surface mounted fluorescents

[bennie]

Re: surface mounted fluorescents

I will go into buildings done by Tim and Wayne

 

[russellroberts]

Re: surface mounted fluorescents

If we know the fixture will be parellel to the ceiling joists, we put in 2x6 or 2x8 blocking to have something solid to fasten the fixture to.

It takes more time but I've never regretted it.

Russell

 

[frenchelectrican]

Re: surface mounted fluorescents

the other way i do is use the channel strut and lag it to the 2x4 or 2x6 joints then use the strut to support the fixures ( at the same time it give the cooling effect for ballast at the same time ) but never toggle bolt it i will stay away from that it is spooky ya never know when it will sag or ripped out

merci marc

 

[k d]

Re: surface mounted fluorescents

I asked the question because I wasn't sure if I was properly understanding the definition of "combustible low-density cellulose fiberboard". I did not ask the qestion so this could be used as a chat room for petty differences.

 

[roger]

Re: surface mounted fluorescents

Huh?

I asked the question because I wasn't sure if I was properly understanding the definition of "combustible low-density cellulose fiberboard".

that doesn't really go with the way you asked this,

when mounting a surface mount fluorescent fixture to common sheetrock, do I need to use stand-offs or can I mount directly to the sheetrock

Now as far as this,

I did not ask the qestion so this could be used as a chat room for petty differences.

we can argue and "chat" even when we are all in agreement. You must not visit this board much or you would have known this.

Roger

 

[bennie]

Re: surface mounted fluorescents

kd: All of the electricians, on this forum, can differentiate between cellulose fiberboard and sheetrock.

If everyone agreed with me, I would cancel my ISP and play solitaire with my computer.

This topic, as described in the original post, does not deserve the time of the learned individuals on this board.

You signed in to this forum some time ago. That was a positive decision. Stay involved, we can all learn more.

 

[bennie]

Re: surface mounted fluorescents

kd: You too can become learned Type in "cellulose fibre" and then "sheetrock" into your search engine. There is 2167 pages on cellulose fibre, and 3454 pages on sheetrock.

There is even an article on cutting sheetrock.

 

[k d]

Re: surface mounted fluorescents

In other words, Bennie, you can't give me an example.

 

[tim]

Re: surface mounted fluorescents

Be nice KD :roll:

 

[rich000]

Re: surface mounted fluorescents

Straying from the subjuect a bit:

A lot of installations of flourescent lights are being done without a box. The cable comes in through the sheetrock and right into the light.

Does anyone else agree with this?

 

[bennie]

Re: surface mounted fluorescents

If you install a box on top of the fixture it is necessary to cut a large hole in the fixture to get access to the box.

 

[tim]

Re: surface mounted fluorescents

I'm with Bennie, if possible, when running romex, using the fixture as a junction box is the way to go.

 

[tim]

Re: surface mounted fluorescents

One more thought on the topic though, what's the difference between a flouresnce fixture and an incandecent fixture as a junction box is concerned?

 

[russellroberts]

Re: surface mounted fluorescents

If you put a box above a fluorescent fixture is the box then rendered inaccessible?

 

[bennie]

Re: surface mounted fluorescents

Tim: An incandescent fixture is hot everwhere. A flourescent fixture is only hot around the ballast.

 

[iwire]

Re: surface mounted fluorescents

Bennie you will love this, I got a service call the other day and it was for a light that fell.

I got there and found a 1' x 4' surface fluorescent hanging by the NM Cable.(Where you in RI )

It had been supported by two 1/4" toggles right on a seem.

Another trade had been crawling around above the fixture and had pushed down on the sheetrock causing the sheetrock to let go.

I did use toggles to put it back up although this time it was 2 toggles at each end right through the sheetrock and the metal studs that made up the ceiling. I did this so I could pull the sheetrock back tight to the studs.

I do have screws that will shoot through both the fixture and the metal studs but often the fixture is heavier gauge metal than the metal studs or metal strapping. Even with a #10 screw the guys often over tighten and strip out the stud.

 

[pierre]

Re: surface mounted fluorescents

Just something to remember

If you install a flourescent fixture flush to the surface and there is a ceiling box, the wiring has to be accessible for inspection. 410.61(B)
That is why some flourescents come with the 'oversized' knockout. Don't forget to ground.

Pierre