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Electrical Wire and Cable

Planning for a Garage Electrical Sub Panel

By Dave Rongey - Summary:

How Can I Install Electrical Wiring and a Sub Panel in a Garage? Planning and Installing a Garage Sub Panel.

Wiring a Garage Panel

Electrical Question How Can I Install Electrical Wiring and a Sub Panel in a Garage?

This electrical question came from: Mike, a Homeowner from Stillwater, Minnesota.

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

Garage Electric Panel Installation

Application: Adding a Sub Panel to a Garage.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrical Contractor, Not Recommended for Homeowners.
Tools Required: Electricians tools, 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 garage electrical wiring and a garage sub-panel should be done according to local and national electrical codes with a permit and be inspected.

Planning and Installing a Garage Sub Panel

  1. What is the available load capacity of the main electrical system panel.
  2. How much additional load will be placed on the proposed garage sub-panel

Understanding the available capacity of the main electrical system panel and comparing this to the amount of load you wish to add with the garage sub panel will tell give you an indication about your proposed project, and if you need to consider upgrading the main electrical panel.

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