There are 37 items in this page
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Hazardous Classified Locations, NEC 2020 – [500.5]
Hazardous Classified Locations, NEC 2020 – [500.5]
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Marina Ground Fault Protection, NEC 2020 – [555.35]
Marina Ground Fault Protection, NEC 2020 – [555.35]
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Dishwasher and Disposal on same circuit? NEC 210.23 says…probably.
This videos covers one of the trickier sections of the NEC: Section 210.23. It answers the question of whether a dishwasher and dispo...
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2023 240.11 Selective Coordination
General requirements for selectively coordinated systems were added. Kind of a big deal if you’re a designer.
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2023 240.6 Standard Ampere Ratings
Ten ampere circuit breakers are now considered standard, and cybersecurity concerns are discussed.
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2023 240.4 Protection of Conductors
Adjustable trip circuit breakers were clarified, 10A circuits with 14 AWG copper-clad aluminum conductors are addressed, and dwelling...
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2023 230.85 Emergency Disconnect
The requirements for an exterior emergency disconnect at one- and two-family dwellings were clarified.
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2023 230.71 Maximum Number of Service Disconnects
One of the biggest changes in the 2020 NEC was 230.71(B). Some of the issues that it created were clarified and fixed in this edition...
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2023 230.67 Surge Protection
Similar to the changes in 215.18, surge protection requirements were added for services supplying various occupancies.
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2023 220.70 Energy Management Systems (EMSs)
Energy management systems will almost certainly be the way of the future. Article 220 has acknowledged this in a surprising way in 22...
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2023 220.57 Electric Vehicle Supply Equipment
What is the required load calculation for electric vehicle supply equipment? This new section tells us.
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2023 220.53 Appliances in Dwelling Units
Electric vehicle supply equipment is not allowed to be considered in the 75% demand factor for appliances in dwelling units.
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2023 220.5 Calculations
How is floor area calculated? Do garages count? What about crawl spaces? Attics? Unfinished basements?
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2023 215.18 Surge Protection
One of the biggest changes in the 2023 NEC has to be this one. Surge protection is now required for feeder supplied equipment in seve...
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2023 215.15 Barriers
Barriers are now required for some equipment supplied by feeder taps or transformer secondary conductors.