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High Bay Metal Halide #197838 12/23/10 12:01 AM
Joined: Jul 2002
Posts: 241
S
SJT Offline OP
Member
Good Holidays to all,
There are metal halide open glass type hanging fixtures. The contractor wired them with rubber cord, outlet above fixture, and they are 480V. Are the fixtures allowed to be fed with rubber cord? I thought the flexible cord would need to be rated at 90C? I don't like the idea of 480V for a plug in style High Bay fixture. There were some fixtures that had the receptacle 2 feet away. We turned that down and said the outlet has to be directly above the fixture.
Thoughts on 90C rubber cord?
Thanks

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Re: High Bay Metal Halide [Re: SJT] #197839 12/23/10 12:30 AM
Joined: Jun 2004
Posts: 1,273
T
Tesla Offline
Member
I'm confused by your original post.

Are you an electrical inspector?


Tesla
Re: High Bay Metal Halide [Re: SJT] #197840 12/23/10 01:50 AM
Joined: Jul 2002
Posts: 8,379
Trumpy Offline
Member
I don't have a problem with it, myself.
90C = 194F.
Rubber insulated cables tend to be treated like a poor cousin to PVC these days, however rubber was used prolifically before PVC hit the mainstream.

Slightly off-topic, rubber cables have good resistance to oil and other petroleum products, where as PVC has very little.

What sort of installation is this?
Is it a warehouse or something like that?

Re: High Bay Metal Halide [Re: Trumpy] #197843 12/23/10 10:11 AM
Joined: Jan 2005
Posts: 5,316
renosteinke Offline
Cat Servant
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It's a common, and IMO, preferred way to do it. In deed, using the cord/plug/receptacle costs a fair bit more than directly mounting the fizture to a box.

I prefer this method as it is a much easier, safer way to repair a fixture with a bad ballast. No need to kill the entire circuit; unplug it and take it down to the floor- where you can work o n it in comfort.

Re: High Bay Metal Halide [Re: renosteinke] #197845 12/23/10 11:44 AM
Joined: Apr 2002
Posts: 7,233
HotLine1 Offline
Member
SJT:

In addition to Renos views above (which I agree), the following info was not addressed:

Is the cord/plug assembly on the fixture a 'factory install' or 'factory option' ?
If the answer is yes, then there is no NEC Issues, other than the 2' seperation you mentioned.

If it's not a 'factory' item, then:

What type of 'cord'?
Voltage rating of the cord cap and receptacle?

Off the electrical spectrum, this type install allows some tenants to remove the lighting they installed when they vacate. Remember the NEC 'lighting outlet' definition, as those outlets in that hi-bay warehouse are all that are NEC required.



John
Re: High Bay Metal Halide [Re: Tesla] #197855 12/23/10 10:13 PM
Joined: Jul 2002
Posts: 241
S
SJT Offline OP
Member
Telsa,
I work full time as a Planner/Estimator for a Research Facility. I do not have the tools on at this job. One of my duties is that I look at jobs that are on-going with an Electrical committee, to make sure things are being done to code.
I also have a Part-time business, mainly residential work.

Re: High Bay Metal Halide [Re: SJT] #197861 12/24/10 12:41 AM
Joined: Mar 2004
Posts: 947
T
twh Offline
Member
Everything is legal except that which is prohibited.

Is there a 2 foot rule in your code or the contract? If not, the problem belongs to someone other than the installer.

I really like a 480 volt plug-in fixture, and the plug is better accessed if it isn't directly above the fixture. When I see a fixture hard-wired, I know the only consideration was the cost of the installation.

Re: High Bay Metal Halide [Re: twh] #197862 12/24/10 01:12 AM
Joined: Dec 2000
Posts: 4,287
electure Offline
Member


Originally Posted by twh
I really like a 480 volt plug-in fixture, and the plug is better accessed if it isn't directly above the fixture.


The NEC requires that electric discharge luminaires be located directly below the outlet or busway per NEC 410.62(C)(1)(1)

(The CEC must have differing rules on this)



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