A #3 copper conductor with an insulation rating of 75 or 90 degrees C is rated at 100 and 105 amps respectively.
4 AWG
A 100 amp residential service requires a size #8 copper wire, it should be insulated in green.
2 copper
A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.
A #3 copper wire with an insulation factor of 75 and 90 degrees C is rated at 100 and 105 amps respectively.
# 4 copper wire short distance.
A 100 amp residential service requires a size #8 copper wire, it should be insulated in green.
Service wire for 100 amps requires AWG #3 copper.
2 copper
A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.
AWG 4 copper.
A #3 copper wire with an insulation factor of 75 and 90 degrees C is rated at 100 and 105 amps respectively.
Assuming its copper. Number #3 or #2 is fine
# 4 copper wire short distance.
I would recommend you use AWG # 2 copper or AWG # 1/0 aluminum for that distance and amperage.
The wire that is used for connecting the ground rod or plate to the electrical distribution is governed by the size of the electriclal distribution. In Canada a #6 bare copper is the minimum size for a 200 amp service.
#8 is the size of wire to use for grounding a 100 Amp panel. Green is color used for grounding #8 is code.
A #3 copper wire with an insulation rating of 75 or 90 degrees C is rated at 100 and 110 amps consecutively.