Grounding detached buildings
#1
02-05-04, 04:47 PM
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Location: Garrettsville, OH USA
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Grounding detached buildings
Been reading NEC in preparation for wiring improvements. Moving to a farm with various barns and outbuildings. I'm confused about how to ground the branch and/or feeder circuits to the other buildings.
I assume that if a run a feeder circuit to a subpanel in a barn, then that subpanel must have it's own grounded conductor (8' rod in earth). If I am running a branch circuit only (no subpanel) then I can run the equipment grounding conductor from main panel into the outbuildings, and do not need a grounding rod on outbuilding.
Is this correct
I assume that if a run a feeder circuit to a subpanel in a barn, then that subpanel must have it's own grounded conductor (8' rod in earth). If I am running a branch circuit only (no subpanel) then I can run the equipment grounding conductor from main panel into the outbuildings, and do not need a grounding rod on outbuilding.
Is this correct
#2
02-05-04, 05:21 PM
If you run any other type of metal like a water line or phone lines between the buildings then you need to run a 4 wire feeder including a ground. You need a ground rod no matter which type of feeder you use.
#3
02-05-04, 08:23 PM
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Joed is correct. For a sub-panel a ground rod is needed either way. A GEC, grounding electrode conductor, is run to the ground rod.
A 3-wire feeder requires the grounds be bonded in the sub-panel.
A 4-wire feeder requires them to be isolated. All a 4-wire is is a 3-wire plus an EGC, equipment grounding conductor.
A grounded conductor is commonly referred to as the neutral.
A 3-wire feeder requires the grounds be bonded in the sub-panel.
A 4-wire feeder requires them to be isolated. All a 4-wire is is a 3-wire plus an EGC, equipment grounding conductor.
A grounded conductor is commonly referred to as the neutral.
