Code Basics http://ecmweb.com/taxonomy/term/6615/more en Receptacles in Dwellings http://ecmweb.com/code-basics/receptacles-dwellings <div class="node-body article-body">A single receptacle on an individual branch circuit must have an ampacity at least the rating of the overcurrent device </div> <p><a href="http://ecmweb.com/code-basics/receptacles-dwellings" target="_blank">read more</a></p> http://ecmweb.com/code-basics/receptacles-dwellings#comments Code Basics Design Silver Tue, 14 Feb 2017 17:00:00 +0000 145321 at http://ecmweb.com Branch-Circuit Basics http://ecmweb.com/code-basics/branch-circuit-basics <div class="node-body article-body">Understanding the branch-circuit requirements in Art. 210 is critical to completing Code-compliant installations. </div> <p><a href="http://ecmweb.com/code-basics/branch-circuit-basics" target="_blank">read more</a></p> http://ecmweb.com/code-basics/branch-circuit-basics#comments Code Basics Design Silver Thu, 19 Jan 2017 22:00:00 +0000 144501 at http://ecmweb.com Article 725, Class 2 and 3 Circuits http://ecmweb.com/code-basics/article-725-class-2-and-3-circuits <div class="node-body article-body">If the power source is a listed Class 2 transformer or listed Class 2 power supply — or it’s in listed equipment marked to identify the Class 2 power source </div> <p><a href="http://ecmweb.com/code-basics/article-725-class-2-and-3-circuits" target="_blank">read more</a></p> http://ecmweb.com/code-basics/article-725-class-2-and-3-circuits#comments Code Basics Design Silver Thu, 15 Dec 2016 22:00:00 +0000 143491 at http://ecmweb.com 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