UL listing required after modification

follybeacher

Member
Location
Hawaii
I have to add an ATS to an existing lineup. This will involve cutting some bolt on bussing extensions from the load side of the MCB, tapping the bus where we cut them, and extend conductors out and subsequently back in, i.e. normal power out and ATS load side power in.

I need to have this work relisted with UL. What's a cost effective method of doing this? Any recommendations for whom I can reach out to? Thanks
 

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paulengr

Senior Member
UL. On site inspection. Of course it’s really just Listing by an acceptable NRTL. ETL is a lot cheaper unless UL is in town.
 
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