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In normal house wiring, the neutral is bonded to the box where the main disconnect is located and a ground conductor runs from the neutral bar to the ground rods. (as in 2 ground rods, 10' apart.) The neutral and ground never come in conatact again. However, when a sub-panel is power in a different building, you can run a three-wire curcuit and bond the nuetral in the sub-panel and run a ground conductor from the neutal bar to ground rods driven at the building where the sub=panel is located. BTW: Never use smaler than #6 copper for a gound conductor. Number * is legal for a 100 amp service, but it requires mechanical protection (conduit), where as #6 does not require protection.

Electrical Ground Question
Home Improvement
Replies 16 Post by Iowachild