National Electrical Code (NEC) http://ecmweb.com/taxonomy/term/19731/more en Adding a 7th Meter http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/adding-7th-meter <div class="node-body forum-body"><p>Here&#39;s the situation.</p> <p>A residential building has six&nbsp;apartments under one roof. Electric uUtility service comes from the street to a weatherhead, and three&nbsp;500kcmil + GRN connections are made at the the weatherhead between utility and service entry cable. Service cable enters the building basement and goes through a trough. From the trough, six&nbsp;meter connections are made. After the meters there are&nbsp;individual 2-pole circuit breaker boxes. From these&nbsp;boxes each apartment is fed by its&nbsp;dedicated panel.</p> </div><p><a href="http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/adding-7th-meter" target="_blank">read more</a></p> http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/adding-7th-meter#comments National Electrical Code (NEC) Fri, 10 Mar 2017 18:49:48 +0000 146081 at http://ecmweb.com NEC 220-18 and Table 220-19 http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/nec-220-18-and-table-220-19 <div class="node-body forum-body"><p>I&#39;m hoping one of you folks can help me.</p> <p>I&#39;m working on a residential electrical load calculation for a new 400A service panel from one of the local Building and Safety jurisdictions, and they mention &quot;Rating from Table 220-19&quot;&nbsp;and NEC 220-18.&nbsp;They are using the 2013 version of the California Electrical Code.&nbsp;I don&#39;t have a copy of this&nbsp;code. I had&nbsp;hoped to be able to find it online but I haven&#39;t had any success.</p> <p>Does anyone here have access to those code sections?</p> </div> http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/nec-220-18-and-table-220-19#comments National Electrical Code (NEC) Tue, 14 Feb 2017 01:38:48 +0000 145291 at http://ecmweb.com Table 220.55, Note 4 http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/table-22055-note-4 <div class="node-body forum-body"><p>Hi Everyone!</p> <p>I was recently practicing dwelling unit calculations and went trough this article called:&nbsp;<span>Dwelling Unit Feeder/S</span><span>ervice Conductor Calculations by Mike Holt (August 2004, EC&amp;M)</span>. Can anyone explain&nbsp;why you use&nbsp;Note&nbsp;3 of Table&nbsp;220.55 instead of Note 4? Any explanation or related info will appreciated.</p> <p>I don&#39;t see how to paste the article link here.</p> <p>Thanks!</p> </div> http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/table-22055-note-4#comments National Electrical Code (NEC) Wed, 08 Feb 2017 16:02:12 +0000 145141 at http://ecmweb.com NEC Class 2 Power Source http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/nec-class-2-power-source <div class="node-body forum-body"><p>Can anyone please let me know when must a Class 2 power source be used? I can find&nbsp;information as to the requirements of the Class 2 power source itself, or the Class 2 wiring, but couldn&#39;t find clear information on when they must be used in the first place.</p> </div> http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/nec-class-2-power-source#comments National Electrical Code (NEC) Fri, 06 Jan 2017 05:35:14 +0000 144081 at http://ecmweb.com Hazardous Location Class 1 Div 2 On A Building http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/hazardous-location-class-1-div-2-building <div class="node-body forum-body"><p>Hi All,</p> <p>We have a small chemical storage building (all liquids) that we are going to be installing in the near future. I am part of the electrical team assisting in classification (not done one before). As I am trying to get myself familiar with the NEC standards, I was hoping I could get some insight. The building should have adequate ventilation so the building will be classified as Class 1 Div 2.</p> </div><p><a href="http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/hazardous-location-class-1-div-2-building" target="_blank">read more</a></p> http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/hazardous-location-class-1-div-2-building#comments National Electrical Code (NEC) Thu, 27 Oct 2016 22:21:38 +0000 141901 at http://ecmweb.com GFCI/AFCI and 2014 NEC http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/gfciafci-and-2014-nec <div class="node-body forum-body"><p>According to the 2014 NEC,&nbsp;a&nbsp;map of home sections&nbsp;is similar to this:</p> <p>Laundry - GFCI and AFCI protection<br /> Garage - GFCI and AFCI protection<br /> Kitchen - GFCI and AFCI protection<br /> Living room - AFCI&nbsp;Protecion<br /> Bedrooms - AFCI&nbsp;Protecion<br /> Bathrooms - GFCI&nbsp;Protecion<br /> Dining room - AFCI&nbsp;Protecion<br /> Foyer - AFCI&nbsp;Protecion</p> <p>‚ÄčThank&nbsp;you!</p> </div> http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/gfciafci-and-2014-nec#comments National Electrical Code (NEC) Thu, 27 Oct 2016 21:18:33 +0000 141891 at http://ecmweb.com Cat. 5e and MC Cable in Same Conduit? http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/cat-5e-and-mc-cable-same-conduit <div class="node-body forum-body"><p>There was a contractor that came in and ran power and data to a piece of video equipment. They ran one 3/4 in.&nbsp;conduit down to it that has both MC&nbsp;Cable and Cat. 5e cable in it. Does the NEC allow this?</p> </div> http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/cat-5e-and-mc-cable-same-conduit#comments National Electrical Code (NEC) Mon, 17 Oct 2016 00:38:28 +0000 141351 at http://ecmweb.com Fire Rated Cable for Protective Earth Conductor http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/fire-rated-cable-protective-earth-conductor <div class="node-body forum-body"><p>Good day to all. I&nbsp;hope someone can help me.</p> <p>In TNS system, for fire pump and smoke extraction fan in commercial / industrial setting, is &nbsp;the earth conductor required to be fire rated cable? (where as all phase conductor and neutral cables are fire rated cable)</p> </div> http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/fire-rated-cable-protective-earth-conductor#comments National Electrical Code (NEC) Mon, 03 Oct 2016 02:36:42 +0000 140661 at http://ecmweb.com Refrigerator Breaker Question http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/refrigerator-breaker-question <div class="node-body forum-body"><p>We just finished our basement with a wet bar and full-size refrigerator. All outlets in and around the bar are GFCI&nbsp;protected, and the refrigerator is on it&#39;s own 20A, GFCI-protected circuit. The circuit for the refrigerator&nbsp;has an&nbsp;arc fault breaker in the panel, but the inspector is telling us we need to install a GFCI/arc fault breaker combo switch for the refrigerator circuit. I cannot find where in the Code it says we must do this, nor do I understand why. Can somebody please explain this to me? Thanks!</p> </div> http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/refrigerator-breaker-question#comments National Electrical Code (NEC) Mon, 26 Sep 2016 20:10:49 +0000 140471 at http://ecmweb.com Min Switch Height? http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/min-switch-height <div class="node-body forum-body"><p>I was wondering if there was a minimum height regulation for a&nbsp;<span>2-</span><span>way keyed&nbsp;switch</span><span>?&nbsp;Can they be mounted low to the ground?</span></p> <p>&nbsp;</p> </div> http://ecmweb.com/forums/electrical-101/national-electrical-code-nec/min-switch-height#comments National Electrical Code (NEC) Fri, 16 Sep 2016 18:49:59 +0000 140051 at http://ecmweb.com