{"id":3394,"date":"2026-08-02T09:00:00","date_gmt":"2026-08-02T09:00:00","guid":{"rendered":"https:\/\/chac-electric.com\/blog\/rccb-30ma-vs-10ma-selection-guide\/"},"modified":"2026-08-07T02:24:13","modified_gmt":"2026-08-07T02:24:13","slug":"rccb-30ma-vs-10ma-selection-guide","status":"publish","type":"post","link":"https:\/\/chac-electric.com\/pt\/blog\/rccb-30ma-vs-10ma-selection-guide\/","title":{"rendered":"Disjuntores diferenciais de 30mA vs 10mA: Perguntas sobre a sele\u00e7\u00e3o de sensibilidade para quadros el\u00e9ctricos"},"content":{"rendered":"<div class=\"b2b-article\">\n<p>30ma residual current device selection starts with the circuit role, the project requirement, and selected-model documentation. 30mA vs 10mA RCCB: Sensitivity Selection Questions for Distribution Panels helps panel builders organize those checks before a device is specified or an RFQ is issued. Sensitivity choices stay with the project team and the residual-current device documentation selected for the circuit.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-3409 aligncenter\" src=\"https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/30mA-vs-10mA-RCCB-1024x680.webp\" alt=\"Disjuntores diferenciais de 30mA vs 10mA: Perguntas sobre a sele\u00e7\u00e3o de sensibilidade para quadros el\u00e9ctricos\" width=\"1024\" height=\"680\" srcset=\"https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/30mA-vs-10mA-RCCB-1024x680.webp 1024w, https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/30mA-vs-10mA-RCCB-300x199.webp 300w, https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/30mA-vs-10mA-RCCB-768x510.webp 768w, https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/30mA-vs-10mA-RCCB-1536x1020.webp 1536w, https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/30mA-vs-10mA-RCCB-18x12.webp 18w, https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/30mA-vs-10mA-RCCB-600x398.webp 600w, https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/30mA-vs-10mA-RCCB.webp 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<figure style=\"margin: 26px 0; text-align: center;\"><\/figure>\n<nav class=\"b2b-toc\">\n<h2 id=\"contents\">Conte\u00fados<\/h2>\n<ul>\n<li><a href=\"#part-1-what-does-30ma-versus-10ma-actually-change\">Part 1. What does 30mA versus 10mA actually change?<\/a><\/li>\n<li><a href=\"#part-2-which-panel-inputs-belong-in-the-sensitivity-decision\">Part 2. Which panel inputs belong in the sensitivity decision?<\/a><\/li>\n<li><a href=\"#part-3-why-can-normal-leakage-affect-availability\">Part 3. Why can normal leakage affect availability?<\/a><\/li>\n<li><a href=\"#part-4-how-should-the-panel-drawing-separate-protection-decisions\">Part 4. How should the panel drawing separate protection decisions?<\/a><\/li>\n<li><a href=\"#part-5-what-should-an-rfq-say-about-a-30ma-residual-current-device\">Part 5. What should an RFQ say about a 30mA residual current device?<\/a><\/li>\n<li><a href=\"#part-6-which-chac-page-is-the-appropriate-product-starting-point\">Part 6. Which CHAC page is the appropriate product starting point?<\/a><\/li>\n<li><a href=\"#part-7-where-does-this-10ma-30ma-comparison-stop-being-enough\">Part 7. Where does this 10mA\/30mA comparison stop being enough?<\/a><\/li>\n<\/ul>\n<\/nav>\n<h2 id=\"part-1-what-does-30ma-versus-10ma-actually-change\">Part 1. What does 30mA versus 10mA actually change?<\/h2>\n<p>The setting is the residual-current sensitivity to be reviewed, not a promise that one device is universally safer or suitable. A 10mA setting calls for a lower residual-current threshold than 30mA, so it demands a closer review of the circuit, the local installation rules, and expected leakage in normal operation.<\/p>\n<h2 id=\"part-2-which-panel-inputs-belong-in-the-sensitivity-decision\">Part 2. Which panel inputs belong in the sensitivity decision?<\/h2>\n<p>Start with the circuit schedule, single-line diagram, connected-load list, intended users, installation environment, and applicable project rules. These inputs establish whether the decision concerns supplementary personal protection, continuity of supply, or a local requirement that must be confirmed from the project documentation.<\/p>\n<h2 id=\"part-3-why-can-normal-leakage-affect-availability\">Part 3. Why can normal leakage affect availability?<\/h2>\n<p>Electronic equipment and filters can contribute leakage in normal service, while a 10mA setting leaves less margin before an unwanted trip. That does not justify replacing a required sensitivity with a less-sensitive device; it means the panel team should identify circuit grouping and leakage contributors before approving the protection arrangement.<\/p>\n<blockquote><p><strong>Importante:<\/strong> Do not treat residual-current sensitivity as a universal safety upgrade; the required setting must follow the project design and selected-model instructions. (<a href=\"https:\/\/webstore.iec.ch\/\" rel=\"nofollow noopener\" target=\"_blank\">fonte<\/a> \u2014 IEC webstore residual-current device standards discovery)<\/p><\/blockquote>\n<h2 id=\"part-4-how-should-the-panel-drawing-separate-protection-decisions\">Part 4. How should the panel drawing separate protection decisions?<\/h2>\n<p>Keep the residual-current device, protective devices, neutral arrangement, loads, and any control circuits identifiable on the drawings. The drawing should make clear which conductors pass through the sensing path and which downstream circuits share the protective device; the selected product instructions and project design remain controlling.<\/p>\n<h2 id=\"part-5-what-should-an-rfq-say-about-a-30ma-residual-current-device\">Part 5. What should an RFQ say about a 30mA residual current device?<\/h2>\n<p>A useful RFQ identifies the circuit purpose, requested residual-current sensitivity, supply arrangement, load types, environmental context, governing project standard, drawings, and documentation required for the selected model. It should ask the supplier to confirm only the exact model evidence requested, rather than infer ratings or approvals from a category image.<\/p>\n<p>Uma lista de introdu\u00e7\u00e3o de RFQ compacta torna a resposta do fornecedor mais f\u00e1cil de comparar:<\/p>\n<table>\n<thead>\n<tr>\n<th>O comprador deve fornecer<\/th>\n<th>Por que \u00e9 importante<\/th>\n<th>Erro comum<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Conjunto de desenhos atual<\/td>\n<td>Define o limite do circuito<\/td>\n<td>A enviar um nome de produto sem um diagrama<\/td>\n<\/tr>\n<tr>\n<td>Fun\u00e7\u00f5es obrigat\u00f3rias<\/td>\n<td>Torna o pedido pass\u00edvel de revis\u00e3o<\/td>\n<td>Tratar op\u00e7\u00f5es n\u00e3o verificadas como padr\u00e3o<\/td>\n<\/tr>\n<tr>\n<td>Contexto de instala\u00e7\u00e3o<\/td>\n<td>Identifica as condi\u00e7\u00f5es do projeto a confirmar<\/td>\n<td>Assumindo que o texto da categoria \u00e9 uma aprova\u00e7\u00e3o de projeto<\/td>\n<\/tr>\n<tr>\n<td>Pedido de documenta\u00e7\u00e3o<\/td>\n<td>Liga a RFQ \u00e0 evid\u00eancia exacta<\/td>\n<td>Aceitar afirma\u00e7\u00f5es gen\u00e9ricas em vez de dados do modelo<\/td>\n<\/tr>\n<tr>\n<td>Enviar com cita\u00e7\u00e3o<\/td>\n<td>Torna a compara\u00e7\u00e3o de fornecedores audit\u00e1vel<\/td>\n<td>Cita\u00e7\u00e3o sem o pacote de evid\u00eancias solicitado<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Para um contexto mais amplo, reveja o <a href=\"https:\/\/chac-electric.com\/pt\/rccb\/\">30ma residual current device product family<\/a> e o respetivo <a href=\"https:\/\/chac-electric.com\/pt\/aparelhos-electricos-terminais\/\">p\u00e1gina de linha de produtos<\/a>.<\/p>\n<h2 id=\"part-6-which-chac-page-is-the-appropriate-product-starting-point\">Part 6. Which CHAC page is the appropriate product starting point?<\/h2>\n<p>For an early product-family discussion, use the published CQL14 residual-current device page together with the RCCB category. Neither page substitutes for a project design review or selected-model documentation; the final selection must be confirmed against the application and required evidence.<\/p>\n<h3>Recomenda\u00e7\u00e3o de produto<\/h3>\n<p>Use o publicado <a href=\"https:\/\/chac-electric.com\/pt\/product\/cql14-series-electromagnetic-protection-residual-current-device\/\">p\u00e1gina de produto CHAC relevante<\/a> as a documented product route starting point for a product discussion only after the RFQ inputs are complete. OEM buyers who need branded packaging for residual-current devices can open the <a href=\"https:\/\/chac-electric.com\/pt\/personalizacao-de-produtos-eletricos-terminais\/\">RCCB customization discussion<\/a>. Similarity of plastic housings is not evidence that another residual-current device meets the sensitivity and sensing-path requirements on the drawing.<\/p>\n<h2 id=\"part-7-where-does-this-10ma-30ma-comparison-stop-being-enough\">Part 7. Where does this 10mA\/30mA comparison stop being enough?<\/h2>\n<p>This guide suits panel builders and buyers defining the questions around 10mA and 30mA sensitivity. It does not provide live-work instructions, local-code interpretation, coordination approval, or a claim that a listed CHAC product is compatible with a particular panel. Include a drawing review checkpoint so the sensing path and shared downstream circuits are visible before the RFQ is issued.<\/p>\n<p>Fit Boundary: residual-current sensitivity guidance ends at RFQ preparation; it does not set installation approval or local-rule interpretation.<\/p>\n<p>Leitura relacionada: <a href=\"https:\/\/chac-electric.com\/pt\/blogue\/complete-rccb-installation-wiring-guide-for-electrical-contractors-and-distributors\/\">um artigo da CHAC mais restrito e j\u00e1 publicado<\/a> est\u00e1 associado por contexto, e n\u00e3o como substituto para o \u00e2mbito de decis\u00e3o deste artigo.<\/p>\n<p>Send the residual-current schedule, leakage notes, and requested model evidence to <a href=\"https:\/\/chac-electric.com\/pt\/contacte-nos\/\">contactar CHAC Electric<\/a> para uma discuss\u00e3o sobre o rumo do produto.<\/p>\n<blockquote>\n<h5>Recomenda\u00e7\u00e3o de produto<\/h5>\n<h5><a href=\"https:\/\/chac-electric.com\/pt\/product\/pxl9-63-series-electromagnetic-leakage-circuit-breaker\/\">Disjuntor Diferencial Residual com Prote\u00e7\u00e3o de Sobrecorrente RCBO da S\u00e9rie PXL9-63 | CHAC Electric<\/a><\/h5>\n<h5><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3408 alignnone\" src=\"https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/pxl9-63-2p-600x600-1.webp\" alt=\"Disjuntor de Corrente Residual Eletromagn\u00e9tico S\u00e9rie PXL9-63\" width=\"600\" height=\"600\" srcset=\"https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/pxl9-63-2p-600x600-1.webp 600w, https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/pxl9-63-2p-600x600-1-300x300.webp 300w, https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/pxl9-63-2p-600x600-1-150x150.webp 150w, https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/pxl9-63-2p-600x600-1-12x12.webp 12w, https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/pxl9-63-2p-600x600-1-100x100.webp 100w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/h5>\n<\/blockquote>\n<h2 id=\"faqs\">FAQs<\/h2>\n<h3>What is the practical difference between 10mA and 30mA sensitivity?<\/h3>\n<p>They are different residual-current sensitivity settings. The lower setting requires a closer review of circuit leakage, the project requirement, and the consequences of an unwanted trip.<\/p>\n<h3>Does a 10mA setting automatically replace a 30mA setting?<\/h3>\n<p>No. The required sensitivity is set by the installation design and applicable project rules, not by a generic preference for the lowest number.<\/p>\n<h3>Can expected leakage be ignored during panel selection?<\/h3>\n<p>No. Normal-service leakage and circuit grouping should be reviewed because they can affect availability, especially where a lower sensitivity is specified.<\/p>\n<h3>Which drawings should a panel builder provide for an RCCB review?<\/h3>\n<p>Provide the single-line diagram, circuit schedule, neutral arrangement, load information, and the control or distribution drawing needed to understand the circuit boundary.<\/p>\n<h3>What should an RCCB RFQ request from the supplier?<\/h3>\n<p>Request the selected-model documentation, the intended sensitivity, circuit role, supply information, required project evidence, and the drawings that define the installation.<\/p>\n<h3>When should a designer confirm the final residual-current device?<\/h3>\n<p>Confirm it after the circuit inputs and project requirement are complete, and before the panel design is released for manufacture or installation.<\/p>\n<h2 id=\"references\">Refer\u00eancias<\/h2>\n<ul>\n<li><a href=\"https:\/\/webstore.iec.ch\/\" rel=\"nofollow noopener\" target=\"_blank\">IEC webstore for residual-current device standards<\/a><\/li>\n<li><a href=\"https:\/\/assets.new.siemens.com\/siemens\/assets\/api\/uuid:1bbf7aaf-b0fd-41c8-b3a8-e3c1db542b43\/manual-configuracao-dr-2016-en.pdf\" rel=\"nofollow noopener\" target=\"_blank\">Siemens residual-current protection configuration manual<\/a><\/li>\n<li><a href=\"https:\/\/www.iec.ch\/\" rel=\"nofollow noopener\" target=\"_blank\">Comiss\u00e3o Eletrot\u00e9cnica Internacional<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>30ma residual current device selection starts with the circuit role, the project requirement, and selected-model documentation. 30mA vs 10mA RCCB: Sensitivity Selection Questions for Distribution Panels helps panel builders organize those checks before a device is specified or an RFQ is issued. Sensitivity choices stay with the project team and the residual-current device documentation selected [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":3409,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3394","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":7}},"acf":[],"_links":{"self":[{"href":"https:\/\/chac-electric.com\/pt\/wp-json\/wp\/v2\/posts\/3394","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chac-electric.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chac-electric.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/pt\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/pt\/wp-json\/wp\/v2\/comments?post=3394"}],"version-history":[{"count":3,"href":"https:\/\/chac-electric.com\/pt\/wp-json\/wp\/v2\/posts\/3394\/revisions"}],"predecessor-version":[{"id":3416,"href":"https:\/\/chac-electric.com\/pt\/wp-json\/wp\/v2\/posts\/3394\/revisions\/3416"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/pt\/wp-json\/wp\/v2\/media\/3409"}],"wp:attachment":[{"href":"https:\/\/chac-electric.com\/pt\/wp-json\/wp\/v2\/media?parent=3394"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chac-electric.com\/pt\/wp-json\/wp\/v2\/categories?post=3394"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chac-electric.com\/pt\/wp-json\/wp\/v2\/tags?post=3394"}],"curies":[{"name":"bom jogo","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}