{"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\/cs\/rcd-vs-gfci-breaker-difference-iec-nec\/","title":{"rendered":"Jisti\u010d RCD vs. jisti\u010d GFCI?"},"content":{"rendered":"<div class=\"product-intro\">\n<p>Pro mezin\u00e1rodn\u00ed dodavatele elektrotechnick\u00fdch za\u0159\u00edzen\u00ed, v\u00fdrobce rozvad\u011b\u010d\u016f a specialisty na n\u00e1kup m\u016f\u017ee b\u00fdt orientace v terminologii mezi normami IEC (mezin\u00e1rodn\u00ed) a NEC (severoamerick\u00e9) zdrojem neust\u00e1l\u00e9 frustrace. Nej\u010dast\u011bj\u0161\u00ed bod zmaten\u00ed? Rozd\u00edl mezi <strong>RCD jisti\u010dem<\/strong> a <strong>Jisti\u010d GFCI<\/strong>.<\/p>\n<p>Jsou to stejn\u00e1 za\u0159\u00edzen\u00ed? M\u016f\u017eete jedno pou\u017e\u00edt m\u00edsto druh\u00e9ho? Pro\u010d jeden vyp\u00edn\u00e1 p\u0159i 5 mA a druh\u00fd p\u0159i 30 mA?<\/p>\n<p>Tato p\u0159\u00edru\u010dka odstra\u0148uje terminologickou bari\u00e9ru a vysv\u011btluje technick\u00e9, funk\u010dn\u00ed a regula\u010dn\u00ed rozd\u00edly mezi t\u011bmito dv\u011bma kritick\u00fdmi bezpe\u010dnostn\u00edmi za\u0159\u00edzen\u00edmi. A\u0165 u\u017e specifikujete projekt v Dubaji (IEC) nebo Dallasu (NEC), pochopen\u00ed t\u011bchto nuanc\u00ed je z\u00e1sadn\u00ed pro zaji\u0161t\u011bn\u00ed bezpe\u010dnosti a spolehlivosti syst\u00e9mu.<\/p>\n<h2>Z\u00e1kladn\u00ed pravda: Stejn\u00e1 technologie, r\u016fzn\u00e9 n\u00e1zvy<\/h2>\n<p>V podstat\u011b jsou RCD i GFCI navr\u017eeny tak, aby zachra\u0148ovaly \u017eivoty detekc\u00ed <strong>zemn\u00edch svodov\u00fdch proud\u016f<\/strong>\u2013 elekt\u0159iny unikaj\u00edc\u00ed z obvodu do zem\u011b, \u010dasto p\u0159es lidsk\u00e9 t\u011blo.<\/p>\n<p>Ob\u011b za\u0159\u00edzen\u00ed funguj\u00ed na stejn\u00e9m z\u00e1kladn\u00edm fyzik\u00e1ln\u00edm principu: <strong>Kirchhoff\u016fv z\u00e1kon o proudech<\/strong>. Monitoruj\u00ed proud tekouc\u00ed ven \u017eiv\u00fdm (hork\u00fdm) vodi\u010dem a porovn\u00e1vaj\u00ed ho s proudem vracej\u00edc\u00edm se neutr\u00e1ln\u00edm vodi\u010dem. Ve zdrav\u00e9m obvodu jsou tyto proudy stejn\u00e9. Pokud se li\u0161\u00ed, proud unik\u00e1 n\u011bkam, kam by nem\u011bl.<\/p>\n<ul>\n<li><strong>RCD (Residual Current Device):<\/strong> Toto je zast\u0159e\u0161uj\u00edc\u00ed term\u00edn pou\u017e\u00edvan\u00fd <strong>IEC (Mezin\u00e1rodn\u00ed elektrotechnick\u00e1 komise)<\/strong>. IEC. Zahrnuje rodinu za\u0159\u00edzen\u00ed v\u010detn\u011b RCCB a RCBO. Term\u00edn \u201crezidu\u00e1ln\u00ed\u201d se vztahuje k \u201czbytkov\u00e9mu\u201d proudu, kter\u00fd se nevr\u00e1til p\u0159es neutr\u00e1l.<\/li>\n<li><strong>GFCI (Proudov\u00fd chr\u00e1ni\u010d):<\/strong> Toto je specifick\u00fd term\u00edn pou\u017e\u00edvan\u00fd v <strong>Severn\u00ed Americe (normy NEC\/UL)<\/strong>. Zd\u016fraz\u0148uje <em>chyba<\/em> stav (zemn\u00ed porucha) sp\u00ed\u0161e ne\u017e metodu m\u011b\u0159en\u00ed.<\/li>\n<\/ul>\n<p>Zat\u00edmco fyzika je identick\u00e1, <strong>implementace, citlivost a vyp\u00ednac\u00ed charakteristiky<\/strong> se v\u00fdznamn\u011b li\u0161\u00ed v d\u016fsledku odli\u0161n\u00fdch bezpe\u010dnostn\u00edch filozofi\u00ed mezi Severn\u00ed Amerikou a zbytkem sv\u011bta.<\/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;\">Technick\u00e9 sch\u00e9ma zn\u00e1zor\u0148uj\u00edc\u00ed identick\u00e9 vnit\u0159n\u00ed principy fungov\u00e1n\u00ed detek\u010dn\u00edch mechanism\u016f RCD (IEC) a GFCI (UL 943).<\/figcaption><\/figure>\n<h2>Rozd\u011blen\u00ed terminologie: Rodina RCD vs. rodina GFCI<\/h2>\n<p>Zmatek \u010dasto pramen\u00ed ze skute\u010dnosti, \u017ee \u201cRCD\u201d je kategorie, zat\u00edmco \u201cGFCI\u201d se \u010dasto vztahuje ke konkr\u00e9tn\u00edmu form\u00e1tu produktu. Pro objasn\u011bn\u00ed se mus\u00edme pod\u00edvat na to, jak jsou tyto funkce baleny.<\/p>\n<p>Pro hlub\u0161\u00ed ponor do t\u011bchto zkratek se pod\u00edvejte do na\u0161\u00ed p\u0159\u00edru\u010dky o <a href=\"https:\/\/test.viox.com\/cs\/electrical-alphabet-soup-mccb-vs-rccb-explained\/\">Elektrick\u00e1 pol\u00e9vka z p\u00edsmen: Vysv\u011btlen\u00ed MCCB vs. RCCB<\/a>.<\/p>\n<h3>Srovn\u00e1n\u00ed glob\u00e1ln\u00ed terminologie<\/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>IEC \/ Mezin\u00e1rodn\u00ed term\u00edn<\/th>\n<th>Severoamerick\u00fd term\u00edn (UL\/NEC)<\/th>\n<th>Funkce<\/th>\n<th>Prim\u00e1rn\u00ed norma<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>proudov\u00fd chr\u00e1ni\u010d (RCD)<\/strong> (Zast\u0159e\u0161uj\u00edc\u00ed term\u00edn)<\/td>\n<td><strong>Ochrana proti zemn\u00edmu spojen\u00ed<\/strong><\/td>\n<td>Obecn\u00fd term\u00edn pro ochranu proti svodov\u00e9mu proudu.<\/td>\n<td>IEC 61008 \/ UL 943<\/td>\n<\/tr>\n<tr>\n<td><strong>RCCB<\/strong> (Proudov\u00fd chr\u00e1ni\u010d)<\/td>\n<td><em>\u017d\u00e1dn\u00fd p\u0159\u00edm\u00fd ekvivalent<\/em> (nejbli\u017e\u0161\u00ed je samostatn\u00fd GFCI sp\u00edna\u010d, vz\u00e1cn\u00fd)<\/td>\n<td>Poskytuje ochranu proti svodov\u00e9mu proudu <strong>POUZE<\/strong>. Mus\u00ed b\u00fdt sp\u00e1rov\u00e1n s <a href=\"https:\/\/test.viox.com\/cs\/mcb\/\">MCB<\/a>.<\/td>\n<td>IEC 61008-1<\/td>\n<\/tr>\n<tr>\n<td><strong>RCBO<\/strong> (Proudov\u00fd chr\u00e1ni\u010d s nadproudem)<\/td>\n<td><strong>Jisti\u010d GFCI<\/strong><\/td>\n<td>Kombinuje ochranu proti svodov\u00e9mu proudu + ochranu proti p\u0159et\u00ed\u017een\u00ed + ochranu proti zkratu.<\/td>\n<td>IEC 61009-1 \/ UL 943<\/td>\n<\/tr>\n<tr>\n<td><em>\u017d\u00e1dn\u00fd p\u0159\u00edm\u00fd ekvivalent<\/em> (SRCD existuj\u00ed, ale jsou vz\u00e1cn\u00e9)<\/td>\n<td><strong>GFCI z\u00e1suvka<\/strong> (Z\u00e1suvka)<\/td>\n<td>Ochrana proti svodov\u00e9mu proudu integrovan\u00e1 do z\u00e1suvky ve zdi.<\/td>\n<td>UL 943<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>P\u0159\u00edstup IEC (RCD)<\/h3>\n<p>Na trz\u00edch IEC (Evropa, Asie, Austr\u00e1lie) je ochrana obvykle rozd\u011blena. M\u016f\u017eete m\u00edt <strong>RCCB<\/strong> chr\u00e1n\u00edc\u00ed skupinu obvod\u016f, nebo <strong>RCBO<\/strong> chr\u00e1n\u00edc\u00ed jeden kritick\u00fd obvod. Z\u00e1sadn\u00ed je, \u017ee RCCB <em>nem\u016f\u017ee<\/em> nechr\u00e1n\u00ed proti p\u0159et\u00ed\u017een\u00ed; sho\u0159\u00ed, pokud proud p\u0159ekro\u010d\u00ed jeho jmenovitou hodnotu. Mus\u00ed b\u00fdt v\u017edy sp\u00e1rov\u00e1n s p\u0159ed\u0159azenou pojistkou nebo MCB. Viz <a href=\"https:\/\/test.viox.com\/cs\/rcd-vs-mcb-understanding-the-key-differences-in-electrical-protection-devices\/\">RCD vs. MCB<\/a> pro v\u00edce podrobnost\u00ed.<\/p>\n<h3>Severoamerick\u00fd p\u0159\u00edstup (GFCI)<\/h3>\n<p>V USA a Kanad\u011b je <strong>Jisti\u010d GFCI<\/strong> p\u0159\u00edm\u00fd ekvivalent RCBO \u2013 zvl\u00e1dne v\u0161e (p\u0159et\u00ed\u017een\u00ed, zkrat, zemn\u00ed porucha) v jednom balen\u00ed instalovan\u00e9m v panelu. Nejb\u011b\u017en\u011bj\u0161\u00edm za\u0159\u00edzen\u00edm je v\u0161ak <strong>GFCI z\u00e1suvka<\/strong>, kter\u00fd umis\u0165uje ochranu p\u0159\u00edmo do m\u00edsta pou\u017eit\u00ed (nap\u0159. z\u00e1suvka v koupeln\u011b).<\/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;\">Vizu\u00e1ln\u00ed srovn\u00e1n\u00ed: VIOX RCCB (form\u00e1t IEC) vs. GFCI jisti\u010d (severoamerick\u00fd form\u00e1t).<\/figcaption><\/figure>\n<h2>Z\u00e1sadn\u00ed rozd\u00edl: Prahov\u00e9 hodnoty citlivosti<\/h2>\n<p>Nejv\u00fdznamn\u011bj\u0161\u00ed technick\u00fd rozd\u00edl mezi RCD a GFCI je <strong>citlivost<\/strong>. To ur\u010duje, kde a jak je lze pou\u017e\u00edt.<\/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>Parametr<\/th>\n<th>RCD (norma IEC)<\/th>\n<th>GFCI (severoamerick\u00e1 norma)<\/th>\n<th>Pozn\u00e1mky<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Prahov\u00e1 hodnota vypnut\u00ed<\/strong><\/td>\n<td><strong>30mA<\/strong> (Typick\u00e9)<\/td>\n<td><strong>30mA<\/strong> 5mA<\/td>\n<td>(\u00b11mA).<\/td>\n<\/tr>\n<tr>\n<td><strong>GFCI je 6x citliv\u011bj\u0161\u00ed.<\/strong><\/td>\n<td>Zabr\u00e1n\u011bn\u00ed smrteln\u00e9 fibrilaci (ochrana p\u0159ed \u00farazem elektrick\u00fdm proudem).<\/td>\n<td>Zabr\u00e1n\u011bn\u00ed <em>jak\u00fdkoli<\/em> pocitu \u0161oku (reakce z \u00faleku).<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><strong>Nep\u0159\u00edjemn\u00e9 zakopnut\u00ed<\/strong><\/td>\n<td>N\u00edzk\u00e9 riziko. 30 mA umo\u017e\u0148uje p\u0159irozen\u00fd svod kabelu.<\/td>\n<td>Vysok\u00e9 riziko u dlouh\u00fdch kabelov\u00fdch tras kv\u016fli kapacitn\u00edmu svodu.<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><strong>Doba vypnut\u00ed<\/strong><\/td>\n<td>&lt; 300 ms (okam\u017eit\u00e1 reakce)<\/td>\n<td>&lt; 25 ms (p\u0159i vy\u0161\u0161\u00edch poruch\u00e1ch)<\/td>\n<td>GFCI obecn\u011b vyp\u00edn\u00e1 rychleji.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Pro\u010d ten rozd\u00edl?<\/strong><br \/>\nSeveroamerick\u00e9 normy (UL 943) up\u0159ednost\u0148uj\u00ed pr\u00e1h \u201cuvoln\u011bn\u00ed\u201d. \u0160ok 5 mA je bolestiv\u00fd, ale umo\u017e\u0148uje osob\u011b uvolnit se od dr\u00e1tu. Normy IEC (IEC 60479) uzn\u00e1vaj\u00ed, \u017ee i kdy\u017e je 30 mA v\u00fdznamn\u00fd \u0161ok, je obecn\u011b pod prahem pro ventrikul\u00e1rn\u00ed fibrilaci (z\u00e1stava srdce) po kr\u00e1tkou dobu.<\/p>\n<p>IEC zvolila 30 mA, aby umo\u017enila ochranu \u201ccel\u00e9ho domu\u201d nebo \u201ccel\u00e9ho obvodu\u201d bez neust\u00e1l\u00e9ho ru\u0161iv\u00e9ho vyp\u00edn\u00e1n\u00ed zp\u016fsoben\u00e9ho p\u0159irozen\u00fdm svodov\u00fdm proudem nap\u00e1jec\u00edch zdroj\u016f po\u010d\u00edta\u010d\u016f a dlouh\u00fdch kabelov\u00fdch tras. NEC zvolila 5 mA pro maxim\u00e1ln\u00ed bezpe\u010dnost, ale to \u010dasto nut\u00ed instalovat ochranu u z\u00e1suvky (GFCI z\u00e1suvka) sp\u00ed\u0161e ne\u017e v rozvad\u011b\u010di, aby se minimalizovala d\u00e9lka kabelu a akumulace svodu.<\/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;\">\u017deb\u0159\u00ed\u010dek citlivosti: Porovn\u00e1n\u00ed z\u00f3n dopadu na lidskou bezpe\u010dnost mezi normami UL 943 GFCI (5 mA) a IEC RCD (30 mA).<\/figcaption><\/figure>\n<h2>Filozofie implementace: Bod pou\u017eit\u00ed vs. ochrana cel\u00e9ho obvodu<\/h2>\n<p>Rozd\u00edl v citlivosti vede ke dv\u011bma odli\u0161n\u00fdm filozofi\u00edm instalace.<\/p>\n<h3>Severoamerick\u00fd p\u0159\u00edstup (NEC): Bod pou\u017eit\u00ed<\/h3>\n<p>Proto\u017ee je 5 mA tak citliv\u00e9, GFCIs se historicky instaluj\u00ed <strong>co nejbl\u00ed\u017ee z\u00e1t\u011b\u017ei<\/strong>\u2014typicky jako z\u00e1suvka v koupeln\u011b nebo kuchyni. To zabra\u0148uje vypnut\u00ed za\u0159\u00edzen\u00ed v d\u016fsledku kumulativn\u00edho svodu 50 stop kabelu Romex. I kdy\u017e existuj\u00ed GFCI jisti\u010de, jsou v star\u0161\u00edch domech m\u00e9n\u011b b\u011b\u017en\u00e9 ne\u017e GFCI z\u00e1suvky.<\/p>\n<h3>P\u0159\u00edstup IEC: Ochrana cel\u00e9ho obvodu<\/h3>\n<p>S prahem 30 mA m\u016f\u017ee RCD pohodln\u011b chr\u00e1nit cel\u00fd obvod nebo dokonce skupinu obvod\u016f z rozvodn\u00e9 desky (spot\u0159ebitelsk\u00e9 jednotky). To centralizuje ochranu, co\u017e usnad\u0148uje resetov\u00e1n\u00ed a spr\u00e1vu.<\/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>Funkce<\/th>\n<th>Severoamerick\u00fd p\u0159\u00edstup (GFCI)<\/th>\n<th>P\u0159\u00edstup IEC (RCD)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Um\u00edst\u011bn\u00ed<\/strong><\/td>\n<td>Z\u00e1suvky ve zdi (z\u00e1suvky) nebo panel<\/td>\n<td>Rozvodn\u00e1 deska (panel)<\/td>\n<\/tr>\n<tr>\n<td><strong>Rozsah<\/strong><\/td>\n<td>Specifick\u00e1 nebezpe\u010dn\u00e1 m\u00edsta (mokr\u00e9 prostory)<\/td>\n<td>V\u0161echny z\u00e1suvkov\u00e9 obvody (a st\u00e1le v\u00edce i osv\u011btlen\u00ed)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u00dadr\u017eba<\/strong><\/td>\n<td>U\u017eivatel mus\u00ed ka\u017ed\u00fd m\u011bs\u00edc testovat ka\u017edou z\u00e1suvku<\/td>\n<td>U\u017eivatel testuje za\u0159\u00edzen\u00ed na hlavn\u00edm panelu<\/td>\n<\/tr>\n<tr>\n<td><strong>N\u00e1klady<\/strong><\/td>\n<td>Ni\u017e\u0161\u00ed (z\u00e1suvky jsou levn\u00e9)<\/td>\n<td>Vy\u0161\u0161\u00ed (panelov\u00e1 za\u0159\u00edzen\u00ed jsou konstruovan\u00e9 komponenty)<\/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;\">Diagram ilustruj\u00edc\u00ed rozd\u00edl mezi severoamerickou instalac\u00ed GFCI v m\u00edst\u011b pou\u017eit\u00ed a ochranou RCD na \u00farovni obvodu IEC.<\/figcaption><\/figure>\n<h2>Matice norem a shody<\/h2>\n<p>Pro v\u00fdrobce a dovozce je znalost normy d\u016fle\u017eit\u011bj\u0161\u00ed ne\u017e znalost n\u00e1zvu. Nem\u016f\u017eete prod\u00e1vat IEC RCD na americk\u00e9m trhu jako \u201cGFCI\u201d, pokud neprojde UL 943, co\u017e v\u011bt\u0161ina 30mA RCD sel\u017ee kv\u016fli po\u017eadavk\u016fm na citlivost.<\/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>Typ za\u0159\u00edzen\u00ed<\/th>\n<th>Prim\u00e1rn\u00ed norma<\/th>\n<th>Citlivost<\/th>\n<th>Po\u017eadavek na testov\u00e1n\u00ed<\/th>\n<th>Certifikace<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>GFCI<\/strong><\/td>\n<td><strong>UL 943<\/strong> \/ CSA C22.2<\/td>\n<td><strong>30mA<\/strong> \u00b11mA<\/td>\n<td>M\u011bs\u00ed\u010dn\u011b (automatick\u00e9 monitorov\u00e1n\u00ed vy\u017eadov\u00e1no v nov\u00fdch verz\u00edch)<\/td>\n<td>UL \/ ETL \/ CSA<\/td>\n<\/tr>\n<tr>\n<td><strong>RCCB<\/strong><\/td>\n<td><strong>IEC 61008-1<\/strong><\/td>\n<td>10, 30, 100, 300mA<\/td>\n<td>Periodicky (testovac\u00ed tla\u010d\u00edtko)<\/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>Periodicky (testovac\u00ed tla\u010d\u00edtko)<\/td>\n<td>CE \/ CB \/ CCC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Pozn\u00e1mka ke k\u0159\u00ed\u017eov\u00e9 shod\u011b:<\/strong> 30mA RCD <strong>ne<\/strong> spl\u0148uje po\u017eadavky NEC na ochranu osob v koupeln\u00e1ch\/kuchyn\u00edch (kter\u00e9 vy\u017eaduj\u00ed 5mA). Naopak, 5mA GFCI instalovan\u00e9 v evropsk\u00e9m dom\u011b by mohlo zp\u016fsobit nekone\u010dn\u00e9 ru\u0161iv\u00e9 vyp\u00edn\u00e1n\u00ed kv\u016fli odli\u0161n\u00fdm uspo\u0159\u00e1d\u00e1n\u00edm uzemn\u011bn\u00ed a povolen\u00fdm svodov\u00fdm proud\u016fm.<\/p>\n<p>Pro v\u00edce informac\u00ed o norm\u00e1ch IEC viz <a href=\"https:\/\/test.viox.com\/cs\/iec-61008-1-standard-rccb-requirements-explained\/\">Norma IEC 61008-1: Vysv\u011btleny po\u017eadavky na 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;\">Dodavatel instaluje ochrann\u00e1 za\u0159\u00edzen\u00ed VIOX: Zobrazen\u00ed form\u00e1t\u016f IEC i severoamerick\u00fdch vedle sebe v komer\u010dn\u00edm panelu.<\/figcaption><\/figure>\n<h2>Kdy zvolit RCD vs GFCI<\/h2>\n<p>Volba je t\u00e9m\u011b\u0159 v\u017edy diktov\u00e1na <strong>geografi\u00ed a m\u00edstn\u00edmi p\u0159edpisy<\/strong>.<\/p>\n<ol>\n<li><strong>Severn\u00ed Amerika (USA, Kanada, Mexiko):<\/strong> Mus\u00edte pou\u017e\u00edt <strong>GFCI<\/strong>.\n<ul>\n<li>Pou\u017eijte <strong>GFCI z\u00e1suvky<\/strong> pro dodate\u010dn\u00e9 \u00fapravy nebo specifick\u00e1 mokr\u00e1 m\u00edsta.<\/li>\n<li>Pou\u017eijte <strong>Jisti\u010de GFCI<\/strong> pro novou v\u00fdstavbu nebo p\u0159i ochran\u011b obvod\u016f s t\u011b\u017eko dostupn\u00fdmi z\u00e1suvkami (jako jsou vyh\u0159\u00edvan\u00e9 podlahy nebo venkovn\u00ed \u010derpadla).<\/li>\n<\/ul>\n<\/li>\n<li><strong>Zbytek sv\u011bta (Evropa, Asie, Afrika, Ji\u017en\u00ed Amerika, AU\/NZ):<\/strong> Mus\u00edte pou\u017e\u00edt <strong>RCD<\/strong>.\n<ul>\n<li>Pou\u017eijte <strong>RCCB<\/strong> (sp\u00e1rovan\u00e9 s MCB) pro obecnou skupinovou ochranu v rozvodn\u00fdch desk\u00e1ch.<\/li>\n<li>Pou\u017eijte <strong>proudov\u00fdch chr\u00e1ni\u010d\u016f (RCBO)<\/strong> pro kritick\u00e9 obvody, kde nechcete, aby porucha na jednom obvodu vypnula celou skupinu. Viz <a href=\"https:\/\/test.viox.com\/cs\/how-to-select-the-right-rcbo\/\">Jak vybrat spr\u00e1vn\u00fd proudov\u00fd chr\u00e1ni\u010d (RCBO)<\/a>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p><strong>Zvl\u00e1\u0161tn\u00ed p\u0159\u00edpad: Pot\u0159eby vysok\u00e9 citlivosti<\/strong><br \/>\nPokud jste v regionu IEC, ale pot\u0159ebujete ochranu pro baz\u00e9n nebo l\u00e9ka\u0159sk\u00e9 vybaven\u00ed, m\u016f\u017eete specifikovat <strong>10mA RCD<\/strong>. To napodobuje citlivost severoamerick\u00e9 GFCI p\u0159i zachov\u00e1n\u00ed form\u00e1t\u016f IEC.<\/p>\n<h2>Vyvr\u00e1cen\u00ed b\u011b\u017en\u00fdch myln\u00fdch p\u0159edstav<\/h2>\n<ul>\n<li><strong>M\u00fdtus \u010d. 1: \u201cRCD jsou jen evropsk\u00e9 GFCI.\u201d<\/strong><em>Fakt:<\/em> A\u010dkoli je technologie podobn\u00e1, <strong>30 mA vs 5 mA<\/strong> rozd\u00edl z nich \u010din\u00ed funk\u010dn\u011b odli\u0161n\u00e9 kategorie. Nejsou p\u0159\u00edmo zam\u011bniteln\u00e9.<\/li>\n<li><strong>M\u00fdtus #2: \u201cGFCI chr\u00e1n\u00ed proti p\u0159et\u00ed\u017een\u00ed.\u201d<\/strong><em>Fakt:<\/em> <strong>GFCI z\u00e1suvky (v\u00fdstupy) NECHR\u00c1N\u00cd<\/strong> proti p\u0159et\u00ed\u017een\u00ed. Pouze <strong>Jisti\u010de GFCI<\/strong> jisti\u010de. RCD (RCCB) tak\u00e9 nechr\u00e1n\u00ed proti p\u0159et\u00ed\u017een\u00ed.<\/li>\n<li><strong>M\u00fdtus #3: \u201cV USA m\u016f\u017eete pou\u017e\u00edt 30mA RCD.\u201d<\/strong><em>Fakt:<\/em> Obecn\u011b ne. NEC vy\u017eaduje ochranu GFCI t\u0159\u00eddy A (5 mA) pro bezpe\u010dnost osob. Za\u0159\u00edzen\u00ed s proudem 30 mA je v USA pova\u017eov\u00e1no za \u201cochranu proti zemn\u00edmu poruchov\u00e9mu proudu za\u0159\u00edzen\u00ed\u201d (GFPE), nikoli za ochranu \u017eivota.<\/li>\n<li><strong>M\u00fdtus #4: \u201cRCCB poskytuj\u00ed kompletn\u00ed ochranu.\u201d<\/strong><em>Fakt:<\/em> RCCB detekuje pouze svodov\u00fd proud. Pokud m\u00e1te zkrat (f\u00e1ze na nulov\u00fd vodi\u010d), RCCB se pravd\u011bpodobn\u011b roztav\u00ed d\u0159\u00edve, ne\u017e vypne. Mus\u00ed <strong>fungovalo,<\/strong> b\u00fdt sp\u00e1rov\u00e1n s MCB.<\/li>\n<\/ul>\n<h2>Sekce FAQ<\/h2>\n<p><strong>Ot\u00e1zka: Mohu pou\u017e\u00edt RCD m\u00edsto GFCI v instalaci v USA?<\/strong><br \/>\nNe. N\u00e1rodn\u00ed elektrotechnick\u00fd p\u0159edpis (NEC) vy\u017eaduje zemn\u00ed ochranu t\u0159\u00eddy A, kter\u00e1 vyp\u00edn\u00e1 p\u0159i 5 mA. Standardn\u00ed proudov\u00fd chr\u00e1ni\u010d 30 mA nespl\u0148uje tento po\u017eadavek na citlivost a byl by poru\u0161en\u00edm p\u0159edpisu pro ochranu osob.<\/p>\n<p><strong>Ot\u00e1zka: Jak\u00fd je rozd\u00edl mezi RCCB a RCBO?<\/strong><br \/>\n. <strong>RCCB<\/strong> poskytuje pouze ochranu proti zemn\u00edmu svodu a mus\u00ed b\u00fdt pou\u017eit se samostatn\u00fdm jisti\u010dem (MCB). RCBO <strong>RCBO<\/strong> kombinuje ob\u011b funkce (svodov\u00fd proud + p\u0159et\u00ed\u017een\u00ed + zkrat) do jednoho za\u0159\u00edzen\u00ed. Viz <a href=\"https:\/\/test.viox.com\/cs\/what-is-the-difference-between-mcb-mccb-rcb-rcd-rccb-and-rcbo\/\">Jak\u00fd je rozd\u00edl mezi MCB, MCCB, RCB, RCD, RCCB a RCBO<\/a>.<\/p>\n<p><strong>Ot\u00e1zka: Pro\u010d Severn\u00ed Amerika pou\u017e\u00edv\u00e1 5 mA, kdy\u017e zbytek sv\u011bta pou\u017e\u00edv\u00e1 30 mA?<\/strong><br \/>\nSevern\u00ed Amerika up\u0159ednostnila pr\u00e1h \u201cuvoln\u011bn\u00ed\u201d (5 mA), aby zabr\u00e1nila jak\u00e9mukoli pocitu \u0161oku\/zablokov\u00e1n\u00ed sval\u016f. Zbytek sv\u011bta up\u0159ednostnil stabilitu syst\u00e9mu a ochranu cel\u00e9ho obvodu a ur\u010dil, \u017ee 30 mA je dostate\u010dn\u011b bezpe\u010dn\u00e9, aby se zabr\u00e1nilo fibrilaci srdce (smrti), a z\u00e1rove\u0148 se sn\u00ed\u017eilo ru\u0161iv\u00e9 vyp\u00edn\u00e1n\u00ed.<\/p>\n<p><strong>Ot\u00e1zka: Poskytuj\u00ed jisti\u010de GFCI tak\u00e9 nadproudovou ochranu?<\/strong><br \/>\nAno. Jisti\u010d GFCI <strong>Jisti\u010d GFCI<\/strong> instalovan\u00fd v rozvad\u011b\u010di poskytuje t\u0159i vrstvy ochrany: zemn\u00ed porucha, p\u0159et\u00ed\u017een\u00ed a zkrat. Nicm\u00e9n\u011b, GFCI z\u00e1suvka <strong>GFCI z\u00e1suvka<\/strong> (n\u00e1st\u011bnn\u00e1 z\u00e1suvka) poskytuje pouze ochranu proti zemn\u00ed poru\u0161e.<\/p>\n<p><strong>Ot\u00e1zka: Co je lep\u0161\u00ed: 5mA GFCI nebo 30mA RCD?<\/strong><br \/>\nAni jedno nen\u00ed \u201clep\u0161\u00ed\u201d; slou\u017e\u00ed r\u016fzn\u00fdm filozofi\u00edm. 5 mA nab\u00edz\u00ed t\u011bsn\u011bj\u0161\u00ed ochranu proti \u00farazu elektrick\u00fdm proudem, ale je n\u00e1chyln\u00e9 k ru\u0161iv\u00e9mu vyp\u00edn\u00e1n\u00ed na dlouh\u00fdch obvodech. 30 mA je robustn\u011bj\u0161\u00ed pro ochranu cel\u00e9ho domu, ale umo\u017e\u0148uje siln\u011bj\u0161\u00ed (i kdy\u017e ne smrteln\u00fd) \u0161ok p\u0159ed vypnut\u00edm.<\/p>\n<h2>Kl\u00ed\u010dov\u00e9 poznatky<\/h2>\n<ul>\n<li><strong>Stejn\u00e1 technologie, r\u016fzn\u00e1 pravidla:<\/strong> RCD a GFCI pou\u017e\u00edvaj\u00ed proudov\u00e9 transform\u00e1tory k detekci svodov\u00e9ho proudu, ale jejich prahov\u00e9 hodnoty vypnut\u00ed se v\u00fdrazn\u011b li\u0161\u00ed (30 mA vs 5 mA).<\/li>\n<li><strong>Zn\u00e1te sv\u016fj region:<\/strong> Pou\u017e\u00edvejte GFCI (UL 943) pro severoamerick\u00e9 projekty; pou\u017e\u00edvejte RCD (IEC 61008\/61009) pro mezin\u00e1rodn\u00ed projekty.<\/li>\n<li><strong>Na typech za\u0159\u00edzen\u00ed z\u00e1le\u017e\u00ed:<\/strong>\n<ul>\n<li><strong>RCCB:<\/strong> Pouze svodov\u00fd proud (pot\u0159ebuje MCB).<\/li>\n<li><strong>RCBO \/ GFCI jisti\u010d:<\/strong> Svodov\u00fd proud + p\u0159et\u00ed\u017een\u00ed + zkrat (v\u0161e v jednom).<\/li>\n<\/ul>\n<\/li>\n<li><strong>Kompromis citlivosti:<\/strong> 5 mA (GFCI) je bezpe\u010dn\u011bj\u0161\u00ed pro p\u0159\u00edm\u00fd kontakt, ale obt\u00ed\u017en\u011bji se implementuje na dlouh\u00fdch obvodech. 30 mA (RCD) umo\u017e\u0148uje centralizovanou ochranu rozvad\u011b\u010de.<\/li>\n<li><strong>Vrstven\u00ed bezpe\u010dnosti:<\/strong> Pro kompletn\u00ed ochranu kombinujte tato za\u0159\u00edzen\u00ed se spr\u00e1vn\u00fdm uzemn\u011bn\u00edm a p\u0159ep\u011b\u0165ovou ochranou. P\u0159e\u010dt\u011bte si <a href=\"https:\/\/test.viox.com\/cs\/grounding-vs-gfci-vs-surge-protection\/\">Uzemn\u011bn\u00ed vs GFCI vs P\u0159ep\u011b\u0165ov\u00e1 ochrana<\/a> pro \u00fapln\u00fd obr\u00e1zek.<\/li>\n<\/ul>\n<p>Pro pr\u00e9miovou ochranu obvod\u016f, kter\u00e1 spl\u0148uje glob\u00e1ln\u00ed standardy, prozkoumejte kompletn\u00ed \u0159adu VIOX <a href=\"https:\/\/test.viox.com\/cs\/\">RCCB, RCBO a GFCI \u0159e\u0161en\u00ed<\/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\/cs\/wp-json\/wp\/v2\/posts\/21355","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/comments?post=21355"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/21355\/revisions"}],"predecessor-version":[{"id":21357,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/21355\/revisions\/21357"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media\/21356"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media?parent=21355"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/categories?post=21355"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/tags?post=21355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}