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Electrical Wire and Cable

How to Install a Sub Panel for an Attached Garage

By Dave Rongey - Summary:

Planning and Installing a Garage Sub Panel: I want to add a panel to my attached garage, what size breaker do I need?

Sub Panel in an Attached Garage

Electrical Question: I want to add a panel to my attached garage, what size breaker do I need?

I plan on #10 to feed the heater from the sub, #12 to feed any 20 amp circuits from the sub and the 2 15’s I’ll be switching to the sub are currently 14-2 NMB. Am I missing anything? I’ve wired simple circuits from the main before but this will be new for me. I have some knowledge of electrical circuits as my father was an electrician but he is now disabled from a severe stroke and find myself in need of help to make sure I’m not doing anything that would compromise my family’s safety.

This electrical question came from: Vince, a Homeowner from Longmont, Colorado.

Additional Comments: This is a great site for safe wiring advice.

Dave’s Reply:
Thanks for your electrical question Vince.

Installing a Garage  Sub Panel

Application: Adding a Sub Panel.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrical Contractor, Not Recommended for Homeowners.
Tools Required: Electricians pouch of hand tools and the various power tools necessary for installing the sub-panel.
Estimated Time: Depends on the type and size of the panel and available access to the project area.
Precaution: Any existing electrical wiring within the immediate area that may interfere with the installation of the sub panel should be identified and turned OFF and Tagged if necessary. Working in an electric panel is dangerous due to arc flash hazards and the possibility of electric shock.
Notice: Installing additional electrical wiring and a sub-panel should be done according to local and national electrical codes with a permit and be inspected.

Planning a Garage  Sub Panel

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MORE ABOUT THIS TOPIC: Electrical, Electrical Wiring, Garage Electrical Wiring, Panel Wiring

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