The current (amp) capability is determined by the wire size in gauge, rather than the voltage rating stamped on the insulation.
The most basic rating is 20 Amps for 12 gauge and 15 Amps for 14 gauge wire; however, it can get more complex than that for long runs of wire or for wires run through conduit with other wires. Hire an electrician if this sounds bewildering.
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The amp capability of a 600 volt wire depends on its gauge or thickness. For example, a 12-gauge wire can typically handle around 20 amps, while a 10-gauge wire can handle around 30 amps. It is important to consult the wire's specifications or a professional electrician to determine the specific ampacity for your application.
No !
The main difference is their voltage ratings. The 30 amp 250 volt rating is suitable for lower voltage applications, while the 30 amp 600 volt rating is suitable for higher voltage applications. It's important to use the correct voltage rating to ensure safety and proper functioning of electrical equipment.
Yes, no problem at all going to a larger ampacity of wire. Larger size wire yes, smaller size wire no.
With thick wires that have excellent insulation.
AWG # 10 wire on 30 amp circuit.