Looking into some educational information on UL listings. As a generator technician I am sometimes tasked with making modifications to the Transfer Switch. Some of these modifications may be minor but others intrusive such as contactor and controller change. I am curious how does this change the UL listing and if it does what can this impact?
Automatic Transfer Switch UL Listing
- Thread starter jbrown013
- Start date
ron
Senior Member
- Location
- New York, 40.7514,-73.9925
Any non-OEM direct equipment change would affect the listing IMHO. UL has a field inspection option (expensive) to update the listing on site.
Unfortunately, in my experience the code leaves it up to the AHJ to determine if the field modification is in line with the product application from the factory.
Another thing to think about is if the field modification would void a warranty. While code compliant, you could get into trouble with your ownership if they aren't able to warranty it.
Another thing to think about is if the field modification would void a warranty. While code compliant, you could get into trouble with your ownership if they aren't able to warranty it.
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
Also liability in this litigious society.