What size ground wire?
#1
10-24-15, 08:45 AM
Join Date: Oct 2015
Location: US
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What size ground wire?
I have three 12-2 NM cables pulled into my garage for 3 x 20A circuits. I would like to run THHN from a junction box and use a common ground wire for all three circuits. What gauge wire must I use from the junction box to the panel?
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#3
10-24-15, 08:58 AM
Member
Attached or unattached garage?
Trying to figure out why your not installing a small sub panel in the garage.
Trying to figure out why your not installing a small sub panel in the garage.
#4
10-24-15, 03:37 PM
Member
The answer to joecaption's question can extremely important. If the garage is not attached to your house (a separate structure), the NEC allows only one circuit. That circuit can be a feeder to a subpanel feeding multiple circuits withing the garage.
Buildings or Other Structures Supplied by a Feeder(s) or Branch Circuit(s)
225.30 Number of Supplies.
A building or other structure that is served by a branch circuit or feeder on the load side of a service disconnecting means shall be supplied by only one feeder or branch circuit unless permitted in 225.30(A) through (E). For the purpose of this section, a multiwire branch circuit shall be considered a single circuit. (NFPA-70, 2014)
Buildings or Other Structures Supplied by a Feeder(s) or Branch Circuit(s)
225.30 Number of Supplies.
A building or other structure that is served by a branch circuit or feeder on the load side of a service disconnecting means shall be supplied by only one feeder or branch circuit unless permitted in 225.30(A) through (E). For the purpose of this section, a multiwire branch circuit shall be considered a single circuit. (NFPA-70, 2014)
#9
10-25-15, 02:22 PM
Member
You still have not ansewered an important question.
Is the garage attached to the house?
If not there's a whole different set of rules.
Is the garage attached to the house?
If not there's a whole different set of rules.
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