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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How much do you really know about SPD’s? What is their purpose? Ho…
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2.3K views · 52 reactions | 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 | Facebook
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2.3K views · 52 reactions | In this video, NEC expert Mike Holt explai…
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1.7K views · 98 reactions | This new section requiring the installation of a surge-protective device (SPD) for all dwelling unit services has been a long time coming. Up until now, dwelling unit surge protection has been optional and usually an “extra” for the electrician. Section, 230.67, now requires surge protection for all dwelling unit services to protect sensitive life safety devices like smoke and CO detectors from surge damage. | Mike Holt Enterprises | Facebook
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1.7K views · 98 reactions | This new section requiring the installation o…
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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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There is no definitive answer about GFCI protection on hardwired EV …
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Lightning Protection: Five concepts you need to understand
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113K views · 1.2K reactions | Many think a ground rod provides protection against a ground fault. But that’s not true. Watch MikeHolt.com/GroundRod. | Mike Holt Enterprises | Facebook
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113K views · 1.2K reactions | Many think a ground rod provides prote…
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Starting with the 2020 NEC, GFCI protection is required for dwelling unit ranges and dryers that are cord-and-plug connected, see NEC 210.8(A). Since all ranges and dryers are shipped from the factory with an N/G bond, the GFCI breaker always trips. NEC 250.142(B) requires a 4-wire cord to ranges and dryers; separate the N/G bond at the appliance, and your problem will be solved. As for me and my House, we will serve the Lord [Joshua 24:15]. #mikeholt #electricaltraining #electrician #electrical
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