Assuming this falls under the National Electrical Code (NEC) the size for the service ground is based on the conductor size of the Ungrounded (Hot) conductors. For 150A the size of XHHW Copper would be 1/0 for the Hot conductors and #6 AWG copper for the ground. Aluminum would be 3/0 for the Hot conductors and #4 AWG aluminum for the ground.
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∙ 13y agoWiki User
∙ 15y ago1/0 will handle 150 amps if the wire is rated 75 C, 2/0 would be safer.
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∙ 14y agoSize 1
Shammas Shaz
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∙ 11y ago#4 Copper.
Anonymous
#6
Anonymous
#6
Anonymous
#6
To calculate the wire size, a system voltage is needed.
A #14 wire will do fine for grounding a 20 amp device. That is the size of the ground wire in a 2 conductor # 12 wire building cable.
A 200 amp service panel will require a # 4 bare copper ground wire.
six awg
On a 200 amp or any size service the ground wire is easily identified. Look in the distribution panel for the neutral bus bar. This is where the service neutral (white wire) is connected to the distribution panel. There you will see a bare copper wire connected to the same neutral bar. This is the ground wire that is connected to the ground rods out side of the house.
#6 bare copper wire.
200 amp service in chicago uses 3 aught.
To calculate the wire size, a system voltage is needed.
It actually depends on the size of service entrance feeders. 1/0 copper should cover you in most cases