A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.
Approximate overall diameter of the wire is 12.8 mm. If you are looking for metric wire size 95 mm2. 187500 circular mils.
A #3 copper wire with an insulation factor of 75 and 90 degrees C is rated at 100 and 105 amps respectively.
Depends on length. The more length, the more resistance.
# 4 copper wire short distance.
Wire size is governed by amperage not voltage. Voltage is an insulation factor when talking about wire. Add up the amperage of fixtures you want in the circuit. Once that is found then the size of the wire can be calculated.
Approximate overall diameter of the wire is 12.8 mm. If you are looking for metric wire size 95 mm2. 187500 circular mils.
A #3 copper wire with an insulation factor of 75 and 90 degrees C is rated at 100 and 105 amps respectively.
For a 20 amp, 220V circuit over a 100 ft distance, you would ideally use a 10 gauge wire to minimize voltage drop and ensure safety. A 10 gauge wire can safely handle 20 amps of current and is appropriate for this application.
You size it by the current required by the secondary, and the primary will be smaller wire.
Depends on length. The more length, the more resistance.
I would recommend you use AWG # 2 copper or AWG # 1/0 aluminum for that distance and amperage.
Service wire required is AWG # 3/0 copper.
# 4 copper wire short distance.
This is a voltage drop question. A voltage needs to be stated to answer this question.
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A 100 amp residential service requires a size #8 copper wire, it should be insulated in green.