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Old 12-22-2013, 03:05 PM   #1
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Metallic to Electronic Ballast Conversion Wiring


My current light fixtures have two metallic ballasts. There are two separate wires coming into the fixture with each wire supplying a hot and neutral to each ballast. The grounds were connected together with the ground on the fixture. I want to replace these ballasts with one electronic 4 lamp ballast. There is only one white and one black wire on the ballast.

What do I do with the two house wires? Connect all 3 blacks and all 3 whites or cap off one of each and just use one house wire. Are there two house wires because all of the strip lighting fixtures are connected together?

Hopefully I have supplied enough information. I have diagrams if needed.

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Old 12-22-2013, 04:26 PM   #2
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Metallic to Electronic Ballast Conversion Wiring


Are these current MAGNETIC ballast controlled by one switch or two switches? If one switch I would just cap the extra set with two wire nuts and use one set for your new ballast.

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Old 12-22-2013, 05:19 PM   #3
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Metallic to Electronic Ballast Conversion Wiring


All of the fixtures are controlled by one breaker switch and multiple wall switches.
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Old 12-22-2013, 05:22 PM   #4
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Metallic to Electronic Ballast Conversion Wiring


Is this a commercial property?
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Old 12-22-2013, 05:50 PM   #5
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No, residential.
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Old 12-22-2013, 05:53 PM   #6
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Metallic to Electronic Ballast Conversion Wiring


If you want the fixture to be switched as it was, you will need to use two two lamp ballasts.
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Old 12-22-2013, 07:13 PM   #7
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Metallic to Electronic Ballast Conversion Wiring


Ok. So using a 4 lamp ballast, it might on all the time without operation from a switch?
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Old 12-22-2013, 09:29 PM   #8
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Metallic to Electronic Ballast Conversion Wiring


Did one or two switches control this fixture?
If one switch I would just cap the extra set with two wire nuts and use one set for your new ballast.
If two switches then you need two ballasts if you want it the same.
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Old 12-22-2013, 11:33 PM   #9
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Metallic to Electronic Ballast Conversion Wiring


There are 6 fixtures with 2 ballasts each. They are all 4-lamp fixtures so 12 ballasts total. There are 8 ballasts in one room operated by 3 switches and 4 ballasts in another room operated with 1 switch. All ballasts are on the same breaker switch.
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Old 12-23-2013, 05:49 AM   #10
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Metallic to Electronic Ballast Conversion Wiring


Hopefully you are also converting from T12 to T8 lamps
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Old 12-23-2013, 07:07 AM   #11
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Yes, I am going from T12 to T8.
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Old 12-23-2013, 07:34 AM   #12
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Metallic to Electronic Ballast Conversion Wiring


You still have not answered if the two ballasts are operated by separate switches. That would seem logical since there would be no other reason to have two feeds into a fixture.
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Last edited by joed; 12-23-2013 at 01:08 PM.
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Old 12-23-2013, 08:07 AM   #13
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Metallic to Electronic Ballast Conversion Wiring


Joed here is my answer about the switches.

Quote:
Originally Posted by Brewer12 View Post
There are 6 fixtures with 2 ballasts each. They are all 4-lamp fixtures so 12 ballasts total. There are 8 ballasts in one room operated by 3 switches and 4 ballasts in another room operated with 1 switch. All ballasts are on the same breaker switch.
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Old 12-23-2013, 01:09 PM   #14
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Metallic to Electronic Ballast Conversion Wiring


8 ballasts operated by 3 fixtures does not tell if both ballasts in one light are operated by one switch.
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Old 12-23-2013, 04:25 PM   #15
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Metallic to Electronic Ballast Conversion Wiring


Joed,

My apologies.

There are 4 fixtures from left to right. The left switch operates both ballasts in the left fixture. The middle switch operates one ballast on each of the other three fixtures and the same for the right switch.

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