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Daisy chain fluorescent fixture

7K views 28 replies 8 participants last post by  Jim Port 
#1 ·
Can I use NMD90(either with or without jacket) internally to connect fluorescent fixtures using the housing as a junction box? These fixtures say its ok to use them like this but dont state wire type. It may rest against the ballast.
 
#3 ·
Can I use NMD90(either with or without jacket) internally to connect fluorescent fixtures using the housing as a junction box? These fixtures say its ok to use them like this but do not state wire type. It may rest against the ballast.
I do not know about the R90, due to that is mainly used for cords, if you are connecting them to junction boxes, or using a plug on the end. I have mine daisy chained in two groups, with 14/2 NM going from the switches to the first fixture, then from the first fixture to the second on each group. They were done this way, since they are permanent mounted fixtures, not just swinging in the breeze with chains.
 
#6 ·
Read what I stated. To repeat again, my setup goes from the switches to the first fixture, then out of the first fixture, to the second fixture.

I said nothing about running the Romex through one side of the fixture out the other as a continuous line. If I did, there would be no interconnection for power, so the fixture would actually never be able to turn on or off if you just ran it through.

The fixture is the junction box in my setup, due to they are permanently fixed in place, not swinging in the breeze.

We have discussed this on here before. http://www.diychatroom.com/f18/ceiling-junction-box-fluorescent-light-70699/ Another thread that we discussed this before http://www.diychatroom.com/f18/fluorescent-light-junction-box-123341/
 
#8 ·
Again, what did I state, and what do the two links state? Is it that hard to understand that you can use NM Romex into and out of a fixture, to connect them? Also how do you think that the wires inside the Romex get attached to the wires inside the fixture, without physically having the wire in the Romex attached to them.

Re-read what I posted, and the two links. This is a cut and dry issue, there is no in between.
 
#10 ·
I already read those two links and they are not discussing what I'm trying to accomplish. I bought fixtures that can be physically connected together to make multiple fixtures one big ass fixture. You then need to connect the wires together.

You can either run romex in and out of each OR you install bushings between the fixtures to run wire internally. What wire can be run between them is the question. Code book says no romex.
 
#12 ·
Read further through that, you will better understand why they are stating to use R90 inside the fixture, to interconnect the ballasts, when you bond the two into one long fixture, by using the bonding nut.

You are only reading the top part, and nothing else. And as for those two links and what I stated, yes we are on the same page, you are just not looking at it, how the book you have in front of you, and what I and the two links state.

To make it simple, you pull Romex or AC to the nut on the top or side of the fixture, have a 12" to 18" length of the wires that are inside the Romex or AC connect to the Ballast of the fixture. Same goes for the run that exits the fixture to the next row or section.

As for the R90, it is to as I stated before, interconnect the two ballasts inside. Usually all that is used most of the time, is THHN/THWN inside between the ballasts, not R90. The only reason they are stating to use stranded wire between the ballasts, is because it will flex a little.
 
#13 ·
I'm glad you have the same book in front of you which magically has more information :laughing: Really. The book states what I snapped in that picture.

The links you posted say you can use the fixture as a junction box which I already knew.

I was looking to find out what type of cable/individual conductor I can use to interconnect the devices to avoid looping back out. Turns out it has to be 90C, 600V so R90, RW90, and T90. Romex is out.

Over and out.
 
#14 ·
Did I not state that above post #13. You are the one not getting it, not me. BTW, read the rest of the paragraph in the book you have in front of you, it explains the purpose why you use stranded wire in that setup, or in some cases like I stated, THHN/THWN is used between the ballasts.
 
#15 ·
The only reason they are stating to use stranded wire between the ballasts, is because it will flex a little.
The reason you cannot use romex between the ballasts is not because of flexibility, it is because of temperature rating.
 
#17 ·
There is no markings on the wire. So unless there is something in it's listing, you wouldn't be able to use it.
 
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