UL 508A Frequently Asked Questions

Q. We build panels, basically containing: 1) DC power supply for control 2) PLC (with it's power supply 3). Panel mounted lamps 4). Terminal blocks. We have a single point voltage input from our customer (the end user). We have a disconnect and suplementary breaker. Does SCCR apply?

A. No, based your panel description, your panel only contains a control circuit.

Category: Application

Keywords: DC power supply, PLC, terminal block, supplementary, breaker