Code Basics http://ecmweb.com/taxonomy/term/6615/more en Article 725, Class 1 Circuits http://ecmweb.com/code-basics/article-725-class-1-circuits <div class="node-body article-body">Circuits that fall under the requirements of Art. 725 are remote-control, signaling, and power-limited circuits that aren’t an integral part of a device or appliance</div> <p><a href="http://ecmweb.com/code-basics/article-725-class-1-circuits" target="_blank">read more</a></p> http://ecmweb.com/code-basics/article-725-class-1-circuits#comments Code Basics Design Silver Fri, 21 Oct 2016 19:00:00 +0000 141571 at http://ecmweb.com Article 695 and Fire Pumps http://ecmweb.com/code-basics/article-695-and-fire-pumps <div class="node-body article-body">In the NEC, the normal philosophy for circuit protection is to shut down equipment before allowing the supply conductors to overheat. </div> <p><a href="http://ecmweb.com/code-basics/article-695-and-fire-pumps" target="_blank">read more</a></p> http://ecmweb.com/code-basics/article-695-and-fire-pumps#comments Code Basics Design Silver Thu, 22 Sep 2016 19:00:00 +0000 140131 at http://ecmweb.com Tip of the Week: Calculating Loads for a Store Building Using Annex D in NFPA 70 (NEC) http://ecmweb.com/electrical-testing/tip-week-calculating-loads-store-building-using-annex-d-nfpa-70-nec <div class="node-body article-body">Example D3 of this annex may be used as a guide for just about any commercial installation. </div> <p><a href="http://ecmweb.com/electrical-testing/tip-week-calculating-loads-store-building-using-annex-d-nfpa-70-nec" target="_blank">read more</a></p> http://ecmweb.com/electrical-testing/tip-week-calculating-loads-store-building-using-annex-d-nfpa-70-nec#comments Code Basics Electrical Testing Tue, 06 Sep 2016 13:00:00 +0000 139651 at http://ecmweb.com Article 690, Solar Photovoltaic Systems — Part 3 http://ecmweb.com/code-basics/article-690-solar-photovoltaic-systems-part-3 <div class="node-body article-body">We can summarize the rules for circuit sizing and overcurrent protection of PV circuits as follows</div> <p><a href="http://ecmweb.com/code-basics/article-690-solar-photovoltaic-systems-part-3" target="_blank">read more</a></p> http://ecmweb.com/code-basics/article-690-solar-photovoltaic-systems-part-3#comments Code Basics Design Silver Fri, 19 Aug 2016 19:00:00 +0000 139051 at http://ecmweb.com Article 690, Solar Photovoltaic Systems — Part 2 http://ecmweb.com/code-basics/article-690-solar-photovoltaic-systems-part-2 <div class="node-body article-body">You must provide ground fault protection for DC photovoltaic (PV) arrays</div> <p><a href="http://ecmweb.com/code-basics/article-690-solar-photovoltaic-systems-part-2" target="_blank">read more</a></p> http://ecmweb.com/code-basics/article-690-solar-photovoltaic-systems-part-2#comments Code Basics Design Silver Mon, 18 Jul 2016 19:30:00 +0000 137971 at http://ecmweb.com Article 690, Solar Photovoltaic Systems — Part 1 http://ecmweb.com/code-basics/article-690-solar-photovoltaic-systems-part-1-0 <div class="node-body article-body">Article 690, consisting of eight Parts, applies to photovoltaic (PV) electrical energy systems, array circuit(s), inverter(s), and charge controller(s) for PV systems. </div> <p><a href="http://ecmweb.com/code-basics/article-690-solar-photovoltaic-systems-part-1-0" target="_blank">read more</a></p> http://ecmweb.com/code-basics/article-690-solar-photovoltaic-systems-part-1-0#comments Code Basics Design Silver Mon, 20 Jun 2016 17:00:00 +0000 136831 at http://ecmweb.com Tip of the Week: The Value of Annex D in NFPA 70 (NEC) http://ecmweb.com/electrical-testing/tip-week-value-annex-d-nfpa-70-nec <div class="node-body article-body">The calculation examples in this annex help you learn how to apply many NEC requirements</div> <p><a href="http://ecmweb.com/electrical-testing/tip-week-value-annex-d-nfpa-70-nec" target="_blank">read more</a></p> http://ecmweb.com/electrical-testing/tip-week-value-annex-d-nfpa-70-nec#comments Code Basics Electrical Testing Mon, 13 Jun 2016 12:00:00 +0000 136591 at http://ecmweb.com Properly Sizing Conductors and Protective Devices for A/C and Refrigeration Equipment http://ecmweb.com/code-basics/properly-sizing-conductors-and-protective-devices-ac-and-refrigeration-equipment <div class="node-body article-body">Article 440 applies to electrically driven air-conditioning and refrigeration equipment</div> <p><a href="http://ecmweb.com/code-basics/properly-sizing-conductors-and-protective-devices-ac-and-refrigeration-equipment" target="_blank">read more</a></p> http://ecmweb.com/code-basics/properly-sizing-conductors-and-protective-devices-ac-and-refrigeration-equipment#comments Code Basics Design Silver Mon, 16 May 2016 17:00:00 +0000 135691 at http://ecmweb.com Don’t Get Burned by the NEC’s Space-Heating Equipment Rules http://ecmweb.com/code-basics/don-t-get-burned-nec-s-space-heating-equipment-rules <div class="node-body article-body">Article 424 is a nine-part article on fixed electric space heating</div> <p><a href="http://ecmweb.com/code-basics/don-t-get-burned-nec-s-space-heating-equipment-rules" target="_blank">read more</a></p> http://ecmweb.com/code-basics/don-t-get-burned-nec-s-space-heating-equipment-rules#comments Code Basics Design Silver Fri, 22 Apr 2016 19:00:00 +0000 134941 at http://ecmweb.com Switchboards, Switchgear, and Panelboards http://ecmweb.com/code-basics/switchboards-switchgear-and-panelboards <div class="node-body article-body">In this industry, some people use the terms switchboard and switchgear interchangeably.</div> <p><a href="http://ecmweb.com/code-basics/switchboards-switchgear-and-panelboards" target="_blank">read more</a></p> http://ecmweb.com/code-basics/switchboards-switchgear-and-panelboards#comments Code Basics Silver Fri, 18 Mar 2016 19:00:00 +0000 133531 at 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