{"id":14068,"date":"2016-05-26T21:31:40","date_gmt":"2016-05-26T21:31:40","guid":{"rendered":"http:\/\/www.iacdrive.com\/2016\/05\/26\/earthing-conductors-size-calculation\/"},"modified":"2016-05-26T21:31:40","modified_gmt":"2016-05-26T21:31:40","slug":"earthing-conductors-size-calculation","status":"publish","type":"post","link":"http:\/\/iacdrive.com\/?p=14068","title":{"rendered":"Earthing conductors size calculation"},"content":{"rendered":"<p>1. As per IEE\/BS7671, The Minimum cross-sectional area of protective conductor in relation to the cross-sectional area of associated line conductor (Say =S mm2) by taking into consideration that are of same material, as follows: <\/p>\n<p>If S \u2264 16 then the Minimum cross-sectional area of the corresponding earth conductor = S mm2 <\/p>\n<p>If 16 &lt; S \u2264 35 then the Minimum cross-sectional area of the corresponding earth conductor = 16 mm2 <\/p>\n<p>if S &gt; 16 , then the Minimum cross-sectional area of the corresponding earth conductor = S\/2 mm2 <\/p>\n<p>2. It may be necessary to verify the same by using the following equation <br \/>\nI\u00b2t \u2264 S\u00b2K <\/p>\n<p>I earth fault current and t tripping time. <\/p>\n<p>while the following equation is applicable for bonding conductor <\/p>\n<p>Zs &lt; 50\/Ia where Zs = Earth loop impedance and Ia is protective device operating current<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. As per IEE\/BS7671, The Minimum cross-sectional area of protective conductor in relation to the cross-sectional area of associated line conductor (Say =S mm2) by taking into consideration that are of same material, as follows: <\/p>\n<p>If S \u2264 16 then the Minimum cross-sectional area of the corresponding earth conductor = S mm2 <\/p>\n<p>If 16 &lt; S \u2264 35 then the Minimum cross-sectional area of the corresponding earth conductor = 16 mm2 <\/p>\n<p>if S &gt; 16 , then the Minimum cross-sectional area of the corresponding earth conductor = S\/2 mm2 <\/p>\n<p>2. It may be necessary to verify the same by using the following equation <br \/>\nI\u00b2t \u2264 S\u00b2K <\/p>\n<p>I earth fault current and t tripping time. <\/p>\n<p>while the following equation is applicable for bonding conductor <\/p>\n<p>Zs &lt; 50\/Ia where Zs = Earth loop impedance and Ia is protective device operating current<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[67],"tags":[],"class_list":["post-14068","post","type-post","status-publish","format-standard","hentry","category-iacdrive_blog"],"_links":{"self":[{"href":"http:\/\/iacdrive.com\/index.php?rest_route=\/wp\/v2\/posts\/14068","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/iacdrive.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/iacdrive.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"http:\/\/iacdrive.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=14068"}],"version-history":[{"count":0,"href":"http:\/\/iacdrive.com\/index.php?rest_route=\/wp\/v2\/posts\/14068\/revisions"}],"wp:attachment":[{"href":"http:\/\/iacdrive.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14068"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/iacdrive.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14068"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/iacdrive.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14068"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}