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Magnetic Ballast and Electronic Ballast on the Same Circuit

Replacing Magnetic Ballasts with Electronic Ballasts: Upgrading a Lighting Circuit and Installing Electronic Ballasts.

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Guide to Residential Electrical Wiring guide to electrical wiring

Upgrading a Lighting Circuit and Installing Electronic Ballasts
Electrical Question: I have a commercial building with fluorescent lighting.

This electrical question came from: Bill , a Property Manager from Louisville, Kentucky.

Additional Comments: Lot’s of great information.

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

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2 Responses to “Magnetic Ballast and Electronic Ballast on the Same Circuit”
  1. Keith says:

    I want to replace a T12 magnetic ballast with an electronic ballast but, I am confused as far as the wiring. The magnetic one has black and white and two yellow wires on one end and a blue and red on the other and the electronic has only black and white on one end and one red and two blues on the other. Must I completely rewire the lighting?

    • Dave Rongey says:

      Hi Keith,
      Replacing a Light Fixture Magnetic Ballast with an Electronic Ballast

      • When replacing a magnetic ballast with an electronic ballast the black and white power wires are connected the same as before, and the ground as well.
      • The wiring to the lamp sockets must be converted as shown on the wiring diagram on the new electronic ballast.
      • You can use any existing wires from the sockets to splice with the new wiring as needed.
      • The ballast upgrade process is just a matter of replacing the ballast and making a few wire splices.

      Enjoy your new ballast, and don’t forget to install new lamps.
      Dave

      Enjoy your new ballast, and don’t forget to install new lamps.
      Dave

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