![]() ![]() Aluminum wires are lighter than copper but still provide 61 conductivity. ![]() Somebody told me that 6/3 Romex is only rated up to 55 amps BEFORE derating factors. The proper size of wire for a 60-amp circuit is six to six AWG (American Wire Gauge).60 Amp Breaker 6 Gauge Wire, Copper wires are the most common, but aluminum wires are available, too. Therefore, the wire size for 60 amp 220v, for example, is still 6 to 4 AWG. All household wires have a rating of at least 600V, so only amperage really matters when it comes to determining wire gauge. The guy in that department said that I was "supposed" to use cable consistent with that rating even though I plan to feed the panel with a 50 (or 60) Amp circuit. The 6/3 Romex is hooked up to a 60amp breaker. For 60 ampere breakers, electricians and professionals suggest using a wire size gauge ranging from 6 AWG to 4 AWG. That’s because if we factor in the 80 rule and the 30 voltage drop, such a setup will require a wire that can handle 97.5A in reality. Oh, BTW, in Lowes today, I purchased a subpanel with a 125 amp rating. The calculator allows entry of a voltage drop, but caution should be used when doing so. 3 AWG copper wire is the 60 amp sub panel wire size if the main’s 150 feet away and assuming the voltage drop reaches as high as 30. I have a number of very good books on the subjecdt, but none address this issue beyond stating that I should use SER cable to feed subpanels at or above 100A and NM-B 6-3 for a 50 Amp. An example would be: A 12 volt heater, pulling 40 Amps, using a 10 gauge wire, could be ran a maximum of 2.8 feet. Each looks like the electrician used 6-2 cable for the circuit although I can't find any writing on the sheath that I can tell for sure. For 60-amp electrical service, 6-gauge copper or aluminum wire is the correct size to power such devices as electric furnaces and large electric heaters. Yet I have a furnace with two backup strip heaters on 60 Amp circuit breakers. I may want to expand to a 240V circuit for a 3HP table saw at some point as well, and perhaps add an air compressor.Īnyway, a 50 Amp circuit will probably be enough and I know that I should use 6-3 w/G to feed the subpanel and isolate the neutral bus bar from the ground bus bar in the subpanel.īut if I choose to go with a 60 Amp subpanel feed instead, what size wire do I use? I know 6 AWG is good to 55 Amps. I will have a 2HP Dust Collection system on a dedicated circuit, lighting on a dedicated circuit, and two 20 amp receptacle circuits for now. ![]()
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