{"id":118,"date":"2026-10-08T10:00:00","date_gmt":"2026-10-08T06:30:00","guid":{"rendered":"https:\/\/sanatiblog.ir\/blog\/wire-size-for-your-load\/"},"modified":"2026-10-08T10:00:00","modified_gmt":"2026-10-08T06:30:00","slug":"wire-size-for-your-load","status":"publish","type":"post","link":"https:\/\/sanatiblog.ir\/fa\/blog\/wire-size-for-your-load\/","title":{"rendered":"\u0633\u06cc\u0645 \u0648 \u06a9\u0627\u0628\u0644: \u0686\u0647 \u0633\u0627\u06cc\u0632\u06cc \u0628\u0631\u0627\u06cc \u0686\u0647 \u0628\u0627\u0631\u06cc\u061f"},"content":{"rendered":"<p>A wire that is too thin gets hot. Over months the insulation hardens and cracks, and that is how many electrical fires start. Choosing the size is the first job.<\/p>\n<h2>A rough guide (copper, short runs inside a building)<\/h2>\n<ul>\n<li>1.5 mm\u00b2: lighting, on a 10 A breaker.<\/li>\n<li>2.5 mm\u00b2: sockets, on a 16 A breaker.<\/li>\n<li>4 mm\u00b2: up to about 25 A.<\/li>\n<li>6 mm\u00b2: up to about 32 A.<\/li>\n<\/ul>\n<p>The breaker protects the cable, so the cable must always be able to carry the breaker&#8217;s current. Long runs (more than about 30 m), cables in hot places and many cables bundled together need a bigger size. For anything beyond a simple circuit, ask an electrician to calculate it.<\/p>\n<h2>Copper or aluminium<\/h2>\n<p>Aluminium is cheaper and lighter, but carries less current: you need a bigger size, and special lugs at the ends. For building wiring and machines, copper is the usual choice.<\/p>\n<h2>Solid or flexible<\/h2>\n<p>Solid (one thick strand) is for fixed wiring inside walls. Flexible (many fine strands) is for machines, panels and anything that moves or vibrates.<\/p>\n<h2>Undersized cable is a real problem<\/h2>\n<p>Some cables sold as 2.5 mm\u00b2 have less copper than that. Buy known brands from known sellers, and compare the weight of a coil with another brand&#8217;s. Check the voltage rating too: 450\/750 V for building wire, 0.6\/1 kV for power cables.<\/p>\n<p>What to tell the seller: size, number of cores (for example 3\u00d72.5 or 5\u00d76), copper or aluminium, solid or flexible, and the length.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u06cc\u06a9 \u0631\u0627\u0647\u0646\u0645\u0627\u06cc \u062a\u0642\u0631\u06cc\u0628\u06cc \u0633\u0627\u06cc\u0632\u060c \u0645\u0633 \u06cc\u0627 \u0622\u0644\u0648\u0645\u06cc\u0646\u06cc\u0648\u0645\u060c \u0648 \u0627\u06cc\u0646\u06a9\u0647 \u06a9\u0627\u0628\u0644 \u06a9\u0645\u200c\u0645\u0642\u0637\u0639 \u0631\u0627 \u0686\u0637\u0648\u0631 \u0628\u0634\u0646\u0627\u0633\u06cc\u0645.<\/p>\n","protected":false},"author":0,"featured_media":133,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-118","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/posts\/118","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/comments?post=118"}],"version-history":[{"count":0,"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/posts\/118\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/media\/133"}],"wp:attachment":[{"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/media?parent=118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/categories?post=118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sanatiblog.ir\/fa\/wp-json\/wp\/v2\/tags?post=118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}