{"id":21355,"date":"2026-01-19T02:29:35","date_gmt":"2026-01-18T18:29:35","guid":{"rendered":"https:\/\/viox.com\/?p=21355"},"modified":"2026-01-19T02:29:37","modified_gmt":"2026-01-18T18:29:37","slug":"rcd-vs-gfci-breaker-difference-iec-nec","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/rcd-vs-gfci-breaker-difference-iec-nec\/","title":{"rendered":"Aptomat ch\u1ed1ng d\u00f2ng r\u00f2 RCD so v\u1edbi aptomat ch\u1ed1ng d\u00f2ng r\u00f2 GFCI?"},"content":{"rendered":"<div class=\"product-intro\">\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 th\u1ea7u \u0111i\u1ec7n qu\u1ed1c t\u1ebf, nh\u00e0 s\u1ea3n xu\u1ea5t t\u1ee7 b\u1ea3ng \u0111i\u1ec7n v\u00e0 chuy\u00ean gia mua s\u1eafm, vi\u1ec7c \u0111i\u1ec1u h\u01b0\u1edbng c\u00e1c thu\u1eadt ng\u1eef gi\u1eefa ti\u00eau chu\u1ea9n IEC (Qu\u1ed1c t\u1ebf) v\u00e0 NEC (B\u1eafc M\u1ef9) c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t ngu\u1ed3n g\u00e2y kh\u00f3 ch\u1ecbu li\u00ean t\u1ee5c. \u0110i\u1ec3m g\u00e2y nh\u1ea7m l\u1eabn ph\u1ed5 bi\u1ebfn nh\u1ea5t? S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ed9t <strong>B\u1ed9 ng\u1eaft m\u1ea1ch RCD<\/strong> v\u00e0 m\u1ed9t <strong>B\u1ed9 ng\u1eaft m\u1ea1ch GFCI<\/strong>.<\/p>\n<p>Ch\u00fang c\u00f3 ph\u1ea3i l\u00e0 c\u00f9ng m\u1ed9t thi\u1ebft b\u1ecb kh\u00f4ng? B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1i n\u00e0y thay cho c\u00e1i kia kh\u00f4ng? T\u1ea1i sao m\u1ed9t c\u00e1i ng\u1eaft \u1edf 5mA v\u00e0 c\u00e1i kia \u1edf 30mA?<\/p>\n<p>H\u01b0\u1edbng d\u1eabn n\u00e0y lo\u1ea1i b\u1ecf r\u00e0o c\u1ea3n v\u1ec1 thu\u1eadt ng\u1eef, gi\u1ea3i th\u00edch s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 k\u1ef9 thu\u1eadt, ch\u1ee9c n\u0103ng v\u00e0 quy \u0111\u1ecbnh gi\u1eefa hai thi\u1ebft b\u1ecb an to\u00e0n quan tr\u1ecdng n\u00e0y. Cho d\u00f9 b\u1ea1n \u0111ang ch\u1ec9 \u0111\u1ecbnh m\u1ed9t d\u1ef1 \u00e1n \u1edf Dubai (IEC) hay Dallas (NEC), vi\u1ec7c hi\u1ec3u nh\u1eefng s\u1eafc th\u00e1i n\u00e0y l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 tu\u00e2n th\u1ee7 an to\u00e0n v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<h2>S\u1ef1 th\u1eadt c\u1ed1t l\u00f5i: C\u00f9ng m\u1ed9t c\u00f4ng ngh\u1ec7, t\u00ean g\u1ecdi kh\u00e1c nhau<\/h2>\n<p>V\u1ec1 b\u1ea3n ch\u1ea5t, c\u1ea3 RCD v\u00e0 GFCI \u0111\u1ec1u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 c\u1ee9u s\u1ed1ng ng\u01b0\u1eddi b\u1eb1ng c\u00e1ch ph\u00e1t hi\u1ec7n <strong>d\u00f2ng \u0111i\u1ec7n r\u00f2 r\u1ec9 xu\u1ed1ng \u0111\u1ea5t<\/strong>\u2014\u0111i\u1ec7n r\u00f2 r\u1ec9 t\u1eeb m\u1ea1ch xu\u1ed1ng \u0111\u1ea5t, th\u01b0\u1eddng l\u00e0 qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi.<\/p>\n<p>C\u1ea3 hai thi\u1ebft b\u1ecb \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean c\u00f9ng m\u1ed9t nguy\u00ean t\u1eafc v\u1eadt l\u00fd c\u01a1 b\u1ea3n: <strong>\u0110\u1ecbnh lu\u1eadt d\u00f2ng \u0111i\u1ec7n Kirchhoff<\/strong>. Ch\u00fang theo d\u00f5i d\u00f2ng \u0111i\u1ec7n \u0111i ra tr\u00ean d\u00e2y d\u1eabn tr\u1ef1c ti\u1ebfp (n\u00f3ng) v\u00e0 so s\u00e1nh n\u00f3 v\u1edbi d\u00f2ng \u0111i\u1ec7n tr\u1edf v\u1ec1 tr\u00ean d\u00e2y d\u1eabn trung t\u00ednh. Trong m\u1ed9t m\u1ea1ch kh\u1ecfe m\u1ea1nh, c\u00e1c d\u00f2ng \u0111i\u1ec7n n\u00e0y b\u1eb1ng nhau. N\u1ebfu ch\u00fang kh\u00e1c nhau, d\u00f2ng \u0111i\u1ec7n \u0111ang r\u00f2 r\u1ec9 \u1edf \u0111\u00e2u \u0111\u00f3 kh\u00f4ng n\u00ean.<\/p>\n<ul>\n<li><strong>RCD (Thi\u1ebft b\u1ecb d\u00f2ng d\u01b0):<\/strong> \u0110\u00e2y l\u00e0 thu\u1eadt ng\u1eef chung \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi <strong>IEC (\u1ee6y ban K\u1ef9 thu\u1eadt \u0110i\u1ec7n Qu\u1ed1c t\u1ebf)<\/strong>. N\u00f3 bao g\u1ed3m m\u1ed9t h\u1ecd c\u00e1c thi\u1ebft b\u1ecb bao g\u1ed3m RCCB v\u00e0 RCBO. Thu\u1eadt ng\u1eef \u201cD\u01b0\u201d \u0111\u1ec1 c\u1eadp \u0111\u1ebfn d\u00f2ng \u0111i\u1ec7n \u201cc\u00f2n s\u00f3t l\u1ea1i\u201d kh\u00f4ng tr\u1edf l\u1ea1i qua d\u00e2y trung t\u00ednh.<\/li>\n<li><strong>GFCI (B\u1ed9 ng\u1eaft m\u1ea1ch l\u1ed7i n\u1ed1i \u0111\u1ea5t):<\/strong> \u0110\u00e2y l\u00e0 thu\u1eadt ng\u1eef c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong <strong>B\u1eafc M\u1ef9 (ti\u00eau chu\u1ea9n NEC\/UL)<\/strong>. N\u00f3 nh\u1ea5n m\u1ea1nh <em>s\u1ef1 c\u1ed1<\/em> \u0111i\u1ec1u ki\u1ec7n (l\u1ed7i ch\u1ea1m \u0111\u1ea5t) h\u01a1n l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111o.<\/li>\n<\/ul>\n<p>M\u1eb7c d\u00f9 v\u1eadt l\u00fd l\u00e0 gi\u1ed1ng h\u1ec7t nhau, nh\u01b0ng <strong>vi\u1ec7c tri\u1ec3n khai, \u0111\u1ed9 nh\u1ea1y v\u00e0 \u0111\u1eb7c t\u00ednh ng\u1eaft m\u1ea1ch<\/strong> kh\u00e1c nhau \u0111\u00e1ng k\u1ec3 do tri\u1ebft l\u00fd an to\u00e0n kh\u00e1c nhau gi\u1eefa B\u1eafc M\u1ef9 v\u00e0 ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a th\u1ebf gi\u1edbi.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-diagram-comparing-RCD-and-GFCI-internal-residual-current-detection-mechanisms-showing-identical-working-principles-with-current-transformer-and-trip-relay.webp\" alt=\"Technical diagram comparing RCD and GFCI internal residual current detection mechanisms showing identical working principles with current transformer and trip relay\" \/><figcaption style=\"font-style: italic; margin-top: 10px; color: #555;\">S\u01a1 \u0111\u1ed3 k\u1ef9 thu\u1eadt cho th\u1ea5y c\u00e1c nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng b\u00ean trong gi\u1ed1ng h\u1ec7t nhau c\u1ee7a c\u01a1 ch\u1ebf ph\u00e1t hi\u1ec7n RCD (IEC) v\u00e0 GFCI (UL 943).<\/figcaption><\/figure>\n<h2>Ph\u00e2n t\u00edch thu\u1eadt ng\u1eef: H\u1ecd RCD so v\u1edbi H\u1ecd GFCI<\/h2>\n<p>S\u1ef1 nh\u1ea7m l\u1eabn th\u01b0\u1eddng b\u1eaft ngu\u1ed3n t\u1eeb th\u1ef1c t\u1ebf l\u00e0 \u201cRCD\u201d l\u00e0 m\u1ed9t danh m\u1ee5c, trong khi \u201cGFCI\u201d th\u01b0\u1eddng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed9t \u0111\u1ecbnh d\u1ea1ng s\u1ea3n ph\u1ea9m c\u1ee5 th\u1ec3. \u0110\u1ec3 l\u00e0m r\u00f5, ch\u00fang ta ph\u1ea3i xem x\u00e9t c\u00e1ch c\u00e1c ch\u1ee9c n\u0103ng n\u00e0y \u0111\u01b0\u1ee3c \u0111\u00f3ng g\u00f3i.<\/p>\n<p>\u0110\u1ec3 t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 c\u00e1c ch\u1eef vi\u1ebft t\u1eaft n\u00e0y, h\u00e3y tham kh\u1ea3o h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/test.viox.com\/vi\/electrical-alphabet-soup-mccb-vs-rccb-explained\/\">B\u1ea3ng ch\u1eef c\u00e1i \u0111i\u1ec7n: Gi\u1ea3i th\u00edch v\u1ec1 MCCB so v\u1edbi RCCB<\/a>.<\/p>\n<h3>So s\u00e1nh thu\u1eadt ng\u1eef to\u00e0n c\u1ea7u<\/h3>\n<table style=\"width: 100%; border-collapse: collapse;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>Thu\u1eadt ng\u1eef IEC \/ Qu\u1ed1c t\u1ebf<\/th>\n<th>Thu\u1eadt ng\u1eef B\u1eafc M\u1ef9 (UL\/NEC)<\/th>\n<th>Ch\u1ee9c n\u0103ng<\/th>\n<th>Ti\u00eau chu\u1ea9n ch\u00ednh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>TI\u00caN<\/strong> (Thu\u1eadt ng\u1eef chung)<\/td>\n<td><strong>B\u1ea3o v\u1ec7 ch\u1ed1ng ch\u1ea1m \u0111\u1ea5t<\/strong><\/td>\n<td>Thu\u1eadt ng\u1eef chung cho b\u1ea3o v\u1ec7 r\u00f2 r\u1ec9.<\/td>\n<td>IEC 61008 \/ UL 943<\/td>\n<\/tr>\n<tr>\n<td><strong>RCCB<\/strong> (B\u1ed9 ng\u1eaft m\u1ea1ch d\u00f2ng d\u01b0)<\/td>\n<td><em>Kh\u00f4ng c\u00f3 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng tr\u1ef1c ti\u1ebfp<\/em> (g\u1ea7n nh\u1ea5t l\u00e0 c\u00f4ng t\u1eafc GFCI \u0111\u1ed9c l\u1eadp, hi\u1ebfm)<\/td>\n<td>Cung c\u1ea5p b\u1ea3o v\u1ec7 r\u00f2 r\u1ec9 <strong>CH\u1ec8<\/strong>. Ph\u1ea3i \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i v\u1edbi m\u1ed9t <a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">MCB<\/a>.<\/td>\n<td>TRUY\u1ec0N th\u00f4ng 61008-1<\/td>\n<\/tr>\n<tr>\n<td><strong>RCBO<\/strong> (B\u1ed9 ng\u1eaft m\u1ea1ch d\u00f2ng d\u01b0 c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng)<\/td>\n<td><strong>B\u1ed9 ng\u1eaft m\u1ea1ch GFCI<\/strong><\/td>\n<td>K\u1ebft h\u1ee3p b\u1ea3o v\u1ec7 r\u00f2 r\u1ec9 + qu\u00e1 t\u1ea3i + b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch.<\/td>\n<td>IEC 61009-1 \/ UL 943<\/td>\n<\/tr>\n<tr>\n<td><em>Kh\u00f4ng c\u00f3 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng tr\u1ef1c ti\u1ebfp<\/em> (SRCD t\u1ed3n t\u1ea1i nh\u01b0ng r\u1ea5t hi\u1ebfm)<\/td>\n<td><strong>\u1ed4 c\u1eafm GFCI<\/strong> (\u1ed4 c\u1eafm)<\/td>\n<td>B\u1ea3o v\u1ec7 r\u00f2 r\u1ec9 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u00e0o \u1ed5 c\u1eafm tr\u00ean t\u01b0\u1eddng.<\/td>\n<td>Ti\u00eau chu\u1ea9n UL943<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>C\u00e1ch ti\u1ebfp c\u1eadn IEC (RCD)<\/h3>\n<p>T\u1ea1i c\u00e1c th\u1ecb tr\u01b0\u1eddng IEC (Ch\u00e2u \u00c2u, Ch\u00e2u \u00c1, \u00dac), vi\u1ec7c b\u1ea3o v\u1ec7 th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia nh\u1ecf. B\u1ea1n c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t <strong>RCCB<\/strong> b\u1ea3o v\u1ec7 m\u1ed9t nh\u00f3m m\u1ea1ch, ho\u1eb7c m\u1ed9t <strong>RCBO<\/strong> b\u1ea3o v\u1ec7 m\u1ed9t m\u1ea1ch quan tr\u1ecdng duy nh\u1ea5t. \u0110i\u1ec1u quan tr\u1ecdng l\u00e0, RCCB <em>kh\u00f4ng th\u1ec3<\/em> b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 t\u1ea3i; n\u00f3 s\u1ebd ch\u00e1y n\u1ebfu d\u00f2ng \u0111i\u1ec7n v\u01b0\u1ee3t qu\u00e1 \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3. N\u00f3 ph\u1ea3i lu\u00f4n \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i v\u1edbi c\u1ea7u ch\u00ec ho\u1eb7c MCB \u1edf th\u01b0\u1ee3ng ngu\u1ed3n. Xem <a href=\"https:\/\/test.viox.com\/vi\/rcd-vs-mcb-understanding-the-key-differences-in-electrical-protection-devices\/\">RCD so v\u1edbi MCB<\/a> \u0111\u1ec3 bi\u1ebft th\u00eam chi ti\u1ebft.<\/p>\n<h3>C\u00e1ch ti\u1ebfp c\u1eadn c\u1ee7a B\u1eafc M\u1ef9 (GFCI)<\/h3>\n<p>\u1ede Hoa K\u1ef3 v\u00e0 Canada, <strong>B\u1ed9 ng\u1eaft m\u1ea1ch GFCI<\/strong> l\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng tr\u1ef1c ti\u1ebfp c\u1ee7a RCBO\u2014n\u00f3 x\u1eed l\u00fd m\u1ecdi th\u1ee9 (qu\u00e1 t\u1ea3i, ng\u1eafn m\u1ea1ch, l\u1ed7i ch\u1ea1m \u0111\u1ea5t) trong m\u1ed9t g\u00f3i \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t trong b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n. Tuy nhi\u00ean, thi\u1ebft b\u1ecb ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 <strong>\u1ed4 c\u1eafm GFCI<\/strong>, n\u01a1i \u0111\u1eb7t b\u1ea3o v\u1ec7 ngay t\u1ea1i \u0111i\u1ec3m s\u1eed d\u1ee5ng (v\u00ed d\u1ee5: \u1ed5 c\u1eafm ph\u00f2ng t\u1eafm).<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Side-by-side-comparison-of-VIOX-RCCB-residual-current-device-in-IEC-format-versus-GFCI-circuit-breaker-in-North-American-UL-format-showing-design-differences.webp\" alt=\"Side-by-side comparison of VIOX RCCB residual current device in IEC format versus GFCI circuit breaker in North American UL format showing design differences\" \/><figcaption style=\"font-style: italic; margin-top: 10px; color: #555;\">So s\u00e1nh tr\u1ef1c quan: VIOX RCCB (\u0111\u1ecbnh d\u1ea1ng IEC) so v\u1edbi B\u1ed9 ng\u1eaft m\u1ea1ch GFCI (\u0111\u1ecbnh d\u1ea1ng B\u1eafc M\u1ef9).<\/figcaption><\/figure>\n<h2>S\u1ef1 kh\u00e1c bi\u1ec7t quan tr\u1ecdng: Ng\u01b0\u1ee1ng \u0111\u1ed9 nh\u1ea1y<\/h2>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t k\u1ef9 thu\u1eadt quan tr\u1ecdng nh\u1ea5t gi\u1eefa RCD v\u00e0 GFCI l\u00e0 <strong>\u0111\u1ed9 nh\u1ea1y<\/strong>. \u0110i\u1ec1u n\u00e0y quy\u1ebft \u0111\u1ecbnh n\u01a1i v\u00e0 c\u00e1ch ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n<table style=\"width: 100%; border-collapse: collapse;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>Tham s\u1ed1<\/th>\n<th>RCD (Ti\u00eau chu\u1ea9n IEC)<\/th>\n<th>GFCI (Ti\u00eau chu\u1ea9n B\u1eafc M\u1ef9)<\/th>\n<th>Ghi ch\u00fa<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Ng\u01b0\u1ee1ng ng\u1eaft<\/strong><\/td>\n<td><strong>30mA<\/strong> (\u0110i\u1ec3n h\u00ecnh)<\/td>\n<td><strong>5mA<\/strong> (\u00b11mA)<\/td>\n<td>GFCI nh\u1ea1y h\u01a1n 6 l\u1ea7n.<\/td>\n<\/tr>\n<tr>\n<td><strong>M\u1ee5c ti\u00eau ch\u00ednh<\/strong><\/td>\n<td>Ng\u0103n ng\u1eeba rung t\u00e2m th\u1ea5t g\u00e2y ch\u1ebft ng\u01b0\u1eddi (b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt).<\/td>\n<td>Ng\u0103n ng\u1eeba <em>b\u1ea5t k\u1ef3<\/em> c\u1ea3m gi\u00e1c b\u1ecb \u0111i\u1ec7n gi\u1eadt (ph\u1ea3n \u1ee9ng gi\u1eadt m\u00ecnh).<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><strong>Phi\u1ec1n To\u00e1i V\u1ea5p Ng\u00e3<\/strong><\/td>\n<td>R\u1ee7i ro th\u1ea5p. 30mA cho ph\u00e9p r\u00f2 r\u1ec9 c\u00e1p t\u1ef1 nhi\u00ean.<\/td>\n<td>R\u1ee7i ro cao tr\u00ean c\u00e1c \u0111\u01b0\u1eddng c\u00e1p d\u00e0i do r\u00f2 r\u1ec9 \u0111i\u1ec7n dung.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><strong>Th\u1eddi gian chuy\u1ebfn \u0111i<\/strong><\/td>\n<td>&lt; 300ms (T\u1ee9c th\u1eddi)<\/td>\n<td>&lt; 25ms (\u1edf c\u00e1c l\u1ed7i cao h\u01a1n)<\/td>\n<td>GFCI th\u01b0\u1eddng t\u00e1c \u0111\u1ed9ng nhanh h\u01a1n.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>T\u1ea1i sao c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t?<\/strong><br \/>\nTi\u00eau chu\u1ea9n B\u1eafc M\u1ef9 (UL 943) \u01b0u ti\u00ean ng\u01b0\u1ee1ng \u201cBu\u00f4ng tay\u201d. M\u1ed9t c\u00fa s\u1ed1c 5mA g\u00e2y \u0111au \u0111\u1edbn nh\u01b0ng cho ph\u00e9p m\u1ed9t ng\u01b0\u1eddi bu\u00f4ng d\u00e2y \u0111i\u1ec7n ra. Ti\u00eau chu\u1ea9n IEC (IEC 60479) nh\u1eadn th\u1ea5y r\u1eb1ng m\u1eb7c d\u00f9 30mA l\u00e0 m\u1ed9t c\u00fa s\u1ed1c \u0111\u00e1ng k\u1ec3, nh\u01b0ng n\u00f3 th\u01b0\u1eddng d\u01b0\u1edbi ng\u01b0\u1ee1ng rung t\u00e2m th\u1ea5t (ng\u1eebng tim) trong m\u1ed9t th\u1eddi gian ng\u1eafn.<\/p>\n<p>IEC \u0111\u00e3 ch\u1ecdn 30mA \u0111\u1ec3 cho ph\u00e9p b\u1ea3o v\u1ec7 \u201cto\u00e0n b\u1ed9 ng\u00f4i nh\u00e0\u201d ho\u1eb7c \u201cto\u00e0n b\u1ed9 m\u1ea1ch\u201d m\u00e0 kh\u00f4ng g\u00e2y ra c\u00e1c s\u1ef1 c\u1ed1 t\u00e1c \u0111\u1ed9ng gi\u1ea3 li\u00ean t\u1ee5c do d\u00f2ng \u0111i\u1ec7n r\u00f2 r\u1ec9 t\u1ef1 nhi\u00ean c\u1ee7a b\u1ed9 ngu\u1ed3n m\u00e1y t\u00ednh v\u00e0 c\u00e1c \u0111\u01b0\u1eddng c\u00e1p d\u00e0i. NEC \u0111\u00e3 ch\u1ecdn 5mA \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n t\u1ed1i \u0111a, nh\u01b0ng \u0111i\u1ec1u n\u00e0y th\u01b0\u1eddng bu\u1ed9c ph\u1ea3i l\u1eafp \u0111\u1eb7t b\u1ea3o v\u1ec7 t\u1ea1i \u1ed5 c\u1eafm (\u1ed4 c\u1eafm GFCI) thay v\u00ec b\u1ea3ng \u0111i\u1ec7n, \u0111\u1ec3 gi\u1ea3m thi\u1ec3u chi\u1ec1u d\u00e0i c\u00e1p v\u00e0 s\u1ef1 t\u00edch t\u1ee5 r\u00f2 r\u1ec9.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Comparative-sensitivity-chart-showing-GFCI-5mA-versus-RCD-30mA-trip-thresholds-with-human-safety-impact-zones-and-application-recommendations.webp\" alt=\"Comparative sensitivity chart showing GFCI 5mA versus RCD 30mA trip thresholds with human safety impact zones and application recommendations\" \/><figcaption style=\"font-style: italic; margin-top: 10px; color: #555;\">Thang \u0111\u1ed9 nh\u1ea1y: So s\u00e1nh c\u00e1c v\u00f9ng \u1ea3nh h\u01b0\u1edfng an to\u00e0n c\u1ee7a con ng\u01b0\u1eddi gi\u1eefa ti\u00eau chu\u1ea9n UL 943 GFCI (5mA) v\u00e0 IEC RCD (30mA).<\/figcaption><\/figure>\n<h2>Tri\u1ebft l\u00fd tri\u1ec3n khai: \u0110i\u1ec3m s\u1eed d\u1ee5ng so v\u1edbi To\u00e0n m\u1ea1ch<\/h2>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111\u1ed9 nh\u1ea1y th\u00fac \u0111\u1ea9y hai tri\u1ebft l\u00fd c\u00e0i \u0111\u1eb7t ri\u00eang bi\u1ec7t.<\/p>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn B\u1eafc M\u1ef9 (NEC): \u0110i\u1ec3m s\u1eed d\u1ee5ng<\/h3>\n<p>V\u00ec 5mA qu\u00e1 nh\u1ea1y, GFCI theo truy\u1ec1n th\u1ed1ng \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t <strong>c\u00e0ng g\u1ea7n t\u1ea3i c\u00e0ng t\u1ed1t<\/strong>\u2014th\u01b0\u1eddng l\u00e0 \u1ed5 c\u1eafm trong ph\u00f2ng t\u1eafm ho\u1eb7c nh\u00e0 b\u1ebfp. \u0110i\u1ec1u n\u00e0y ng\u0103n thi\u1ebft b\u1ecb t\u00e1c \u0111\u1ed9ng do r\u00f2 r\u1ec9 t\u00edch l\u0169y c\u1ee7a 50 feet c\u00e1p Romex. M\u1eb7c d\u00f9 c\u00f3 c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch GFCI, nh\u01b0ng ch\u00fang \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n trong c\u00e1c ng\u00f4i nh\u00e0 c\u0169 h\u01a1n so v\u1edbi \u1ed5 c\u1eafm GFCI.<\/p>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn IEC: B\u1ea3o v\u1ec7 to\u00e0n m\u1ea1ch<\/h3>\n<p>V\u1edbi ng\u01b0\u1ee1ng 30mA, RCD c\u00f3 th\u1ec3 tho\u1ea3i m\u00e1i b\u1ea3o v\u1ec7 to\u00e0n b\u1ed9 m\u1ea1ch ho\u1eb7c th\u1eadm ch\u00ed m\u1ed9t nh\u00f3m m\u1ea1ch t\u1eeb b\u1ea3ng ph\u00e2n ph\u1ed1i (b\u1ed9 ti\u00eau th\u1ee5). \u0110i\u1ec1u n\u00e0y t\u1eadp trung b\u1ea3o v\u1ec7, gi\u00fap d\u1ec5 d\u00e0ng \u0111\u1eb7t l\u1ea1i v\u00e0 qu\u1ea3n l\u00fd h\u01a1n.<\/p>\n<table style=\"width: 100%; border-collapse: collapse;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>N\u0103ng<\/th>\n<th>Ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn B\u1eafc M\u1ef9 (GFCI)<\/th>\n<th>Ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn IEC (RCD)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>V\u1ecb tr\u00ed<\/strong><\/td>\n<td>\u1ed4 c\u1eafm tr\u00ean t\u01b0\u1eddng (\u1ed4 c\u1eafm) ho\u1eb7c B\u1ea3ng \u0111i\u1ec7n<\/td>\n<td>B\u1ea3ng ph\u00e2n ph\u1ed1i (B\u1ea3ng \u0111i\u1ec7n)<\/td>\n<\/tr>\n<tr>\n<td><strong>Ph\u1ea1m vi<\/strong><\/td>\n<td>C\u00e1c v\u1ecb tr\u00ed nguy hi\u1ec3m c\u1ee5 th\u1ec3 (khu v\u1ef1c \u1ea9m \u01b0\u1edbt)<\/td>\n<td>T\u1ea5t c\u1ea3 c\u00e1c m\u1ea1ch \u1ed5 c\u1eafm (v\u00e0 ng\u00e0y c\u00e0ng nhi\u1ec1u \u00e1nh s\u00e1ng)<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ea3o tr\u00ec<\/strong><\/td>\n<td>Ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i ki\u1ec3m tra t\u1eebng \u1ed5 c\u1eafm h\u00e0ng th\u00e1ng<\/td>\n<td>Ng\u01b0\u1eddi d\u00f9ng ki\u1ec3m tra thi\u1ebft b\u1ecb t\u1ea1i b\u1ea3ng \u0111i\u1ec7n ch\u00ednh<\/td>\n<\/tr>\n<tr>\n<td><strong>Chi ph\u00ed<\/strong><\/td>\n<td>Th\u1ea5p h\u01a1n (\u1ed5 c\u1eafm r\u1ebb)<\/td>\n<td>Cao h\u01a1n (thi\u1ebft b\u1ecb b\u1ea3ng \u0111i\u1ec7n l\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Electrical-distribution-diagram-comparing-North-American-point-of-use-GFCI-receptacle-installation-versus-IEC-whole-circuit-RCD-protection-from-distribution-panel.webp\" alt=\"Electrical distribution diagram comparing North American point-of-use GFCI receptacle installation versus IEC whole-circuit RCD protection from distribution panel\" \/><figcaption style=\"font-style: italic; margin-top: 10px; color: #555;\">S\u01a1 \u0111\u1ed3 minh h\u1ecda s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e0i \u0111\u1eb7t GFCI \u0110i\u1ec3m s\u1eed d\u1ee5ng c\u1ee7a B\u1eafc M\u1ef9 v\u00e0 b\u1ea3o v\u1ec7 RCD C\u1ea5p m\u1ea1ch IEC.<\/figcaption><\/figure>\n<h2>Ma tr\u1eadn ti\u00eau chu\u1ea9n v\u00e0 tu\u00e2n th\u1ee7<\/h2>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 nh\u00e0 nh\u1eadp kh\u1ea9u, vi\u1ec7c bi\u1ebft ti\u00eau chu\u1ea9n quan tr\u1ecdng h\u01a1n l\u00e0 bi\u1ebft t\u00ean. B\u1ea1n kh\u00f4ng th\u1ec3 b\u00e1n RCD IEC \u1edf th\u1ecb tr\u01b0\u1eddng Hoa K\u1ef3 v\u1edbi t\u00ean g\u1ecdi \u201cGFCI\u201d tr\u1eeb khi n\u00f3 v\u01b0\u1ee3t qua UL 943, m\u00e0 h\u1ea7u h\u1ebft c\u00e1c RCD 30mA s\u1ebd kh\u00f4ng \u0111\u1ea1t do y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 nh\u1ea1y.<\/p>\n<table style=\"width: 100%; border-collapse: collapse;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>Lo\u1ea1i thi\u1ebft b\u1ecb<\/th>\n<th>Ti\u00eau chu\u1ea9n ch\u00ednh<\/th>\n<th>Nh\u1ea1y c\u1ea3m<\/th>\n<th>Y\u00eau c\u1ea7u ki\u1ec3m tra<\/th>\n<th>Ch\u1ee9ng nh\u1eadn<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>GFCI<\/strong><\/td>\n<td><strong>Ti\u00eau chu\u1ea9n UL943<\/strong> \/ CSA C22.2<\/td>\n<td><strong>5mA<\/strong> \u00b11mA<\/td>\n<td>H\u00e0ng th\u00e1ng (Y\u00eau c\u1ea7u t\u1ef1 \u0111\u1ed9ng gi\u00e1m s\u00e1t trong c\u00e1c phi\u00ean b\u1ea3n m\u1edbi)<\/td>\n<td>UL \/ ETL \/ CSA<\/td>\n<\/tr>\n<tr>\n<td><strong>RCCB<\/strong><\/td>\n<td><strong>TRUY\u1ec0N th\u00f4ng 61008-1<\/strong><\/td>\n<td>10, 30, 100, 300mA<\/td>\n<td>\u0110\u1ecbnh k\u1ef3 (N\u00fat ki\u1ec3m tra)<\/td>\n<td>CE \/ CB \/ KEMA<\/td>\n<\/tr>\n<tr>\n<td><strong>RCBO<\/strong><\/td>\n<td><strong>IEC 61009-1<\/strong><\/td>\n<td>10, 30, 100, 300mA<\/td>\n<td>\u0110\u1ecbnh k\u1ef3 (N\u00fat ki\u1ec3m tra)<\/td>\n<td>CE \/ CB \/ CCC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>L\u01b0u \u00fd v\u1ec1 tu\u00e2n th\u1ee7 ch\u00e9o:<\/strong> RCD 30mA c\u00f3 <strong>kh\u00f4ng<\/strong> \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a NEC v\u1ec1 b\u1ea3o v\u1ec7 con ng\u01b0\u1eddi trong ph\u00f2ng t\u1eafm\/nh\u00e0 b\u1ebfp (y\u00eau c\u1ea7u 5mA). Ng\u01b0\u1ee3c l\u1ea1i, GFCI 5mA \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t trong m\u1ed9t ng\u00f4i nh\u00e0 \u1edf Ch\u00e2u \u00c2u c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c s\u1ef1 c\u1ed1 t\u00e1c \u0111\u1ed9ng gi\u1ea3 v\u00f4 t\u1eadn do c\u00e1c b\u1ed1 tr\u00ed n\u1ed1i \u0111\u1ea5t kh\u00e1c nhau v\u00e0 d\u00f2ng \u0111i\u1ec7n r\u00f2 r\u1ec9 cho ph\u00e9p.<\/p>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 ti\u00eau chu\u1ea9n IEC, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/iec-61008-1-standard-rccb-requirements-explained\/\">Ti\u00eau chu\u1ea9n IEC 61008-1: Gi\u1ea3i th\u00edch c\u00e1c y\u00eau c\u1ea7u RCCB<\/a>.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Electrical-contractor-installing-VIOX-RCD-and-GFCI-protection-devices-in-commercial-distribution-panel-showing-both-IEC-and-North-American-formats.webp\" alt=\"Electrical contractor installing VIOX RCD and GFCI protection devices in commercial distribution panel showing both IEC and North American formats\" \/><figcaption style=\"font-style: italic; margin-top: 10px; color: #555;\">Nh\u00e0 th\u1ea7u l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 VIOX: Hi\u1ec3n th\u1ecb c\u1ea3 \u0111\u1ecbnh d\u1ea1ng IEC v\u00e0 B\u1eafc M\u1ef9 c\u1ea1nh nhau trong m\u1ed9t b\u1ea3ng \u0111i\u1ec7n th\u01b0\u01a1ng m\u1ea1i.<\/figcaption><\/figure>\n<h2>Khi n\u00e0o n\u00ean ch\u1ecdn RCD so v\u1edbi GFCI<\/h2>\n<p>L\u1ef1a ch\u1ecdn n\u00e0y h\u1ea7u nh\u01b0 lu\u00f4n \u0111\u01b0\u1ee3c quy\u1ebft \u0111\u1ecbnh b\u1edfi <strong>\u0111\u1ecba l\u00fd v\u00e0 quy t\u1eafc \u0111\u1ecba ph\u01b0\u01a1ng<\/strong>.<\/p>\n<ol>\n<li><strong>B\u1eafc M\u1ef9 (Hoa K\u1ef3, Canada, Mexico):<\/strong> B\u1ea1n ph\u1ea3i s\u1eed d\u1ee5ng <strong>GFCI<\/strong>.\n<ul>\n<li>S\u1eed d\u1ee5ng <strong>\u1ed4 c\u1eafm GFCI<\/strong> \u0111\u1ec3 trang b\u1ecb th\u00eam ho\u1eb7c c\u00e1c v\u1ecb tr\u00ed \u1ea9m \u01b0\u1edbt c\u1ee5 th\u1ec3.<\/li>\n<li>S\u1eed d\u1ee5ng <strong>B\u1ed9 ng\u1eaft m\u1ea1ch GFCI<\/strong> cho c\u00f4ng tr\u00ecnh m\u1edbi ho\u1eb7c khi b\u1ea3o v\u1ec7 c\u00e1c m\u1ea1ch c\u00f3 \u1ed5 c\u1eafm kh\u00f3 ti\u1ebfp c\u1eadn (nh\u01b0 s\u00e0n s\u01b0\u1edfi ho\u1eb7c m\u00e1y b\u01a1m ngo\u00e0i tr\u1eddi).<\/li>\n<\/ul>\n<\/li>\n<li><strong>Ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a th\u1ebf gi\u1edbi (Ch\u00e2u \u00c2u, Ch\u00e2u \u00c1, Ch\u00e2u Phi, Nam M\u1ef9, AU\/NZ):<\/strong> B\u1ea1n ph\u1ea3i s\u1eed d\u1ee5ng <strong>RCD<\/strong>.\n<ul>\n<li>S\u1eed d\u1ee5ng <strong>RCCB<\/strong> (k\u1ebft h\u1ee3p v\u1edbi MCB) \u0111\u1ec3 b\u1ea3o v\u1ec7 nh\u00f3m chung trong b\u1ea3ng ph\u00e2n ph\u1ed1i.<\/li>\n<li>S\u1eed d\u1ee5ng <strong>RCBO<\/strong> cho c\u00e1c m\u1ea1ch quan tr\u1ecdng, n\u01a1i b\u1ea1n kh\u00f4ng mu\u1ed1n l\u1ed7i tr\u00ean m\u1ed9t m\u1ea1ch l\u00e0m t\u00e1c \u0111\u1ed9ng to\u00e0n b\u1ed9 nh\u00f3m. Xem <a href=\"https:\/\/test.viox.com\/vi\/how-to-select-the-right-rcbo\/\">C\u00e1ch ch\u1ecdn RCBO ph\u00f9 h\u1ee3p<\/a>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p><strong>Tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t: Nhu c\u1ea7u \u0111\u1ed9 nh\u1ea1y cao<\/strong><br \/>\nN\u1ebfu b\u1ea1n \u1edf khu v\u1ef1c IEC nh\u01b0ng c\u1ea7n b\u1ea3o v\u1ec7 cho h\u1ed3 b\u01a1i ho\u1eb7c thi\u1ebft b\u1ecb y t\u1ebf, b\u1ea1n c\u00f3 th\u1ec3 ch\u1ec9 \u0111\u1ecbnh <strong>RCD 10mA<\/strong>. \u0110i\u1ec1u n\u00e0y m\u00f4 ph\u1ecfng \u0111\u1ed9 nh\u1ea1y c\u1ee7a GFCI B\u1eafc M\u1ef9 trong khi v\u1eabn duy tr\u00ec c\u00e1c y\u1ebfu t\u1ed1 h\u00ecnh th\u1ee9c IEC.<\/p>\n<h2>Nh\u1eefng quan ni\u1ec7m sai l\u1ea7m ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c l\u00e0m s\u00e1ng t\u1ecf<\/h2>\n<ul>\n<li><strong>L\u1ea7m t\u01b0\u1edfng 1: \u201cRCD ch\u1ec9 l\u00e0 GFCI c\u1ee7a Ch\u00e2u \u00c2u.\u201d<\/strong><em>Th\u1ef1c t\u1ebf:<\/em> M\u1eb7c d\u00f9 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng t\u1ef1 nhau, nh\u01b0ng <strong>30mA so v\u1edbi 5mA<\/strong> s\u1ef1 kh\u00e1c bi\u1ec7t t\u1ea1o ra c\u00e1c lo\u1ea1i ri\u00eang bi\u1ec7t v\u1ec1 m\u1eb7t ch\u1ee9c n\u0103ng. Ch\u00fang kh\u00f4ng th\u1ec3 thay th\u1ebf tr\u1ef1c ti\u1ebfp cho nhau.<\/li>\n<li><strong>Ng\u1ed9 nh\u1eadn #1: \u201cGFCI b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 t\u1ea3i.\u201d<\/strong><em>Th\u1ef1c t\u1ebf:<\/em> <strong>\u1ed4 c\u1eafm GFCI (\u0110\u1ea7u ra) KH\u00d4NG<\/strong> b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 t\u1ea3i. Ch\u1ec9 <strong>B\u1ed9 ng\u1eaft m\u1ea1ch GFCI<\/strong> MCB m\u1edbi l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u00f3. RCD (RCCB) c\u0169ng kh\u00f4ng b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 t\u1ea3i.<\/li>\n<li><strong>Ng\u1ed9 nh\u1eadn #2: \u201cB\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng RCD 30mA \u1edf M\u1ef9.\u201d<\/strong><em>Th\u1ef1c t\u1ebf:<\/em> N\u00f3i chung l\u00e0 kh\u00f4ng. NEC y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 GFCI lo\u1ea1i A (5mA) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n cho ng\u01b0\u1eddi. Thi\u1ebft b\u1ecb 30mA \u0111\u01b0\u1ee3c coi l\u00e0 \u201cB\u1ea3o v\u1ec7 ch\u1ea1m \u0111\u1ea5t thi\u1ebft b\u1ecb\u201d (GFPE) \u1edf M\u1ef9, kh\u00f4ng ph\u1ea3i l\u00e0 b\u1ea3o v\u1ec7 an to\u00e0n t\u00ednh m\u1ea1ng.<\/li>\n<li><strong>Ng\u1ed9 nh\u1eadn #3: \u201cRCCB cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ho\u00e0n to\u00e0n.\u201d<\/strong><em>Th\u1ef1c t\u1ebf:<\/em> RCCB ch\u1ec9 ph\u00e1t hi\u1ec7n r\u00f2 r\u1ec9. N\u1ebfu b\u1ea1n b\u1ecb \u0111o\u1ea3n m\u1ea1ch (N\u00f3ng sang Trung t\u00ednh), RCCB c\u00f3 th\u1ec3 s\u1ebd b\u1ecb n\u00f3ng ch\u1ea3y tr\u01b0\u1edbc khi n\u00f3 ng\u1eaft. N\u00f3 <strong>ph\u1ea3i<\/strong> c\u1ea7n \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i v\u1edbi MCB.<\/li>\n<\/ul>\n<h2>M\u1ee5c H\u1ecfi \u0110\u00e1p Th\u01b0\u1eddng G\u1eb7p<\/h2>\n<p><strong>H\u1ecfi: T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng RCD thay cho GFCI trong m\u1ed9t h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t \u1edf Hoa K\u1ef3 kh\u00f4ng?<\/strong><br \/>\nKh\u00f4ng. B\u1ed9 lu\u1eadt \u0110i\u1ec7n Qu\u1ed1c gia (NEC) y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 ch\u1ed1ng ch\u1ea1m \u0111\u1ea5t Lo\u1ea1i A, v\u1edbi d\u00f2ng c\u1eaft l\u00e0 5mA. M\u1ed9t RCD ti\u00eau chu\u1ea9n 30mA kh\u00f4ng \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 nh\u1ea1y n\u00e0y v\u00e0 s\u1ebd vi ph\u1ea1m quy \u0111\u1ecbnh v\u1ec1 b\u1ea3o v\u1ec7 con ng\u01b0\u1eddi.<\/p>\n<p><strong>H\u1ecfi: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa RCCB v\u00e0 RCBO l\u00e0 g\u00ec?<\/strong><br \/>\nM\u1ed9t <strong>RCCB<\/strong> ch\u1ec9 cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ch\u1ed1ng r\u00f2 r\u1ec9 \u0111\u1ea5t v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi m\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch ri\u00eang bi\u1ec7t (MCB). M\u1ed9t <strong>RCBO<\/strong> RCBO k\u1ebft h\u1ee3p c\u1ea3 hai ch\u1ee9c n\u0103ng (R\u00f2 r\u1ec9 + Qu\u00e1 t\u1ea3i + \u0110o\u1ea3n m\u1ea1ch) v\u00e0o m\u1ed9t thi\u1ebft b\u1ecb duy nh\u1ea5t. Xem <a href=\"https:\/\/test.viox.com\/vi\/what-is-the-difference-between-mcb-mccb-rcb-rcd-rccb-and-rcbo\/\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MCB, MCCB, RCB, RCD, RCCB v\u00e0 RCBO l\u00e0 g\u00ec<\/a>.<\/p>\n<p><strong>H\u1ecfi: T\u1ea1i sao B\u1eafc M\u1ef9 s\u1eed d\u1ee5ng 5mA trong khi ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a th\u1ebf gi\u1edbi s\u1eed d\u1ee5ng 30mA?<\/strong><br \/>\nB\u1eafc M\u1ef9 \u01b0u ti\u00ean ng\u01b0\u1ee1ng \u201cbu\u00f4ng tay\u201d (5mA) \u0111\u1ec3 ng\u0103n ch\u1eb7n m\u1ecdi c\u1ea3m gi\u00e1c b\u1ecb \u0111i\u1ec7n gi\u1eadt\/kh\u00f3a c\u01a1. Ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a th\u1ebf gi\u1edbi \u01b0u ti\u00ean s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 b\u1ea3o v\u1ec7 to\u00e0n m\u1ea1ch, x\u00e1c \u0111\u1ecbnh r\u1eb1ng 30mA l\u00e0 \u0111\u1ee7 an to\u00e0n \u0111\u1ec3 ng\u0103n ng\u1eeba rung t\u00e2m th\u1ea5t (t\u1eed vong) \u0111\u1ed3ng th\u1eddi gi\u1ea3m thi\u1ec3u t\u00ecnh tr\u1ea1ng ng\u1eaft do nhi\u1ec5u.<\/p>\n<p><strong>H\u1ecfi: B\u1ed9 ng\u1eaft m\u1ea1ch GFCI c\u00f3 cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng kh\u00f4ng?<\/strong><br \/>\nC\u00f3. M\u1ed9t <strong>B\u1ed9 ng\u1eaft m\u1ea1ch GFCI<\/strong> RCBO \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t trong t\u1ee7 \u0111i\u1ec7n cung c\u1ea5p ba l\u1edbp b\u1ea3o v\u1ec7: Ch\u1ea1m \u0111\u1ea5t, Qu\u00e1 t\u1ea3i v\u00e0 \u0110o\u1ea3n m\u1ea1ch. Tuy nhi\u00ean, m\u1ed9t <strong>\u1ed4 c\u1eafm GFCI<\/strong> \u1ed5 c\u1eafm GFCI (\u1ed5 c\u1eafm tr\u00ean t\u01b0\u1eddng) ch\u1ec9 cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ch\u1ea1m \u0111\u1ea5t.<\/p>\n<p><strong>H\u1ecfi: Lo\u1ea1i n\u00e0o t\u1ed1t h\u01a1n: GFCI 5mA hay RCD 30mA?<\/strong><br \/>\nKh\u00f4ng lo\u1ea1i n\u00e0o \u201ct\u1ed1t h\u01a1n\u201d; ch\u00fang ph\u1ee5c v\u1ee5 c\u00e1c tri\u1ebft l\u00fd kh\u00e1c nhau. 5mA cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt ch\u1eb7t ch\u1ebd h\u01a1n nh\u01b0ng d\u1ec5 b\u1ecb ng\u1eaft do nhi\u1ec5u tr\u00ean c\u00e1c m\u1ea1ch d\u00e0i. 30mA m\u1ea1nh m\u1ebd h\u01a1n \u0111\u1ec3 b\u1ea3o v\u1ec7 to\u00e0n b\u1ed9 ng\u00f4i nh\u00e0 nh\u01b0ng cho ph\u00e9p m\u1ed9t c\u00fa s\u1ed1c m\u1ea1nh h\u01a1n (m\u1eb7c d\u00f9 kh\u00f4ng g\u00e2y ch\u1ebft ng\u01b0\u1eddi) tr\u01b0\u1edbc khi ng\u1eaft.<\/p>\n<h2>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh<\/h2>\n<ul>\n<li><strong>C\u00f9ng C\u00f4ng Ngh\u1ec7, Quy T\u1eafc Kh\u00e1c Nhau:<\/strong> RCD v\u00e0 GFCI \u0111\u1ec1u s\u1eed d\u1ee5ng m\u00e1y bi\u1ebfn d\u00f2ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n r\u00f2 r\u1ec9, nh\u01b0ng ng\u01b0\u1ee1ng ng\u1eaft c\u1ee7a ch\u00fang kh\u00e1c nhau \u0111\u00e1ng k\u1ec3 (30mA so v\u1edbi 5mA).<\/li>\n<li><strong>Hi\u1ec3u R\u00f5 Khu V\u1ef1c C\u1ee7a B\u1ea1n:<\/strong> S\u1eed d\u1ee5ng GFCI (UL 943) cho c\u00e1c d\u1ef1 \u00e1n \u1edf B\u1eafc M\u1ef9; s\u1eed d\u1ee5ng RCD (IEC 61008\/61009) cho c\u00e1c d\u1ef1 \u00e1n Qu\u1ed1c t\u1ebf.<\/li>\n<li><strong>C\u00e1c Lo\u1ea1i Thi\u1ebft B\u1ecb Quan Tr\u1ecdng:<\/strong>\n<ul>\n<li><strong>RCCB:<\/strong> Ch\u1ec9 r\u00f2 r\u1ec9 (c\u1ea7n MCB).<\/li>\n<li><strong>RCBO \/ B\u1ed9 Ng\u1eaft M\u1ea1ch GFCI:<\/strong> R\u00f2 r\u1ec9 + Qu\u00e1 t\u1ea3i + \u0110o\u1ea3n m\u1ea1ch (T\u1ea5t c\u1ea3 trong m\u1ed9t).<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u0110\u00e1nh \u0110\u1ed5i \u0110\u1ed9 Nh\u1ea1y:<\/strong> 5mA (GFCI) an to\u00e0n h\u01a1n khi ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp nh\u01b0ng kh\u00f3 tri\u1ec3n khai h\u01a1n tr\u00ean c\u00e1c m\u1ea1ch d\u00e0i. 30mA (RCD) cho ph\u00e9p b\u1ea3o v\u1ec7 t\u1ee7 \u0111i\u1ec7n t\u1eadp trung.<\/li>\n<li><strong>Ph\u00e2n L\u1edbp An To\u00e0n:<\/strong> \u0110\u1ec3 \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 ho\u00e0n to\u00e0n, h\u00e3y k\u1ebft h\u1ee3p c\u00e1c thi\u1ebft b\u1ecb n\u00e0y v\u1edbi h\u1ec7 th\u1ed1ng ti\u1ebfp \u0111\u1ea5t v\u00e0 b\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t lan truy\u1ec1n th\u00edch h\u1ee3p. \u0110\u1ecdc <a href=\"https:\/\/test.viox.com\/vi\/grounding-vs-gfci-vs-surge-protection\/\">Ti\u1ebfp \u0110\u1ea5t so v\u1edbi GFCI so v\u1edbi B\u1ea3o V\u1ec7 Ch\u1ed1ng S\u00e9t Lan Truy\u1ec1n<\/a> \u0111\u1ec3 c\u00f3 b\u1ee9c tranh \u0111\u1ea7y \u0111\u1ee7.<\/li>\n<\/ul>\n<p>\u0110\u1ec3 c\u00f3 kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 m\u1ea1ch cao c\u1ea5p \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n to\u00e0n c\u1ea7u, h\u00e3y kh\u00e1m ph\u00e1 \u0111\u1ea7y \u0111\u1ee7 c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m <a href=\"https:\/\/test.viox.com\/vi\/\">RCCB, RCBO v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p GFCI c\u1ee7a VIOX<\/a>.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>For international electrical contractors, panel builders, and procurement specialists, navigating the terminology between IEC (International) and NEC (North American) standards can be a source of constant frustration. The most common point of confusion? The distinction between an RCD Breaker and a GFCI Breaker. Are they the same device? Can you use one in place of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21356,"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-21355","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\/21355","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=21355"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/21355\/revisions"}],"predecessor-version":[{"id":21357,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/21355\/revisions\/21357"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/21356"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=21355"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=21355"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=21355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}