How much do you really know about SPD’s? What is their purpose? How do they accomplish this purpose? How many might be required and where in the electrical system are they to be located? Do you need to install a Type 1 SPD, or Type 2, 3, or 4 and what defines these various “Types?” Discover the answers to all of these questions and more in this video on Article 242, where Mike and an expert panel breakdown everything you need to know about “Surge Protective Devices (SPDs)” and the theory behind
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In this video, NEC expert Mike Holt explains how to properly ground a corner grounded delta system and the special characteristics of these rare systems… | Mike Holt Enterprises
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If you ever needed proof that the future has truly arrived you need look no further than the National Electrical Code and Article 625–Electric Vehicle Power Transfer System. Learn more about this bidirectional power supply that may be parked in your driveway or garage by watching the video where Mike and a team of experts explain what NEC Article 625 is all about. To follow along with this video, you can download the FREE PDF from our newsletter on this topic. Click the link below. 🔗 https://ww
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There is no definitive answer about GFCI protection on hardwired EV chargers outside dwelling units. The decision will have to be made by the inspector. See 90.4, 110.3(B), 210.8(F), and 625.54. | Mike Holt Enterprises
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When burying wiring we need to have sufficient ‘cover’ in accordance with NEC Table 300.5(A). In this case it’s at least 20 inches, not 18! | Mike Holt Enterprises
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Authority Having Jurisdiction (AHJ). Clearly many in the industry have no clue that an inspector cannot make up their own rules. See 90.4 | Mike Holt Enterprises
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