{"id":1862,"date":"2023-02-22T11:41:34","date_gmt":"2023-02-22T10:41:34","guid":{"rendered":"https:\/\/www.gt-engineering.it\/approfondimenti\/%tipologia_approfondimento%\/colore-comune-60204-1-en\/"},"modified":"2023-08-07T08:00:11","modified_gmt":"2023-08-07T07:00:11","slug":"colore-comune-60204-1-en","status":"publish","type":"approfondimento","link":"https:\/\/www.gt-engineering.it\/en\/insights\/electrical-hazard-and-arc-flash-mitigation\/colore-comune-60204-1-en\/","title":{"rendered":"What colour is the neutral conductor according to EN 60204-1?"},"content":{"rendered":"\n\n    \n        <section\n            data-name=\"Contenuto testuale con immagine\"\n            class=\"bow-gte-testo-media u-spacer-base\"\n            id=\"\"\n        >\n            \n<div class=\"o-text-media px-side-spacer sm:px-side-spacer-sm lg:px-side-spacer-tablet 2xl:px-side-spacer-desktop flex flex-wrap items-start md:block\">\n\n    \n        \n                    <div\n                class=\"h-auto mb-6 md:mb-4 lg:mb-8 xl:mb-9 float-left mr-6 md:mr-4 lg:mr-8 xl:mr-9  overflow-hidden shadow-content-image w-full md:w-1\/3\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"150\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/02\/32.png-1-150x150.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"300\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/02\/32.png-1-300x300.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 569px)\"\r\n                                width=\"569\"\r\n                                height=\"570\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/02\/32.png-1.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 569px)\"\r\n                                width=\"569\"\r\n                                height=\"570\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/02\/32.png-1.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/02\/32.png-1.webp\"\r\n                                                        title=\"32.png\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\n        \n                    <div class=\"relative w-full\">\n                \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p style=\"margin:0cm 0cm 8pt\"><strong><span style=\"margin:0cm 0cm 8pt;\"><span style=\"text-align:justify;\">THE DOUBT:<\/span><\/span><\/strong><span style=\"font-size:11pt\"><span style=\"line-height:107%\"><span style=\"font-family:Calibri,sans-serif\"><b><span lang=\"EN-GB\" style=\"font-size:12.0pt\"><span style=\"line-height:107%\">&nbsp;<\/span><\/span><\/b><\/span><\/span><\/span><span style=\"text-align:justify;\">Most of us know that Light Blue is the colour of the neutral conductor inside an industrial control panel. The doubt is the colour of the &ldquo;common conductor&rdquo; on the secondary of either a Power or a Control Transformer.<\/span><\/p>\n<p style=\"margin:0cm 0cm 8pt\"><span style=\"margin:0cm 0cm 8pt;\"><strong><span style=\"text-align:justify;\">CONSIDERATIONS:<\/span><\/strong><\/span><\/p>\n<p style=\"margin:0cm 0cm 8pt\"><span style=\"margin:0cm 0cm 8pt;\"><span style=\"text-align:justify;\">In order to clarify the matter, it is important to understand when a conductor can be defined as a Neutral Conductor. IEC 60445 helps us in that:<\/span><\/span><\/p>\n<p style=\"margin-left:18.0pt; margin:0cm 0cm 8pt\"><span style=\"margin:0cm 0cm 8pt;\"><span style=\"text-align:justify;\"><em><strong>[IEC 60445:2018] 3.8 neutral conductor:<\/strong><\/em> conductor electrically connected to the neutral point and capable of contributing to the distribution of electric energy.<\/span><\/span><\/p>\n<p><span style=\"margin:0cm 0cm 8pt;\"><span style=\"text-align:justify;\">The same definition is in IEC 60204-1 article 3.1.42.<\/span><\/span><\/p>\n<p style=\"margin:0cm 0cm 8pt\"><span style=\"margin:0cm 0cm 8pt;\"><span style=\"text-align:justify;\">From that definition comes the fact the neutral is only the conductor connected to the common point of a MT\/BT transformer.<\/span><\/span><\/p>\n<p style=\"margin:0cm 0cm 8pt\"><span style=\"margin:0cm 0cm 8pt;\"><span style=\"text-align:justify;\">When a transformer is used inside a control panel, that is not for distributing electrical energy but to either power receptacles or control systems. For that reason, the colour should not be light blue but black if it is a power transformer or red in case of a control one.<\/span><\/span><\/p>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n\n\n\n\n    \n        <section\n            data-name=\"Contenuto testuale con immagine\"\n            class=\"bow-gte-testo-media u-spacer-base\"\n            id=\"\"\n        >\n            \n<div class=\"o-text-media px-side-spacer sm:px-side-spacer-sm lg:px-side-spacer-tablet 2xl:px-side-spacer-desktop flex flex-wrap items-start flex-col\">\n\n    \n\n        \n        \n    <\/div>\n        <\/section>\n\n    \n\n\n\n\n    \n        <section\n            data-name=\"Contenuto testuale con immagine\"\n            class=\"bow-gte-testo-media u-spacer-base\"\n            id=\"\"\n        >\n            \n<div class=\"o-text-media px-side-spacer sm:px-side-spacer-sm lg:px-side-spacer-tablet 2xl:px-side-spacer-desktop flex flex-wrap items-start md:block\">\n\n    \n        \n        \n                    <div class=\"relative w-full\">\n                \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p style=\"margin:0cm 0cm 8pt\"><span style=\"margin:0cm 0cm 8pt;\"><span style=\"text-align:justify;\"><strong>CONCLUSION<\/strong>: The colour of the cables connected to the &ldquo;common pole&rdquo; of a transformer inside an industrial control panel shall not be light blue but of the same colour of the cables derived from the &ldquo;positive pole&rdquo;. The reason is that such a conductor cannot be defined as a Neutral.<\/span><\/span><\/p>\n<p><span style=\"margin:0cm 0cm 8pt;\"><span style=\"text-align:justify;\">We also remind you that the &ldquo;common pole&rdquo; <strong>has to be grounded<\/strong> as indicated in the following picture.<\/span><\/span><\/p>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n\n\n\n\n    \n        <section\n            data-name=\"Contenuto testuale con immagine\"\n            class=\"bow-gte-testo-media u-spacer-base\"\n            id=\"\"\n        >\n            \n<div class=\"o-text-media px-side-spacer sm:px-side-spacer-sm lg:px-side-spacer-tablet 2xl:px-side-spacer-desktop flex flex-wrap items-start md:block\">\n\n    \n        \n                    <div\n                class=\"h-auto mb-6 md:mb-4 lg:mb-8 xl:mb-9 float-left mr-6 md:mr-4 lg:mr-8 xl:mr-9  overflow-hidden shadow-content-image w-full md:w-1\/2\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"150\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Colour-of-conductors-EN-60204-1-1-150x150.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"173\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Colour-of-conductors-EN-60204-1-1-300x173.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 768px)\"\r\n                                width=\"768\"\r\n                                height=\"442\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Colour-of-conductors-EN-60204-1-1-768x442.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 885px)\"\r\n                                width=\"885\"\r\n                                height=\"509\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Colour-of-conductors-EN-60204-1-1.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Colour-of-conductors-EN-60204-1-1.jpg.webp\"\r\n                                                        title=\"Colour-of-conductors-EN-60204-1-1\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\n        \n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n","protected":false},"excerpt":{"rendered":"<p>THE DOUBT:&nbsp;Most of us know that Light Blue is the colour of the neutral conductor inside an industrial control panel. The doubt is the colour of the &#038;ldquo&#8230;<\/p>\n","protected":false},"author":1,"featured_media":33180,"parent":0,"menu_order":88,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tipologia_approfondimento":[51],"class_list":["post-1862","approfondimento","type-approfondimento","status-publish","has-post-thumbnail","hentry","tipologia_approfondimento-electrical-hazard-and-arc-flash-mitigation"],"acf":{"sottotitolo":"","allegati":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What colour is the neutral conductor according to EN 60204-1?<\/title>\n<meta name=\"description\" content=\"THE DOUBT:&lt;span style=&quot;font-siz...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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