I would recommend you use AWG # 2 copper or AWG # 1/0 aluminum for that distance and amperage.
You do not use a ground wire in the connection from the meter base to the distribution panel. A bonding wire may be required if the service is using PVC conduit.
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.
six awg
6 AWG
Service wire for 100 amps requires AWG #3 copper.
Service wire required is AWG # 3/0 copper.
A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.
#10 wire is used on a 30 amp service.
Approximate overall diameter of the wire is 12.8 mm. If you are looking for metric wire size 95 mm2. 187500 circular mils.
You do not use a ground wire in the connection from the meter base to the distribution panel. A bonding wire may be required if the service is using PVC conduit.
You size it by the current required by the secondary, and the primary will be smaller wire.
Wire sizes are governed by the amperage the wire is to carry. To answer this question the load current is required.
A 100 amp residential service requires a size #8 copper wire, it should be insulated in green.
A #3 copper wire with an insulation factor of 75 and 90 degrees C is rated at 100 and 105 amps respectively.
# 6 copper wire.
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