\u00f3 th\u1ec3 x\u1eed l\u00fd.\u0110i\u1ec1u n\u00e0y quan tr\u1ecdng b\u1edfi v\u00ec OSHA 29 CFR 1910.305<\/a> y\u00eau c\u1ea7u r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c l\u1ed7 kh\u00f4ng s\u1eed d\u1ee5ng trong v\u1ecf \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u0111\u00f3ng l\u1ea1i m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, v\u00e0 c\u00e1c v\u1ecf b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n t\u1eed kh\u1ecfi m\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng c\u1ee7a m\u00f4i tr\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng. s\u1eed d\u1ee5ng \u0111\u00e1nh gi\u00e1 NEMA sai c\u00f3 th\u1ec3 g\u00e2y ra th\u00f4ng b\u00e1o vi ph\u1ea1m t\u1ea1i m\u1ed9t cu\u1ed9c ki\u1ec3m tra.<\/p>\n

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C\u00e1c lo\u1ea1i v\u00e0 x\u1ebfp h\u1ea1ng bao v\u00e2y NEMA: Bi\u1ec3u \u0111\u1ed3 so s\u00e1nh ho\u00e0n ch\u1ec9nh<\/h2>\n

\"C\u00e1c<\/a><\/p>\n

Bi\u1ec3u \u0111\u1ed3 n\u00e0y t\u00f3m t\u1eaft m\u1ecdi ph\u00e2n lo\u1ea1i v\u1ecf b\u1ecdc \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng nema 250 nema ch\u00ednh. M\u1ed7i danh s\u00e1ch ti\u1ebft l\u1ed9 li\u1ec7u v\u1ecf b\u1ecdc nema c\u00f3 ngh\u0129a l\u00e0 \u0111\u1ec3 s\u1eed d\u1ee5ng trong nh\u00e0, s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi hay c\u1ea3 \u2013 v\u00e0 nh\u1eefng m\u1ed1i nguy hi\u1ec3m b\u1ed5 sung n\u00e0o m\u00e0 n\u00f3 s\u1ebd ch\u1ed1ng l\u1ea1i. S\u1eed d\u1ee5ng bi\u1ec3u \u0111\u1ed3 n\u00e0y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh x\u1ebfp h\u1ea1ng nema n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec1u ki\u1ec7n c\u1ee7a b\u1ea1n tr\u01b0\u1edbc khi tham kh\u1ea3o \u00fd ki\u1ebfn nh\u00e0 s\u1ea3n xu\u1ea5t v\u1ecf b\u1ecdc.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Lo\u1ea1i NEMA<\/th>\nTrong nh\u00e0 \/Ngo\u00e0i tr\u1eddi<\/th>\nB\u1ea3o v\u1ec7 Cung c\u1ea5p<\/th>\nC\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/th>\n<\/tr>\n<\/thead>\n
Lo\u1ea1i 1<\/td>\nTrong nh\u00e0<\/td>\nB\u1ee5i b\u1ea9n r\u01a1i xu\u1ed1ng; li\u00ean h\u1ec7 nh\u00e2n s\u1ef1<\/td>\nB\u1ea3ng \u0111i\u1ec1u khi\u1ec3n trong nh\u00e0, ph\u00e2n ph\u1ed1i \u00e1nh s\u00e1ng<\/td>\n<\/tr>\n
Lo\u1ea1i 2<\/td>\nTrong nh\u00e0<\/td>\nB\u1ee5i b\u1ea9n r\u01a1i xu\u1ed1ng; n\u01b0\u1edbc nh\u1ecf gi\u1ecdt<\/td>\nKho b\u00e3i, c\u00f4ng nghi\u1ec7p nh\u1eb9<\/td>\n<\/tr>\n
Lo\u1ea1i 3<\/td>\nTrong nh\u00e0 \/Ngo\u00e0i tr\u1eddi<\/td>\nM\u01b0a, m\u01b0a \u0111\u00e1, tuy\u1ebft; b\u1ee5i gi\u00f3 th\u1ed5i; s\u1ef1 h\u00ecnh th\u00e0nh b\u0103ng<\/td>\nThi\u1ebft b\u1ecb ngo\u00e0i tr\u1eddi, T\u1ee7 ngo\u00e0i tr\u1eddi NEMA 3<\/a> \u0111\u1ed1i v\u1edbi vi\u1ec5n th\u00f4ng v\u00e0 ti\u1ec7n \u00edch<\/td>\n<\/tr>\n
Lo\u1ea1i 3R<\/td>\nTrong nh\u00e0 \/Ngo\u00e0i tr\u1eddi<\/td>\nM\u01b0a, m\u01b0a \u0111\u00e1, tuy\u1ebft; h\u00ecnh th\u00e0nh b\u0103ng (kh\u00f4ng c\u00f3 b\u1ea3o v\u1ec7 b\u1ee5i)<\/td>\nTi\u1ec7n \u00edch ngo\u00e0i tr\u1eddi ng\u1eaft k\u1ebft n\u1ed1i chuy\u1ec3n m\u1ea1ch, \u1ed5 c\u1eafm \u0111\u1ed3ng h\u1ed3 \u0111o<\/td>\n<\/tr>\n
Lo\u1ea1i 4<\/td>\nTrong nh\u00e0 \/Ngo\u00e0i tr\u1eddi<\/td>\nGi\u00f3 th\u1ed5i b\u1ee5i v\u00e0 m\u01b0a; gi\u1eadt g\u00e2n; n\u01b0\u1edbc h\u01b0\u1edbng v\u00f2i; b\u0103ng<\/td>\nTr\u1ea1m m\u00e1y c\u00f4ng c\u1ee5, khu v\u1ef1c r\u1eeda tr\u00f4i<\/td>\n<\/tr>\n
Lo\u1ea1i 4X<\/td>\nTrong nh\u00e0 \/Ngo\u00e0i tr\u1eddi<\/td>\nT\u01b0\u01a1ng t\u1ef1 nh\u01b0 Lo\u1ea1i 4 + ch\u1ed1ng \u0103n m\u00f2n<\/td>\nNh\u00e0 m\u00e1y th\u1ef1c ph\u1ea9m & \u0111\u1ed3 u\u1ed1ng, ch\u1ebf bi\u1ebfn h\u00f3a ch\u1ea5t, h\u00e0ng h\u1ea3i<\/td>\n<\/tr>\n
Lo\u1ea1i 5<\/td>\nTrong nh\u00e0<\/td>\nB\u1ee5i l\u1eafng, s\u1ee3i, x\u01a1 v\u1ea3i; n\u01b0\u1edbc nh\u1ecf gi\u1ecdt<\/td>\nNh\u00e0 m\u00e1y d\u1ec7t, x\u01b0\u1edfng ch\u1ebf bi\u1ebfn g\u1ed7<\/td>\n<\/tr>\n
Lo\u1ea1i 6<\/td>\nTrong nh\u00e0 \/Ngo\u00e0i tr\u1eddi<\/td>\nN\u01b0\u1edbc h\u01b0\u1edbng \u1ed1ng; ng\u1eadp n\u01b0\u1edbc n\u00f4ng t\u1ea1m th\u1eddi; b\u0103ng<\/td>\nM\u1ecf \u0111\u00e1, m\u1ecf, x\u1eed l\u00fd n\u01b0\u1edbc<\/td>\n<\/tr>\n
Lo\u1ea1i 6P<\/td>\nTrong nh\u00e0 \/Ngo\u00e0i tr\u1eddi<\/td>\nN\u01b0\u1edbc h\u01b0\u1edbng \u1ed1ng; ti\u1ebfp x\u00fac ch\u00ecm k\u00e9o d\u00e0i; b\u0103ng<\/td>\nM\u00e1y b\u01a1m ch\u00ecm, c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng b\u1ebfn t\u00e0u<\/td>\n<\/tr>\n
Lo\u1ea1i 12<\/td>\nTrong nh\u00e0<\/td>\nB\u1ee5i tu\u1ea7n ho\u00e0n, s\u1ee3i; n\u01b0\u1edbc nh\u1ecf gi\u1ecdt\/tung; th\u1ea5m d\u1ea7u<\/td>\nS\u00e0n s\u1ea3n xu\u1ea5t, \u0111i\u1ec1u khi\u1ec3n t\u1ef1 \u0111\u1ed9ng h\u00f3a, d\u00e2y chuy\u1ec1n \u0111\u00f3ng g\u00f3i<\/td>\n<\/tr>\n
Lo\u1ea1i 12K<\/td>\nTrong nh\u00e0<\/td>\nGi\u1ed1ng nh\u01b0 Lo\u1ea1i 12 (c\u00f3 lo\u1ea1i tr\u1ef1c ti\u1ebfp)<\/td>\nH\u1ed9p n\u1ed1i trong nh\u00e0 m\u00e1y c\u00f4ng nghi\u1ec7p<\/td>\n<\/tr>\n
Lo\u1ea1i 13<\/td>\nTrong nh\u00e0<\/td>\nB\u1ee5i; phun n\u01b0\u1edbc, d\u1ea7u, n\u01b0\u1edbc l\u00e0m m\u00e1t<\/td>\nV\u1ecf m\u00e1y c\u00f4ng c\u1ee5 CNC, d\u1eadp kim lo\u1ea1i<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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\ud83d\udca1<\/span> M\u1eb9o chuy\u00ean nghi\u1ec7p<\/strong><\/div>\n

H\u1eadu t\u1ed1 \u201cX\u201d 3X, 4X, 3RX, 3SX lu\u00f4n bi\u1ec3u th\u1ecb kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n th\u00eam.N\u1ebfu ti\u1ebfp x\u00fac v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n li\u00ean quan \u0111\u1ebfn phun mu\u1ed1i, kh\u00f3i h\u00f3a h\u1ecdc v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p r\u1eeda tr\u00f4i c\u00f3 t\u00ednh axit th\u00ec \u0111\u00e2y l\u00e0 x\u1ebfp h\u1ea1ng \u0111\u1ec3 ch\u1ec9 \u0111\u1ecbnh. v\u1ecf c\u00f3 th\u1ec3 s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 304 ho\u1eb7c 316 thay v\u00ec th\u00e9p carbon \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n.<\/p>\n<\/div>\n

Trong th\u1ecb tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p v\u00e0 th\u01b0\u01a1ng m\u1ea1i b\u1ed1n lo\u1ea1i nema ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 lo\u1ea1i 1 bao v\u00e2y cho c\u01a1 b\u1ea3n trong nh\u00e0, lo\u1ea1i 3R cho th\u1eddi ti\u1ebft ngo\u00e0i tr\u1eddi, lo\u1ea1i 4 v\u00e0 4X \u0111\u1ec3 r\u1eeda tr\u00f4i v\u00e0 \u0103n m\u00f2n, v\u00e0 lo\u1ea1i 12 cho s\u1eed d\u1ee5ng n\u1eb7ng trong nh\u00e0 v\u00e0 ngo\u00e0i tr\u1eddi trong c\u00e1c thi\u1ebft l\u1eadp c\u00f4ng nghi\u1ec7p. h\u01a1i \u00edt ph\u1ed5 bi\u1ebfn nh\u01b0ng quan tr\u1ecdng h\u01a1n \u0111\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng l\u00e0 lo\u1ea1i 6P bao v\u00e2y \u0111\u00e1nh gi\u00e1 cho ng\u1eadp s\u00e2u.<\/p>\n

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NEMA so v\u1edbi x\u1ebfp h\u1ea1ng IP: S\u1ef1 kh\u00e1c bi\u1ec7t l\u00e0 g\u00ec?<\/h2>\n

\"NEMA<\/a><\/p>\n

L\u00e0 t\u01b0 v\u1ea5n vi\u00ean, c\u00e1c k\u1ef9 s\u01b0 c\u1ee7a ch\u00fang t\u00f4i th\u01b0\u1eddng ch\u1ec9 \u0111\u1ecbnh thi\u1ebft b\u1ecb b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u1ed9t trong hai nema ho\u1eb7c x\u1ebfp h\u1ea1ng IP.Hai h\u1ec7 th\u1ed1ng chia s\u1ebb m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p t\u01b0\u01a1ng t\u1ef1 nh\u01b0ng v\u1ec1 c\u01a1 b\u1ea3n t\u1ef7 l\u1ec7 \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau.H\u1ecdc c\u00e1ch ch\u00fang kh\u00e1c nhau cho ph\u00e9p b\u1ea1n tr\u00e1nh c\u00e1c l\u1ed7i \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt d\u1eabn \u0111\u1ebfn h\u01b0 h\u1ecfng thi\u1ebft b\u1ecb ho\u1eb7c ki\u1ec3m tra kh\u00f4ng th\u00e0nh c\u00f4ng.<\/p>\n

X\u1ebfp h\u1ea1ng IP (B\u1ea3o v\u1ec7 ch\u1ed1ng x\u00e2m nh\u1eadp) t\u1eeb IEC 60529<\/a> ch\u1ec9 xem x\u00e9t hai y\u1ebfu t\u1ed1 b\u1ea3o v\u1ec7: s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a c\u00e1c h\u1ea1t r\u1eafn (ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean, 0-6) v\u00e0 s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a n\u01b0\u1edbc (ch\u1eef s\u1ed1 th\u1ee9 hai, 0-9K). V\u1ecf b\u1ecdc nema \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 d\u1ef1a tr\u00ean hai ti\u00eau ch\u00ed t\u01b0\u01a1ng t\u1ef1 nh\u01b0ng c\u0169ng xem x\u00e9t c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng kh\u00e1c \u2013 ti\u1ebfp x\u00fac v\u1edbi \u0103n m\u00f2n, phun d\u1ea7u v\u00e0 ch\u1ea5t l\u00e0m m\u00e1t, h\u00ecnh th\u00e0nh b\u0103ng tr\u00ean b\u1ec1 m\u1eb7t v\u00e0 t\u1ea1o ra n\u01b0\u1edbc h\u01b0\u1edbng \u1ed1ng c\u00f3 \u00e1p su\u1ea5t x\u00e1c \u0111\u1ecbnh.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Ti\u00eau ch\u00ed<\/th>\nNEMA (NEMA 250)<\/th>\nIP (IEC 60529)<\/th>\n<\/tr>\n<\/thead>\n
C\u01a1 quan ch\u1ee7 qu\u1ea3n<\/td>\nHi\u1ec7p h\u1ed9i c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111i\u1ec7n qu\u1ed1c gia (M\u1ef9\/Canada)<\/td>\n\u1ee6y ban K\u1ef9 thu\u1eadt \u0110i\u1ec7n Qu\u1ed1c t\u1ebf (To\u00e0n c\u1ea7u)<\/td>\n<\/tr>\n
B\u1ee5i \/S\u1ef1 x\u00e2m nh\u1eadp r\u1eafn<\/td>\nV\u00e2ng<\/td>\nC\u00f3 (ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean)<\/td>\n<\/tr>\n
N\u01b0\u1edbc x\u00e2m nh\u1eadp<\/td>\nV\u00e2ng<\/td>\nC\u00f3 (ch\u1eef s\u1ed1 th\u1ee9 hai)<\/td>\n<\/tr>\n
Ch\u1ed1ng \u0103n m\u00f2n<\/td>\nC\u00f3 (lo\u1ea1i 4X, 3X)<\/td>\nKh\u00f4ng<\/td>\n<\/tr>\n
B\u1ea3o v\u1ec7 d\u1ea7u\/ch\u1ea5t l\u00e0m m\u00e1t<\/td>\nC\u00f3 (Lo\u1ea1i 12, 13)<\/td>\nKh\u00f4ng<\/td>\n<\/tr>\n
S\u1ef1 h\u00ecnh th\u00e0nh b\u0103ng<\/td>\nC\u00f3 (Lo\u1ea1i 3, 3R, 4, 6)<\/td>\nKh\u00f4ng<\/td>\n<\/tr>\n
Khu v\u1ef1c s\u1eed d\u1ee5ng ch\u00ednh<\/td>\nB\u1eafc M\u1ef9<\/td>\nCh\u00e2u \u00c2u, Ch\u00e2u \u00c1, To\u00e0n c\u1ea7u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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\u26a0\ufe0f<\/span> Quan tr\u1ecdng<\/strong><\/div>\n

Kh\u00f4ng c\u00f3 m\u1ed1i t\u01b0\u01a1ng quan tr\u1ef1c ti\u1ebfp gi\u1eefa nema v\u00e0 x\u1ebfp h\u1ea1ng IP.M\u1ed9t v\u1ecf b\u1ecdc nema 4x c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng n\u01b0\u1edbc v\u00e0 b\u1ee5i t\u1ed1t h\u01a1n c\u1ea3 IP66.Tuy nhi\u00ean, n\u00f3 c\u0169ng cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n m\u00e0 x\u1ebfp h\u1ea1ng IP66 kh\u00f4ng ch\u1ec9 \u0111\u1ecbnh.B\u1ea1n c\u00f3 th\u1ec3 tuy\u00ean b\u1ed1 m\u1ed9t nema 4X v\u01b0\u1ee3t qu\u00e1 b\u1ea3o v\u1ec7 IP66 \u2013 nh\u01b0ng m\u1ed9t v\u1ecf b\u1ecdc IP66 kh\u00f4ng \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n l\u00e0 NEMA 4X v\u00ec kh\u00f4ng c\u00f3 \u0111\u00e1nh gi\u00e1 \u0103n m\u00f2n v\u00e0 x\u00e2y d\u1ef1ng.<\/p>\n<\/div>\n

M\u1ed9t so s\u00e1nh chung: nema 1 t\u01b0\u01a1ng \u1ee9ng v\u1edbi IP20 t\u1ed1i thi\u1ec3u th\u1ea5p nh\u1ea5t; nema 3R \u0111\u1ec1 c\u1eadp \u0111\u1ebfn x\u1ebfp h\u1ea1ng t\u1ed1i thi\u1ec3u IP14; nema 4x l\u00e0 66 t\u1ed1i thi\u1ec3u; nema 4x l\u00e0 66 t\u1ed1i thi\u1ec3u; nema 6P l\u00e0 68 t\u1ed1i thi\u1ec3u; v\u00e0 NEMA 12 l\u00e0 52 t\u1ed1i thi\u1ec3u. nh\u1eefng so s\u00e1nh n\u00e0y ph\u1ea3n \u00e1nh m\u1ee9c t\u1ed1i thi\u1ec3u \u2013 nema x\u1ebfp h\u1ea1ng th\u00eam l\u1ee3i \u00edch tr\u00ean m\u00e3 IP.Khi l\u00e0m vi\u1ec7c qu\u1ed1c t\u1ebf, b\u1ea1n n\u00ean x\u00e1c \u0111\u1ecbnh c\u1ea3 y\u00eau c\u1ea7u NEMA v\u00e0 IP v\u1edbi nh\u00e0 s\u1ea3n xu\u1ea5t bao v\u00e2y.<\/p>\n

<\/p>\n

C\u00e1ch ch\u1ecdn v\u1ecf NEMA ph\u00f9 h\u1ee3p cho \u0111\u01a1n \u0111\u0103ng k\u00fd c\u1ee7a b\u1ea1n<\/h2>\n

\"C\u00e1ch<\/a><\/p>\n

Khi ch\u1ecdn m\u1ed9t bao v\u00e2y nema, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi nema thi\u1ebft l\u1eadp cho bao v\u00e2y ch\u1ed1ng l\u1ea1i c\u00e1c r\u1ee7i ro m\u00f4i tr\u01b0\u1eddng t\u1ea1i v\u1ecb tr\u00ed c\u00e0i \u0111\u1eb7t. s\u1eed d\u1ee5ng c\u00e1c b\u01b0\u1edbc sau \u0111\u00e2y b\u1ea5t k\u1ec3 b\u1ea1n \u0111ang t\u00ecm ngu\u1ed3n cung \u1ee9ng m\u1ed9t t\u1ee7 ho\u1eb7c ch\u1ec9 \u0111\u1ecbnh h\u00e0ng tr\u0103m \u0111\u1ecba \u0111i\u1ec3m cho m\u1ed9t c\u01a1 s\u1edf m\u1edbi.<\/p>\n

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Khung l\u1ef1a ch\u1ecdn bao v\u00e2y NEMA 5 b\u01b0\u1edbc<\/strong><\/p>\n

    \n
  1. Ch\u1ec9 \u0111\u1ecbnh c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng \u0111\u1ec3 l\u1eafp \u0111\u1eb7t \u2013 trong nh\u00e0 ho\u1eb7c ngo\u00e0i tr\u1eddi? Ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9? M\u1ee9c \u0111\u1ed9 \u1ea9m? C\u00f3 bao nhi\u00eau b\u1ee5i b\u1ea9n, h\u00f3a ch\u1ea5t ho\u1eb7c s\u1ee3i l\u01a1 l\u1eedng trong kh\u00f4ng kh\u00ed?<\/li>\n
  2. X\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng n\u01b0\u1edbc v\u00e0 ch\u1ea5t l\u1ecfng ti\u1ebfp x\u00fac v\u1edbi khu v\u1ef1c bao quanh \u2013 li\u1ec7u n\u00f3 c\u00f3 b\u1ecb m\u01b0a, b\u1ecb v\u00f2i phun xu\u1ed1ng, b\u1ecb b\u1eafn tung t\u00f3e b\u1edfi thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t g\u1ea7n \u0111\u00f3 ho\u1eb7c c\u1ea7n ph\u1ea3i ng\u00e2m n\u01b0\u1edbc kh\u00f4ng? Nh\u1eefng t\u00ecnh hu\u1ed1ng ri\u00eang l\u1ebb n\u00e0y y\u00eau c\u1ea7u c\u00e1c lo\u1ea1i nema c\u1ee5 th\u1ec3.<\/li>\n
  3. X\u00e1c \u0111\u1ecbnh nguy c\u01a1 \u0103n m\u00f2n \u2013 s\u1ebd c\u00f3 phun kh\u00f4ng kh\u00ed mu\u1ed1i g\u1ea7n b\u1edd bi\u1ec3n, kh\u00f3i axit trong nh\u00e0 m\u00e1y h\u00f3a ch\u1ea5t ho\u1eb7c r\u1eeda clo trong ho\u1ea1t \u0111\u1ed9ng ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m? Nh\u1eefng t\u00ecnh hu\u1ed1ng n\u00e0y c\u1ea7n h\u1eadu t\u1ed1 \u201cX\u201d v\u00e0 th\u01b0\u1eddng l\u00e0 th\u00e9p kh\u00f4ng g\u1ec9.<\/li>\n
  4. H\u1ec7 s\u1ed1 trong h\u1ec7 s\u1ed1 c\u01a1 v\u00e0 nhi\u1ec7t \u2013 t\u1ea3i nhi\u1ec7t b\u00ean trong c\u00f3 th\u1ec3 y\u00eau c\u1ea7u th\u1ed5i nh\u01b0 qu\u1ea1t, m\u00e1y \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed ho\u1eb7c b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t; t\u00e1c \u0111\u1ed9ng b\u00ean ngo\u00e0i c\u00f3 th\u1ec3 y\u00eau c\u1ea7u v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng n\u1eb7ng h\u01a1n.<\/li>\n
  5. X\u00e1c \u0111\u1ecbnh ch\u1ee9ng nh\u1eadn c\u1ea7n thi\u1ebft \u2013 the Ti\u00eau chu\u1ea9n NFPA 70 (National Electrical Code)<\/a> v\u00e0 c\u01a1 quan c\u00f3 th\u1ea9m quy\u1ec1n c\u00f3 th\u1ec3 ch\u1ec9 \u0111\u1ecbnh lo\u1ea1i nema c\u1ea7n thi\u1ebft; c\u00e1c nh\u00e0 cung c\u1ea5p b\u1ea3o hi\u1ec3m v\u00e0 c\u01a1 quan ki\u1ec3m tra s\u1ebd mu\u1ed1n c\u00f3 danh s\u00e1ch UL v\u00e0 ch\u1ee9ng nh\u1eadn c\u1ee7a b\u00ean th\u1ee9 ba.<\/li>\n<\/ol>\n<\/div>\n

    Trong lo\u1ea1i NEMA \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh, v\u1ecf b\u1ecdc 4X cho \u0111\u1ebfn nay l\u00e0 lo\u1ea1i \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh qu\u00e1 m\u1ee9c nh\u1ea5t.M\u1ed9t s\u1ed1 c\u00e0i \u0111\u1eb7t s\u1ebd c\u00f3 l\u1ef1a ch\u1ecdn 4X ch\u1ec9 \u0111\u1ec3 an to\u00e0n.Tuy nhi\u00ean, s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 gi\u00e1 cho m\u1ed9t c\u00f4ng tr\u00ecnh b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 ch\u1ed1ng \u0103n m\u00f2n so v\u1edbi v\u1ecf b\u1ecdc nema 4 b\u1eb1ng th\u00e9p carbon c\u00f3 th\u1ec3 b\u1ecb c\u1ea5m.N\u1ebfu trang web c\u1ee7a b\u1ea1n kh\u00f4ng th\u1ea5y c\u00e1c y\u1ebfu t\u1ed1 \u0103n m\u00f2n \u2013 v\u00ed d\u1ee5: m\u1ed9t bao v\u00e2y ngo\u00e0i tr\u1eddi \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng NEMA 3<\/a> t\u1ea1i th\u00e1p di \u0111\u1ed9ng c\u00f3 kh\u00ed h\u1eadu kh\u00f4 - \u0111\u00f3 l\u00e0 s\u1ef1 b\u1ea3o v\u1ec7 b\u1ed5 sung m\u00e0 b\u1ea1n ph\u1ea3i tr\u1ea3 ti\u1ec1n m\u00e0 b\u1ea1n kh\u00f4ng bao gi\u1edd c\u1ea7n.<\/p>\n

    \n
    \ud83d\udca1<\/span> M\u1eb9o chuy\u00ean nghi\u1ec7p<\/strong><\/div>\n

    C\u00e1c ph\u1ed5 bi\u1ebfn nh\u1ea5t d\u01b0\u1edbi \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt nh\u00e2n vi\u00ean k\u1ef9 thu\u1eadt c\u1ee7a ch\u00fang t\u00f4i th\u1ea5y l\u00e0 b\u1ea3o v\u1ec7 b\u1ee5i.B\u1ea1n c\u00f3 th\u1ec3 l\u1eadp k\u1ebf ho\u1ea1ch tr\u00ean nema 3R cho c\u00e1c \u1ee9ng d\u1ee5ng ngo\u00e0i tr\u1eddi c\u1ee7a b\u1ea1n, nh\u01b0ng thi\u1ebfu b\u1ea3o v\u1ec7 b\u1ee5i b\u1ea9n gi\u00f3 th\u1ed5i c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t 3R s\u1ebd kh\u00f4ng l\u00e0m.N\u1ebfu trang web c\u1ee7a b\u1ea1n kh\u00f4 c\u1eb1n ho\u1eb7c x\u00e2y d\u1ef1ng-li\u1ec1n k\u1ec1, NEMA Lo\u1ea1i 3 ho\u1eb7c nema 4 n\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n<\/div>\n

    <\/p>\n

    Nh\u1eefng g\u00ec c\u1ea7n t\u00ecm trong m\u1ed9t nh\u00e0 s\u1ea3n xu\u1ea5t bao v\u00e2y NEMA<\/h2>\n

    \"Nh\u1eefng<\/a><\/p>\n

    Kh\u00f4ng ph\u1ea3i m\u1ecdi nh\u00e0 s\u1ea3n xu\u1ea5t bao v\u00e2y \u0111\u1ec1u cung c\u1ea5p ch\u1ea5t l\u01b0\u1ee3ng, th\u1eddi gian th\u1ef1c hi\u1ec7n ho\u1eb7c ph\u1ea1m vi ch\u1ee9ng nh\u1eadn th\u1ed1ng nh\u1ea5t. ti\u00eau ch\u00ed nghi\u00eam ng\u1eb7t khi t\u00ecm ngu\u1ed3n cung \u1ee9ng cho nh\u00e0 cung c\u1ea5p ti\u1ec1m n\u0103ng s\u1ebd gi\u00fap \u0111\u1ea3m b\u1ea3o c\u00e1c bao v\u00e2y \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng theo th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n r\u1eddi kh\u1ecfi b\u1ebfn t\u00e0u c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0o ng\u00e0y v\u1eadn chuy\u1ec3n d\u1ef1 ki\u1ebfn v\u00e0 ch\u1ea1y t\u1ed1t trong l\u0129nh v\u1ef1c n\u00e0y.<\/p>\n