UL Solutions Question Corner

Article archives by UL Solutions pertaining to electrical listing questions asked by electricians and inspectors.

Are EMT offset connectors or any EMT connectors or fittings Listed for use with threaded hubs, such as on a conduit body or Myers hub?

Question: EMT offset connectors A common practice I see in the field is EMT offset connectors screwed into hubs on ...

I know that UL provides strong support for the IAEI at section meetings, but what support do you provide for IAEI divisions or chapters?

Question: IAEI chapter and divisions and UL I know that UL provides strong support for the IAEI at section meetings, ...

Can a Listed panelboard be retrofitted into an existing cabinet that may be cemented into an existing wall?

Question: Retrofitted panelboard Can a Listed panelboard be retrofitted into an existing cabinet that may be cemented into an existing ...

Is it permitted to paint the face of a receptacle to match the paint in a room?

Question: Painting receptacles Is it permitted to paint the face of a receptacle to match the paint in a room? ...

Do these conductors have to be routed in the same cable or raceway or can the signal wire be routed separately?

Question: Smoke alarms Many hard-wired smoke alarms illustrate the interconnection of smoke alarms in their installation instructions depicting 3 wires, ...

Are fire alarms listed as a system and not just listed components?

Question: Listed fire alarm systems Are fire alarms listed as a system and not just listed components? How can an ...

Chinese National Sentenced to Prison for Dealing in Counterfeit Merchandise

U.S. Attorney Michael Shelby announced on February 16, 2005, that Zheng Xiao Yi, a citizen of the Peoples Republic of ...

Are commercial cooking appliances such as commercial electric ranges listed for use in a household?

Question: Commercial cooking appliances in households It seems that commercial cooking appliances installed in households are the new trend in ...

Is it permitted to replace a sign face on a listed sign?

Question: Electric signs Is it permitted to replace a sign face on a listed sign?   Answer This question was ...

Other than the typical fire and shock hazards, are there other safety concerns with motor-operated door systems that are commonly used for security in stores such as on pharmacy service counters?

Question: Motor-operated door systems Other than the typical fire and shock hazards, are there other safety concerns with motor-operated door ...