UL Listing of SIgns

[rhall]

When do you require U.L. listing for signs or do you?

 

[Mark K]

While a UL listings may be considered as evidence of compliance the building official should also be open to other means of establishing code compliance.

For example Chapter 7 of the IBC references UL263 and ASTM E119. Thus if a manufacturer could show compliance with ASTM E119 by means of a test report prepared by an approved testing laboratory there would be no need for a UL listing.

What exactly does the electrical code say about UL listing.

 

[rhall]

NEC 600.3 requires that signs be listed and installed in conformance with that listing, unless otherwise approved by special permission, i.e. by the AHJ. What we see most of the time is a cabinet that has listed lighting fixtures. 600.3(B) exempts outline lighting with a listed lighting system but does not make a reference to cabinet signs. Not sure what the justification is for requiring listing with a simple box sign, but I am looking for some type of bar to set as to when it should be required.

 

[raider1]

NEC 600.3 requires that signs be listed and installed in conformance with that listing, unless otherwise approved by special permission, i.e. by the AHJ. What we see most of the time is a cabinet that has listed lighting fixtures. 600.3(B) exempts outline lighting with a listed lighting system but does not make a reference to cabinet signs. Not sure what the justification is for requiring listing with a simple box sign, but I am looking for some type of bar to set as to when it should be required.

If it is an electric sign I would require it to be list in accordance with 600.3.

Chris