If I build a panel that is inside an enclosure that has a 120V AC cord going into a circuit breaker, which then feeds into a power supply that changes 120V AC to 24V DC, which then is fed to a bunch of 24V modules that do really simple things like data acquisition and send it out over the network on Modbus TCP, does this box need a UL 508A field label from an NRTL or some other entity capable of making field evaluations?
Or if not UL 508A, is there some other UL standard it should be evaluated under?
Or if not UL 508A, is there some other UL standard it should be evaluated under?