{"id":192934,"date":"2026-03-12T12:23:26","date_gmt":"2026-03-12T11:23:26","guid":{"rendered":"https:\/\/marechal.com\/?post_type=news&#038;p=192934"},"modified":"2026-03-13T09:26:53","modified_gmt":"2026-03-13T08:26:53","slug":"aluminium-conductor-to-industrial-socket-marechal","status":"publish","type":"news","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>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>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>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>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-fe75fbc8642de209416f9db7dfb8442b\" 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-683db0c1be1605f65d369fdf8153f42d\" 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-d502d472f421bf060bef32f5d1abb597\">\n<li class=\"has-text-color has-link-color wp-elements-5b894983e21ed7cb5f412e69e2d651df\" 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-fe3cc41b2adc757c348159c930a976cc\" 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-66bf2d785aa1bb95214151b0387b41d0\" 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>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>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><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-5addcc7aafffadd01cfea1bfc8bc28ce\"><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=\"1024\" height=\"614\" src=\"https:\/\/marechal.com\/wp-content\/uploads\/2026\/03\/Article-Conducteurs-aluminium-1024x614.png\" alt=\"aluminium conductor to industrial socket\" class=\"wp-image-192996\" srcset=\"https:\/\/marechal.com\/wp-content\/uploads\/2026\/03\/Article-Conducteurs-aluminium-1024x614.png 1024w, https:\/\/marechal.com\/wp-content\/uploads\/2026\/03\/Article-Conducteurs-aluminium-300x180.png 300w, https:\/\/marechal.com\/wp-content\/uploads\/2026\/03\/Article-Conducteurs-aluminium-768x461.png 768w, https:\/\/marechal.com\/wp-content\/uploads\/2026\/03\/Article-Conducteurs-aluminium.png 1500w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><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<h5 class=\"wp-block-heading\"><strong><strong>Solution 1 \u2013 Direct connection into MARECHAL<sup>\u00ae<\/sup> terminals<\/strong><\/strong><\/h5>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 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\/02\/Borne-ME-4.png\" alt=\"\" class=\"wp-image-192570\" 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><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-9acf1177d9dcadb45140a25419cf9ca0\"><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<h5 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><\/h5>\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\/02\/Embout-reducteuramplificateur-bi-metal-aluminium-cuivre-2.png\" alt=\"\" class=\"wp-image-192620 size-full\"\/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"has-extra-small-font-size\"><em><em>Aluminum-copper bimetallic reducer or enlarger ferrule<\/em><\/em><\/p>\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\/02\/Cosse-bi-metal-aluminium-cuivre-a-oeillet-1.png\" alt=\"\" class=\"wp-image-192610 size-full\"\/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"has-extra-small-font-size\"><em><em><em><em><em>Aluminum-copper bimetallic lug<br>(eyelet type)<\/em><\/em><\/em><\/em><\/em><\/p>\n<\/div><\/div>\n\n\n\n<p><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-f0681fce4e6c0fb834bfb11a968e18c3\" 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-cd754e04170958b1917d9b969d2961d2\" 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-00fdd59f37e69a50004195dc97a8ca82\">\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>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-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100\"><a class=\"wp-block-button__link has-marechal-one-background-color has-background has-normal-font-size has-text-align-center has-custom-font-size wp-element-button\" href=\"https:\/\/marechal.com\/en\/products\/high-current-connectors-from-16a-to-1250a\/\" 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><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-fdcfc74e 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\/\" 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