The time it takes for the overcurrent device to trip depends on a number of factors, one of which is the “time-current-curve characteristic” (TCC) of the specific overcurrent protective device. Download a FREE PDF of this section as you join Mike and the team explain this topic in detail. Click the link below. 🔗https://www.MikeHolt.com/newsletters.php?action=display&letterID=2710 For more information on this topic, get a copy of Mike Holt's Understanding Electrical Theory video program and text
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The time it takes for the overcurrent device to trip depends on a numb…
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Selective coordination is when overcurrent protective devices are designed to clear a short circuit or ground fault in a manner that localizes the short circuit or ground fault to that given circuit. Download a FREE PDF of this section as you join Mike and the team explain this topic in detail. Click the link below. 🔗www.MikeHolt.com/newsletters.php?action=display&letterID=2722 Want to learn more about this topic? Mike's Understanding Electrical Theory video program is a great tool to learn fun
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The circuit equipment grounding conductor is sized in accordance with NEC Table 250.122, base on the rating of the circuit overcurrent protection device. For example, the EGC for a 100A feeder would need to be 8 AWG copper or larger. | Mike Holt Enterprises
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The first time you’re called upon to size a conductor and overcurrent device for central air-conditioning and you look at the nameplate requirements that clearly state that a 10 AWG copper conductor and a 50A OCPD are required, it may contradict everything you’ve learned about small conductors. In fact, you may adamantly insist that 6 AWG is required by the Code and you’d be wrong! Learn why in this video on section 440.4(B) of the NEC... https://www.mikeholt.com/newsletters.php?action=display&l
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