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#2 aluminum for 100 amp

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Q: What size aluminum ser cable needed for 100 amp sub panel?
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What size service cable for 100 amp main panel 100 feet away?

20Sqmm


What size service cable would you need for a 200 amp service?

2/0 AWG in copper and 4/0 AWG in Aluminum or copper clad aluminum.


Thank you Is it possible to do the wiring in aluminum or is that old school?

Today the only use of aluminum wire is in service entrances and underground feeds where the larger sizes are needed. By using aluminum the overall project wire costs are kept to a minimum even with the bigger size needed over copper. Wiring branch circuit in aluminum has not been vogue for many years now.


What size pipe and size aluminum wire are required for a 100A sub panel off a 200A main service?

A #1 aluminum wire with a insulation factor of 90 degrees C is rated at 105 amps. Three #1 wires can be installed into an 1 1/2" conduit.


What wire size for 100 amp sub panel 250 ft from main panel?

1/0 copper thhn covering. 3/0 aluminum again thhn covering