{"id":5083,"date":"2026-03-12T12:23:26","date_gmt":"2026-03-12T11:23:26","guid":{"rendered":"http:\/\/marechal.local\/article\/aluminium-conductor-to-industrial-socket-marechal\/"},"modified":"2026-09-14T16:28:49","modified_gmt":"2026-09-14T14:28:49","slug":"aluminium-conductor-to-industrial-socket-marechal","status":"publish","type":"post","link":"https:\/\/marechal.com\/en\/article\/aluminium-conductor-to-industrial-socket-marechal\/","title":{"rendered":"CONNECTING ALUMINUM CONDUCTORS TO MARECHAL\u00ae PLUGS AND SOCKET-OUTLETS AND CONNECTORS: WHAT CAN BE DONE SAFELY AND RELIABLY."},"content":{"rendered":"\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\"><strong><strong><strong>Can you wire an aluminium conductor to industrial socket MARECHAL<sup>\u00ae<\/sup>?<\/strong><\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">It is entirely possible to wire an <strong>aluminium conductor to industrial socket<\/strong> MARECHAL<sup>\u00ae<\/sup>, provided that specific technical rules and installation best practice are strictly followed.<\/p>\n<\/div><\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\"><strong><strong><strong>Why aluminum is increasingly used across industrial applications<\/strong><\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminum-core conductors and cables are now <strong>widely deployed across many industrial sectors<\/strong>, particularly for high-power installations and distribution networks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Compared to copper, aluminum provides several clear and <strong>measurable advantages<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Lower weight<\/strong><\/li>\n\n\n\n<li><strong>Lower <\/strong>raw material<strong> cost<\/strong><\/li>\n\n\n\n<li>Strong resistance to <strong>atmospheric corrosion<\/strong><\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\"><strong><strong><strong>Aluminum vs copper: what really matters in practice<\/strong><\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminum offers a better conductivity-to-weight ratio than copper.<br>At equivalent weight, it can carry more current.<br>However, a larger conductor cross-section is required to achieve equivalent electrical performance.<\/p>\n<\/div><\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group is-style-twentytwentyone-border has-marechal-one-background-color has-text-color has-background has-link-color wp-elements-1\" style=\"color:#ffffff\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading has-text-align-left has-marechal-five-color has-marechal-one-background-color has-text-color has-background has-link-color wp-elements-2\" style=\"padding-top:0;padding-bottom:0;padding-left:0\"><strong><strong>PRACTICAL EXAMPLE (EQUIVALENT ELECTRICAL PERFORMANCE<\/strong>)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-white-color has-text-color has-link-color wp-elements-3\">\n<li class=\"has-text-color has-link-color wp-elements-4\" style=\"color:#ffffff\">A rigid copper cable with a 25 mm\u00b2 cross-section typically has an outer diameter of 12.5 mm.<\/li>\n\n\n\n<li class=\"has-text-color has-link-color wp-elements-5\" style=\"color:#ffffff\">To achieve equivalent performance, a rigid aluminum cable requires a 35 mm\u00b2 cross-section, resulting in an outer diameter of approximately 13.5 mm.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-left has-marechal-five-color has-marechal-one-background-color has-text-color has-background has-link-color wp-elements-6\" style=\"padding-top:0;padding-bottom:0;padding-left:0\"><strong><strong>TECHNICAL COMPARISON<\/strong> <strong>SUMMARY<\/strong><\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-regular\"><table class=\"has-marechal-one-background-color has-text-color has-background has-link-color\" style=\"color:#fefefe\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\"><strong><strong><strong>Criterion<\/strong><\/strong><\/strong><\/th><th class=\"has-text-align-left\" data-align=\"left\"><strong><strong><strong>Copper<\/strong><\/strong><\/strong><\/th><th><strong><strong><strong>Aluminum<\/strong><\/strong><\/strong><\/th><th class=\"has-text-align-left\" data-align=\"left\"><strong><strong><strong>Observation<\/strong><\/strong><\/strong><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>Conductivity <\/strong>(in m\/(\u03a9.mm\u00b2), at 20 \u00b0C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">56<\/td><td>35<\/td><td class=\"has-text-align-left\" data-align=\"left\">Copper is 1.5 times more conductive than aluminum.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>Density <\/strong>(kg\/m<sup>3<\/sup>)<\/td><td class=\"has-text-align-left\" data-align=\"left\">8.920<\/td><td>2.700<\/td><td class=\"has-text-align-left\" data-align=\"left\">Aluminum is 3 times lighter than copper.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>Costs<\/strong><br>($\/ton, as of 2025-11)<\/td><td class=\"has-text-align-left\" data-align=\"left\">10.600<\/td><td>2.500<\/td><td class=\"has-text-align-left\" data-align=\"left\">Aluminum is more than 4 times more cost-effective than copper.<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\"><strong><strong><strong><strong>The key technical consideration: galvanic corrosion<\/strong><\/strong><\/strong><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">MARECHAL<sup>\u00ae<\/sup> devices are equipped with <strong>copper terminals<\/strong> and are <strong>certified for use with copper-core conductors<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When two dissimilar metals \u2014 such as copper and aluminum \u2014 are in contact, they are subject to electrochemical degradation known as \u00ab <strong>galvanic corrosion<\/strong> \u00bb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>This phenomenon is well understood and fully manageable in industrial environments <\/strong>when proven installation solutions are applied.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading has-marechal-five-color has-marechal-three-background-color has-text-color has-background has-link-color wp-elements-7\"><strong>SEVERAL SOLUTIONS ARE AVAILABLE TO MITIGATE THIS PHENOMENON, ENABLING SAFE AND LONG-TERM WIRING OF AN ALUMINUM CONDUCTOR TO INDUSTRIAL SOCKET MARECHAL<sup>\u00ae<\/sup>:<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1500\" height=\"900\" src=\"https:\/\/marechal.com\/wp-content\/uploads\/2026\/07\/Article-Conducteurs-aluminium.webp\" alt=\"aluminium conductor to industrial socket\" class=\"wp-image-5077\" srcset=\"https:\/\/marechal.com\/wp-content\/uploads\/2026\/07\/Article-Conducteurs-aluminium.webp 1500w, https:\/\/marechal.com\/wp-content\/uploads\/2026\/07\/Article-Conducteurs-aluminium-300x180.webp 300w, https:\/\/marechal.com\/wp-content\/uploads\/2026\/07\/Article-Conducteurs-aluminium-1024x614.webp 1024w, https:\/\/marechal.com\/wp-content\/uploads\/2026\/07\/Article-Conducteurs-aluminium-768x461.webp 768w\" sizes=\"auto, (max-width: 1500px) 100vw, 1500px\" \/><figcaption class=\"wp-element-caption\">#image_title<\/figcaption><\/figure>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h4 class=\"wp-block-heading\"><strong><strong>Solution 1 \u2013 Direct connection into MARECHAL<sup>\u00ae<\/sup> terminals<\/strong><\/strong><\/h4>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\"><div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"100\" src=\"https:\/\/marechal.com\/wp-content\/uploads\/2026\/07\/Borne-ME-4.webp\" alt=\"\" class=\"wp-image-5078\" style=\"width:120px;height:auto\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<ol class=\"wp-block-list\">\n<li>Lightly abrade the surface of the conductor core that will be in contact with the terminal,<\/li>\n\n\n\n<li>Apply an aluminum\/copper contact grease to optimize contact resistance and limit galvanic corrosion between the aluminum conductor and copper terminal,<\/li>\n\n\n\n<li>Insert the conductor into the terminal and apply the tightening torque specified in the instruction sheet.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>This method enables:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduced contact resistance<\/li>\n\n\n\n<li>Significant reduction of galvanic corrosion risk<\/li>\n\n\n\n<li>Long-term mechanical reliability.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-marechal-one-color has-marechal-five-background-color has-text-color has-background has-link-color wp-elements-8 wp-block-paragraph\"><strong><strong>Contact grease availability<\/strong><\/strong><br>MARECHAL ELECTRIC supplies its own aluminum\/copper contact grease under reference <strong>9GREASE-CTC-T<\/strong> (200 g).<\/p>\n\n\n\n<div style=\"height:64px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h4 class=\"wp-block-heading\"><strong><strong><strong>Solution 2 \u2013 Indirect connection into MARECHAL<sup>\u00ae<\/sup> terminals via bimetallic lug or ferrule<\/strong><\/strong><\/strong><\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Select an aluminum\/copper \u201cbimetallic\u201d lug or ferrule.<\/li>\n\n\n\n<li>Wire the aluminum conductor into the aluminum section of the lug or ferrule.<\/li>\n\n\n\n<li>Crimp the conductor.<\/li>\n\n\n\n<li>Insert the lug or ferrule into the terminal and apply the tightening torque specified in the instruction sheet.<\/li>\n<\/ol>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:19% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"100\" src=\"https:\/\/marechal.com\/wp-content\/uploads\/2026\/07\/Embout-reducteuramplificateur-bi-metal-aluminium-cuivre-2.webp\" alt=\"\" class=\"wp-image-5079 size-full\" \/><\/figure><div class=\"wp-block-media-text__content\">\n\n<p class=\"has-extra-small-font-size wp-block-paragraph\"><em><em>Aluminum-copper bimetallic reducer or enlarger ferrule<\/em><\/em><\/p>\n\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:19% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"100\" src=\"https:\/\/marechal.com\/wp-content\/uploads\/2026\/07\/Cosse-bi-metal-aluminium-cuivre-a-oeillet-1.webp\" alt=\"\" class=\"wp-image-5080 size-full\" \/><\/figure><div class=\"wp-block-media-text__content\">\n\n<p class=\"has-extra-small-font-size wp-block-paragraph\"><em><em><em><em><em>Aluminum-copper bimetallic lug<br>(eyelet type)<\/em><\/em><\/em><\/em><\/em><\/p>\n\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>This is the preferred solution for large conductor cross-sections, helping to minimize temperature rises risks.<\/strong><\/p>\n<\/div><\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group has-marechal-one-background-color has-text-color has-background has-link-color wp-elements-9\" style=\"color:#ffffff\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading has-text-align-left has-marechal-five-color has-marechal-one-background-color has-text-color has-background has-link-color wp-elements-10\" style=\"padding-top:0;padding-bottom:0;padding-left:0\"><strong><strong>KEY TAKEAWAYS<\/strong><\/strong><\/h3>\n\n\n\n<ul style=\"color:#ffffff;padding-top:0;padding-bottom:0\" class=\"wp-block-list has-marechal-one-background-color has-text-color has-background has-link-color wp-elements-11\">\n<li>Yes, aluminum conductors can be used with MARECHAL<sup>\u00ae<\/sup> devices.<\/li>\n\n\n\n<li>The solutions are standardised, industry-recognised, and field-proven.<\/li>\n\n\n\n<li>Safety and durability depend primarily on correct installation practices \u2014 not on conductor material alone.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When these best practices are applied, <strong>MARECHAL<sup>\u00ae<\/sup><\/strong> devices can be <strong>safely and reliably<\/strong> used with aluminum-core conductors and cables, <strong>without compromising connection performance and durability<\/strong>.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div style=\"--wp--block-button--width: 100;\" class=\"wp-block-button has-custom-width wp-block-button__width wp-block-button__width-100\"><a class=\"wp-block-button__link has-marechal-one-background-color has-background has-text-align-center has-normal-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/marechal.com\/en\/products\/high-current-connectors-from-16a-to-1250a\/\" style=\"border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-left-radius:0px;border-bottom-right-radius:0px\" target=\"_blank\" rel=\"noreferrer noopener\">\u25b6\ufe0f <strong>Safety built-in industrial electrical power connections<\/strong><\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><strong><strong>Questions? Technical support needed?<\/strong><\/strong><\/strong><br>Our teams are available to help you select the solution best suited to your industrial environment and operational constraints.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-left is-layout-flex wp-container-core-buttons-is-layout-63375db1 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link has-white-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/marechal.com\/en\/contact\/\" style=\"border-radius:40px;color:#39bdde;padding-top:0;padding-bottom:0;font-style:normal;font-weight:600;text-transform:uppercase\">Contact<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Can you wire an aluminium conductor to industrial socket MARECHAL\u00ae? It is entirely possible to wire an aluminium conductor to industrial socket MARECHAL\u00ae, provided that specific technical rules and installation best practice are strictly followed. Why aluminum is increasingly used across industrial applications Aluminum-core conductors and cables are now widely deployed across many industrial sectors, [&hellip;]<\/p>\n","protected":false},"author":115,"featured_media":111353,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[884],"class_list":["post-5083","post","type-post","status-publish","format-standard","has-post-thumbnail","category-markets-and-applications-en"],"acf":[],"_links":{"self":[{"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/posts\/5083","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/users\/115"}],"replies":[{"embeddable":true,"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/comments?post=5083"}],"version-history":[{"count":4,"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/posts\/5083\/revisions"}],"predecessor-version":[{"id":119608,"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/posts\/5083\/revisions\/119608"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/media\/111353"}],"wp:attachment":[{"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/media?parent=5083"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/categories?post=5083"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}