The Mike Holt Podcast

110.26 Working Space about Electrical Equipment – https://www. MikeHolt.com/code. Clearances and working space around electrical equipment are necessary to provide a safe working environment for electrical professionals. The rules that are in place to ensure this space is available are often misunderstood. Be sure you understand these requirements as we discuss Part II of Article 110 in the NEC; m...

According to 110.3(B) in the NEC, equipment, including conductors, must be installed in accordance with the manufacturer’s instructions. But what about when the length of these conductors creates a voltage drop? Is voltage drop just a recommendation in the NEC and not really enforceable? Find out in this podcast where we discuss the ramifications of voltage drop in branch circuit and the energy an...

406.12 Tamper-Resistant Receptacles - https://www. MikeHolt.com/code. The locations where tamper-resistant receptacles are required have been greatly expanded in 406.12 to include all education facilities, areas where people are awaiting transportation, dormitory units, and assisted living facilities.

312.8 Splices in Panel Enclosures – https://www. MikeHolt.com/code. When it comes to electrical enclosures, “As long as we can get the cover on, we’re good.” is the mindset of many. The NEC has requirements for fill or how much space inside an enclosure is available for wiring and electrical devices as you’ll see when you listen to this podcast on section 312.8.

The 2020 Code cycle brought many changes to Article 690, Solar Photovoltaic (PV) Systems. Some of the more notable changes were in section 690.12 for "Rapid Shutdown" and are discussed in this podcast.

Do you know how a Grounding Electrode System works? What about grounding for PV Systems? Is a grounding system even required? The answers to these questions and more can be found in this podcast.

Bonding and Grounding of PV Equipment is a requirement in Section 690.43 of the NEC and references sections in Article 250. Find out how to ground the equipment and why it needs to be done!

If you've pulled wire into a raceway, you understand the reason to have limits on the wire fill for raceways. In this podcast, we’ll discuss the most common condition, where multiple conductors of the same size are installed together in a raceway and the maximum number of conductors permitted can be determined from the tables in Annex C.

230.67 Service Equipment Surge Protection - https://www.mikeholt.com/code. 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 t...

230.71 Service Disconnects, Six Maximum – https://www. MikeHolt.com/code. When it comes to service disconnects, the rule of six movements of the hand is pretty well established but, can there ever be more than six? Just how does the NEC define a “service” and does this definition allow for more than six service disconnects? In this podcast on section 230.71, we discuss the requirements regarding t...

230.71 Service Disconnecting Means - https://www. MikeHolt.com/code. Although the rule of six grouped service disconnects didn’t change, disconnects are now required to be compartmentalized to reduce the hazards associated with arc-flash and arc-blast. This might not seem like a big change but, it makes most of the available multi-meter centers and switch boards ineligible for use to meet these re...