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#91584 - 01/24/05 02:45 PM UL vs. NEC  
martinvalley  Offline
Junior Member
Joined: Jan 2005
Posts: 1
Westwood, NJ, USA
Trying to get ahnadle on NEC rating or use vs. UL approval. For instance, if a cstrain relife cord grip fittings is UL listed to Standard 514B, would this amke it suitable for use in a Class I, Division II, Group D environment. Is there a relationship or crossover between UL and NEC?


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#91585 - 01/24/05 04:37 PM Re: UL vs. NEC  
safetygem  Offline
Member
Joined: Jan 2002
Posts: 119
Ohio, USA
I do not believe there are any restrictions on the use of strain relief devices in Classified Locations. I say this because... the NEC allows the use of "general-purpose" equipment in Division 2 locations when:
Quote
500.8(A)(3) Where specifically permitted in Articles 501 through 503, general-purpose equipment or equipment in general-purpose enclosures shall be permitted to be installed in Division 2 locations if the equipment does not constitute a source of ignition under normal operating conditions.


BTW, scope of UL 514b covers a wide variety of equipment. Some of the equipment has been tested for use in classified locations... but not all of it has been tested for this use.

Hope this helps.


#91586 - 01/24/05 11:17 PM Re: UL vs. NEC  
John Steinke  Offline
Member
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
There is absolutely NO connection between any NEC section number, and the number of a UL standard.

UL does test electrical equipment, and the NEC plays an important part in determining what the test criteria may be....but UL test to a lot of standards that have nothing to do with the electrical trade.

The best source as to what a particuler UL standard, or listing, means is the UL web site.

The best place to discuss the code is, frankly, this web site. How and why the NFPA let this happen is a secret know only to them!


#91587 - 01/25/05 06:05 PM Re: UL vs. NEC  
safetygem  Offline
Member
Joined: Jan 2002
Posts: 119
Ohio, USA
John... you are absolutely right. I should have made your point about correlation clear in my post.

BTW... for any that are interested. You can always look at the scope of a UL standard and determine fundamentally what the intended usage is for a piece of equipment.

All UL standard scopes can be reviewed on their website at the following address: http://ulstandardsinfonet.ul.com/scopes/

[This message has been edited by safetygem (edited 01-25-2005).]



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