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A 200 amp requires a wire size of 250 kcmil. *Data provided on this page is subject to change based on different manufacturers variances. In general, the appropriate sizes of wires per amp are the following: A 150 amp circuit requires a 1/0-size copper wire. Gray, sunlight-resistant PVC (polyvinyl chloride) jacket over the complete assembly For 125 amps, youll need to use a 1-gauge copper wire, while 150 amp. White PVC (polyvinyl chloride), rated 90☌ Jacketed with white nylon (polyamide) You need a 4-gauge copper wire for an 80 amp, and a 1-gauge wire for a 100 amp service. In 2007, the transport became the fifth aircraft to mark 50 years of continuous service with its original primary customer, which for the C-130 is the United. The divisions on the scale of my metal ruler each represent 1 mm. Above is a close-up photo of a 14 copper wire against a millimeter scale. Type THHN conductors Black PVC (polyvinyl chloride), rated to 90☌ in wet or dry locations Jacketed with black nylon (polyamide) One phase conductor has a red stripe on its insulation surface for easy polarity identification. Branch circuit electrical wire sizes such as the 14 copper electrical wire shown just below are included in the tables on this page where we give wire sizes for circuits from 15A to 50A. Im suggesting 350/350/350 as its a long run and I dont think derating the nuteral is worth the few bucks of cost saving. 4 AWG copper wires should be used for a standard 220V circuit at 150 feet. Now, look at the wire size chart again, and you’ll see that the ideal copper wire size to use is, indeed, 4 AWG, which is rated for 70A.

Factoring in the 30 amp increase, we get the following equation: 50A x 1.3 65A. The client has a buddy that is a master electrician and is telling him to run 250/250/ (4/0). Wire Size and Materials for a 50-Amp Circuit. Stranded conductors: Uncoated copper per ASTM-B3, ASTM-B8, and ASTM-B787 My calculations show 350 mcm Al for 3.46 vd. Type SE, Style SER Service Entrance may be used as service-entrance conductors and in other applications where SE cables are permitted when installed as specified by NEC® dry locations at temperatures up to 90☌. Enter the desired footage in the QTY box.