Mike Holt Circuit Sizing - Air-Conditioning Sizing air-conditioning circuits are really simple. Just read the nameplate and use the NEC Table 310.16 (2020 NEC) and 240.4(D) and 240.4(G), 240.6, and 440.6(B). | Mike Holt Enterprises
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Mike Holt Circuit Sizing - Air-Conditioning Sizing air-conditioni…
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To determine what size feeder is needed to carry a certain amount of current, the temperature rating of the conductor and associated terminals must be taken into consideration. Factors that impact feeder sizing include conductor ampacity, equipment terminal temperature rating, continuous load factors, overcurrent protection requirements, conductor insulation temperature rating, ambient temperature corrections, and conductor bundling adjustment. At first glance all of this may seem a bit overwhel
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To determine what size feeder is needed to carry a certain amount …
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Sizing wire and protection for AC equipment is based on the nameplate. Yes 10 AWG on 40A breaker is correct. Watch MikeHolt.com/AC to understand why! I bet the Electrosaurs will have heart-burn… | Mike Holt Enterprises
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Sizing wire and protection for AC equipment is based on the namepl…
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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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The first time you’re called upon to size a conductor and overcurrent …
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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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Factors that impact conductor sizing include not only conductor ampacity and equipment terminal temperature rating, but also the conductor insulation temperature rating. In this video we discuss Table 310.4(A) which provides information on conductor insulation properties such as letter type, maximum operating temperature, application, insulation, and outer cover properties… | Mike Holt Enterprises
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Factors that impact conductor sizing include not only conductor …
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Code video 440.4 Marking on Hermetic Motor Compressors and Equipment Want to know how easy it is to size the conductor and breaker or fuse for hermetic motor compressor equipment? It’s simple, just follow the equipment manufacturer’s nameplate ratings for sizing the minimum conductor and maximum overcurrent protection sizes as explained in the National Electrical Code section 440.4. Ever heard that guy who says, “you can’t protect that 10 AWG with a 50A circuit breaker.” Don’t be “that guy”! Wat
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Code video 440.4 Marking on Hermetic Motor Compressors and …
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When more than three current-carrying conductors are bundled (…
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A fire pump wouldn’t be of much use during a fire if the circuit cond…
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The circuit equipment grounding conductor is sized in accordance …
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The NEC does not require a connector for the Grounding Elect…
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Mike Holt Enterprises on Instagram: "Sizing conductors and short-circ…
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Mike Holt Enterprises on Instagram: "Motor Conductor and Short-Circu…
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