Hello experts,

I'm trying to understand what electrical products require NRTL approval for 
electrical safety for sale in the United States.

Looking on the OSHA website I find this page 
 which links to this page (

Taking this at face value, particularly 303(g)(2)(i), does this mean that 
equipment operating at less than 50V (I'm assuming DC and AC RMS) does not 
require NRTL approval? 

The question comes from a customer who was emailed by one of his US customers 
stating that he should have "UL listing". I understand that NRTL approval and 
the Listing process are different with the latter being more involved? Would 
appreciate any comments on this. 

Thanks as always. 

All the best 

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