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Old 02-15-2010, 01:22 PM   #1
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Default Fluorescent Fixture Wiring From Outlet Box

While reading through Article 410 I was suprised to read the following rule:


410.24 Connection of Electric-Discharge Luminaire.
(A) Independent of the Outlet Box. Electric-discharge luminaires supported independently of the outlet box shall be connected to the branch circuit through metal raceway, nonmetallic raceway, Type MC cable, Type AC cable, Type MI cable, nonmetallic sheathed cable, or by flexible cord as permitted in 410.62(B) or 410.62(C).


My boss always let us just knock out the big KO (3-4") on the back of fluorescent surface mount fixtures, mount the hole over the ceiling box, and bring the individual conductors down into the fixture.
Am I correct in understanding this does not meet code based on the above?
Thanks

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Old 02-15-2010, 03:22 PM   #2
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I do the same thing. It's ok as long as you can access the taps without remvoing the fixture. I think that article is more for the chain hung fixtures and the like.

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Old 02-15-2010, 03:34 PM   #3
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Default flourescent fixture

Yes, that is correct.
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Old 02-15-2010, 04:17 PM   #4
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Yeah, you guys must be right about the intent of the code, I'm just bothered that the fact of the matter is that the actual text is technicly talking about all types of fixtures, including surface mounted.
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Old 02-15-2010, 04:49 PM   #5
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Josh-
Read the Entire article section not just the first part.

410.24 (B)- Access to Boxes- Electric-Discharge Luminaires surface mounted over concealed outlet,pull or junction boxes and designed not to be supported solely by the outlet boxe shall be provided with suitable openings in the back of the luminaire to provide access to the wiring in the box

So your boss is correct in the way he tells you to do it.
Keep in mind that you must read the entire section of a code article. You can't stop when you think you have the answer. You need to read the entire code section and reference those articles that are referred to in the original code section

Last edited by manchestersparky; 02-15-2010 at 04:52 PM.
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Old 02-15-2010, 04:56 PM   #6
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Quote:
Originally Posted by manchestersparky View Post
Josh-
Read the Entire article section not just the first part.

410.24 (B)- Access to Boxes- Electric-Discharge Luminaires surface mounted over concealed outlet,pull or junction boxes and designed not to be supported solely by the outlet boxe shall be provided with suitable openings in the back of the luminaire to provide access to the wiring in the box

So your boss is correct in the way he tells you to do it.
Keep in mind that you must read the entire section of a code article. You can't stop when you think you have the answer. You need to read the entire code section and reference those articles that are referred to in the original code section
In the orignial post, is just knocking out the large KO in the back of the fixture satisfy the code as far as Approved for the Purpose?
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Old 02-15-2010, 05:13 PM   #7
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If the fixture is mounted over a junction box the large KO must be removed to allow access to the JB. Just passing the circuit conductors thru a 1/2" KO from the JB will not cut it.
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Old 02-15-2010, 05:20 PM   #8
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I used to pop the 1/2 ko out then use sheet metal cutters and expose the whole box. Most guys I knew did the above. It just makes it harder for the next guy.
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Old 02-15-2010, 07:02 PM   #9
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What I used to do was to take out the 1/2 ko then use a knockout cutter to cut a larger hole.
The hole must be large enough to allow access to all the wiring in the box behind the fixture.
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Old 02-16-2010, 02:58 AM   #10
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You guys who knock out the KO and mount it over a box, do you use a snap in bushing?

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Old 02-16-2010, 03:09 AM   #11
I saw a guy do it once.
 
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When I mount a strip light over a 3/o or 4/o box, I usually use a holesaw and cut a big hole so it is accessible. If I cheat and just use a KO (sometimes I dont have the time), I like to use a conduit connector for a smooth edge.
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Old 02-16-2010, 04:36 AM   #12
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Quote:
Originally Posted by TOOL_5150 View Post
You guys who knock out the KO and mount it over a box, do you use a snap in bushing?

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Old 02-16-2010, 06:00 AM   #13
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Quote:
Originally Posted by manchestersparky View Post
Josh-
Read the Entire article section not just the first part.

410.24 (B)- Access to Boxes- Electric-Discharge Luminaires surface mounted over concealed outlet,pull or junction boxes and designed not to be supported solely by the outlet boxe shall be provided with suitable openings in the back of the luminaire to provide access to the wiring in the box

So your boss is correct in the way he tells you to do it.
Keep in mind that you must read the entire section of a code article. You can't stop when you think you have the answer. You need to read the entire code section and reference those articles that are referred to in the original code section
These two rules are talking about two completly different things:
410.24(B) has nothing to do with the isssue of the wiring method to the fixture, it concerns one thing: allowing access to the wiring in the outlet box, it doesn't say you can go ahead and wire the fixture directly from the conductors in that outlet box.
410.24(A) does talk about the wiring to the fixture, and it only lists a couple of specific methods metal raceway, NM raceway, MC, AC, MI, NM, or flexible cord. It doesn't seem to allow individual conductors from an outlet box.
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Old 02-16-2010, 10:38 AM   #14
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You are way over-thinking this.
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Old 02-16-2010, 10:50 AM   #15
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Quote:
Originally Posted by NolaTigaBait View Post
You are way over-thinking this.
Josh, I agree you are over-thinking it.

Just slap the damn fixture up over the box once you punch out the big KOs that allow box access. That is all the code requires.
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Old 02-16-2010, 11:12 AM   #16
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If the Badger ok's the install, you are good to go
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Old 02-16-2010, 11:15 AM   #17
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Quote:
Originally Posted by Wireless View Post
Romex connector
I've always used a 7/8" rubber bushing. But they are saying that you need to knock it out to a large size so I don't know of any bushings that big. I wonder if my 1 3/8" Unibit would be considered big enough for access to the box?
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Old 02-16-2010, 11:43 AM   #18
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Quote:
Originally Posted by JackBoot View Post
I've always used a 7/8" rubber bushing. But they are saying that you need to knock it out to a large size so I don't know of any bushings that big. I wonder if my 1 3/8" Unibit would be considered big enough for access to the box?
You need to use a fully dressed malleable steel 4" chase nipple
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Old 02-16-2010, 12:20 PM   #19
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Quote:
Originally Posted by JackBoot View Post
I've always used a 7/8" rubber bushing. But they are saying that you need to knock it out to a large size so I don't know of any bushings that big. I wonder if my 1 3/8" Unibit would be considered big enough for access to the box?
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Old 02-16-2010, 12:50 PM   #20
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Quote:
Originally Posted by Bob Badger View Post
You need to use a fully dressed malleable steel 4" chase nipple
And 4" chase locknut with 4" chase bushing.

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