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Electrical Wire and Cable

Light Switch Wiring For A Garage

By Dave Rongey - Summary:

How to Install Garage Wiring: Installing electrical wiring for a garage to provide power for receptacle outlets, lighting and switches.

Garage Wiring Project

Electrical Question: I am completely rewiring my detached garage with its own dedicated 200A service from the power company. I have installed a network of 3/4″ EMT conduit in the ceiling to run a few different circuits. Rather than install hard wired fixtures, I have decided to use plug in fluorescent fixtures. So, the “lighting” circuit is actually just a series of switched outlets.Since I am using EMT and individual 12 AWG THWN-2 wires, is it necessary to change wiring colors in the loop and relabel with tape like you would with NM/Romex wiring? I would much rather stay consist with my wire colors and just have 2 black wires at the switch rather than a black and re-marked white. Also, I understand the wattage draw limitations on lighting circuits, but will the inspector have a problem with me just installing outlets since there is no specific wattage draw? I plan to switch 6 20A duplex receptacles on a dedicated 20A breaker with a 20A light switch (again, 12 AWG wire). The actual wattage draw on the circuit in practice will be fairly low; maybe 1000Watts.

This electrical question came from Randy, a Handyman from Fort Wayne, Indiana.

Dave’s Reply:
Thanks for your electrical wiring question Randy.

How to Install Garage Wiring for Light Fixtures and Switches

Application: Garage Wiring for 120 volt circuits.
Skill Level: Intermediate to Advanced – Best installed by a Licensed Electrical Contractor or Certified Electrician.
Tools Required: Electricians Pouch of Hand Tools for Rough-In Wiring, Electric Drill and Auger Bits and Extension Cord.
Estimated Time: Depends on the extent of the project, the type of construction and available access to the project area.
Precaution: Any existing wiring in the immediate area that may interfere with the installation should be identified and turned OFF and Tagged.
Notice: Installing additional electrical wiring should be done according to local and national electrical codes with a permit and be inspected.

Installing electrical wiring for a garage to provide power for receptacle outlets, lighting and switches.

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2 Responses to “Light Switch Wiring For A Garage”
  1. Dave Rongey says:

    Hi Roger,
    This would depend on your location and the locally adopted and enforced energy codes which are typically enforced when building a new home or remodeling an existing home. Typically the garage light is not required to be controlled by a motion detector or an occupancy sensor, however I have wired an equipment room area that was part of a garage where an occupancy sensor was required according to a California Energy Code.

  2. ROGER says: