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Old 04-28-2012, 11:13 PM   #1
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Florescent Ballast Replacement


Fixing fixture at Church. Both Ballast are bad. Current fixture has 4 lamps and 2 ballast. Wired as follows.
(SEE ATTACHMENT 1)

The replacement Ballast (T12 120-277V 2 lamp, only has 2 blue wires and 1 red (Original ballast had 2 yellow, two blue and 2 red).

Diagram with new ballast is below. My question has to do with connections. Not sure what the "DOTS" mean on the diagram. Dows this suggest I pigtail the blue wires to make 4 connections from 2 wires, or just run 1 blue to each lamp holder. Same question with the red. Does this suggest I jumper 1 red wire to 4 connections, or just run 1 red to one lamp holder then jumper to the second.
(SEE ATTACHMENT 2)
Thanks!

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Old 04-28-2012, 11:18 PM   #2
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This is attachment 2 to my earlier post
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Old 04-29-2012, 02:36 AM   #3
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Florescent Ballast Replacement


Church? well I can understand that you want to help to do the repair in the church but there is a line you can not cross unless you are licensed electrician to do this.

There is few things can go wrong if not heeded.

So my best answer is get a licensed electrician to come out and deal with that ( belive or not in larger church there is some members are electrician so they can help out if not then get one come out for it.)

The other thing the T-12 bulbs are pretty much " old school " stuff so ask the electrican to get a single ballast that can work with 4 lamp ( F32T8 verison with 4 lamp unit ) and it is a common item we do work on all the time.

Merci,
Marc
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Old 04-29-2012, 02:38 AM   #4
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See other posting I put the answer there btw that drawing that look like instat start verison but again get electrician come out and help ya on that.

Merci,
Marc
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Old 04-29-2012, 05:41 AM   #5
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...............
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Answers based on the 2008 & 2011 NEC.

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Old 04-29-2012, 05:45 AM   #6
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The diagram you posted in the other thread is exactly how you do it.

PLEASE be sure you know EXACTLY what you are doing BEFORE doing it. Some of the worst, even dangerous, wiring I have seen was in church related buildings done by well meaning folks, but those who simply know how to make it work, not how to do it correctly and safely.
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Old 04-29-2012, 06:05 AM   #7
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Merged threads. keeps it easier for everyone.
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Old 04-29-2012, 06:07 AM   #8
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Actually, what would be easier and more cost effective would be to use just one four lamp ballast.
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Old 04-29-2012, 07:57 AM   #9
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I appreciate the concerns. I will probably do what is suggested and get someone. Right now, the ballast have been removed and the wires capped and taped.

Just for my own personal satisfaction however I would still like to understand the original question about the jumper......

Thanks
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Old 04-29-2012, 08:03 AM   #10
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You shouldn't need to "jumper" anything. Just make splices. Yes, the dots reference splices.
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Old 04-29-2012, 08:03 AM   #11
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The dots mean the wires are connected. That looks like wiring for T8 lamps where one wire goes to both terminals of the tombstone(lamp holder). Check the ballast for lamp types. You might need to switch to T8 lamps with that ballast. That is not a bad thing. T8 is the new standard. We won't even be able buy T12 ballasts in Canada within the next two years
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Old 04-29-2012, 10:29 AM   #12
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Thanks Guys. I appreciate the education. Guess it just didn't make sense to me that there were two Blue and one Red wire out of teh ballast and that there would be two blue wires going to the lamp holders on one side and only one red going to the lamp holders on the other side, when in fact what you are winding up with is 4 "Blue Connections" on one side and 4 "Red Connections" on the other side
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Old 04-29-2012, 11:48 AM   #13
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The diagram is just indicating the need for shunted tombstones(the wire connected to both sides) common with T8 Lamps

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