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Depends on the utility jurisdiction. In general, 2/2/2/4 aluminum seu will suffice for out buildings. Check with your local building code department.

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A #3 copper conductor with a insulation factor of 75 or 90 degrees C is rated at 100 and 105 amps respectively.

A #4 aluminium conductor with a insulation factor of 75 or 90 degrees C is rated at 100 and 105 amps respectively.

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12y ago
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13y ago

A table in the electrical code book states what size cable or wire is allowed to carry a specific amperage. A #3 wire wire with an insulation rating of 75 or 90 degrees C is rated at 100 and 105 amps respectively. A #2 wire wire with an insulation rating of 60, 75 or 90 degrees C is rated at 100 ,115 and 120 amps respectively.

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14y ago

# 2 alum.

#3 RW90 copper wire rated at 105 amps.

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11y ago

A #3 copper wire with an insulation rating of 75 or 90 degrees C is rated at 100 and 110 amps respectively.

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12y ago

3 AWG in copper and 2 AWG in aluminum.

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Q: How do you calculate wire size needed for a 100 amp load?
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