{"id":1228,"date":"2017-07-27T15:21:34","date_gmt":"2017-07-27T15:21:34","guid":{"rendered":"https:\/\/www.kele.com\/keleblog2\/?p=1228"},"modified":"2017-11-02T16:41:44","modified_gmt":"2017-11-02T16:41:44","slug":"tech-talk-dc-power-supply-and-class-2-labels","status":"publish","type":"post","link":"https:\/\/www.kele.com\/content\/blog\/2017\/07\/27\/tech-talk-dc-power-supply-and-class-2-labels","title":{"rendered":"Tech Talk: DC Power Supply and Class 2 Labels"},"content":{"rendered":"<p><strong>Q. The Inspector says my DC power supply needs a Class 2 label. What\u2019s he talking about?<\/strong><\/p>\n<p>The Inspector is referring to the requirements of Class 2 circuits and wiring as defined in the National Electric Code (NEC). The definition of Class 2 circuits specifies the wiring system between the load side of a Class 2 power source and the connected equipment. The definition includes current and voltage limitations [NEC Table 11(A) and Table 11(B)]\u00a0to limit the possibility of fire initiation and electric shock. Class 2 circuits offer reduced requirements for wire size, wire insulation, over-current protection, wiring methods and installation materials and can be advantageous in reducing cost and improving flexibility of an installation. Also, many local municipalities now require that the NEC Class 2 standard be maintained in public buildings, schools and hospitals.<!--more Read more--><\/p>\n<p>To be approved by the local Authority Having Jurisdiction (AHJ), one requirement for a Class 2 circuit is that the power source for that circuit must meet the definition of a Class 2 power source as specified in the NEC.\u00a0In accordance to NEC 2017, a Class 2 power source for DC powered circuits must be a listed Class 2 power supply [NEC Article 725.121(A)]. A listed Class 2 DC power supply is tested and certified by a third-party testing organizations like Underwriters Laboratories to meet Class 2 requirements and will have a label designating it as a listed Class 2 power source. Kele offers a selection of listed Class 2 DC power supplies. Look in the <a href=\"https:\/\/www.kele.com\/power-supplies-home.aspx\">Power Supplies<\/a> section of Kele.com\u00a0and some models of the <a href=\"https:\/\/www.kele.com\/power-supplies\/ps5r-series.aspx\">PS5R Series<\/a> that carry the Class 2 listing.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Q. The Inspector says my DC power supply needs a Class 2 label. What\u2019s he talking about? The Inspector is referring to the requirements of Class 2 circuits and wiring as defined in the National Electric Code (NEC). The definition of Class 2 circuits specifies the wiring system between the load side of a Class [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[13],"tags":[],"class_list":["post-1228","post","type-post","status-publish","format-standard","hentry","category-technically-speaking"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\r\n<title>Tech Talk: DC Power Supply and Class 2 Labels - kele.com<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.kele.com\/content\/blog\/2017\/07\/27\/tech-talk-dc-power-supply-and-class-2-labels\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"Tech Talk: DC Power Supply and Class 2 Labels - kele.com\" \/>\r\n<meta property=\"og:description\" content=\"Q. The Inspector says my DC power supply needs a Class 2 label. What\u2019s he talking about? The Inspector is referring to the requirements of Class 2 circuits and wiring as defined in the National Electric Code (NEC). 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