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Hello all, I'm designing a UL508A control panel which is a 24Vdc sub panel fed by the main panel and contains control circuits only. Now I'm looking for a disconnect switch with rotary operator for the incoming 24Vdc supply (as I think this is required). However, I can't find a UL98 (or maybe...

I'm designing a control panel according to UL508A and I'm in doubt whether to use Part 1: General use industrial control panels or also part 2: Control panels for Industrial machinery UL508A defines industrial machinery as follows: So, does this mean that for other applications, for example...

Hi, in the industrial control cabinet I'm designing there is a power supply with 24Vdc 20 amp output which powers several circuits with overcurrent protection for each circuit: PLC, relays, but also some small stepper motors. Now my question is if the stepper motor circuits can be considered as...

When designing a circuit for a UL508A industrial control panel, I'm having a hard time finding UL ratings of listed or recognized components, especially for relays. I'm looking at datasheets, UL certificates, UL product IQ, but often there are no UL ratings given. At the moment, I'm looking...

Hi, I'm an electrical engineer designing a schematic for an UL508A industrial control panel. The control circuit will be fed from a 12V battery of a genset from the field. This supply to the control panel will need a disconnect switch (disconnect in every incoming supply). The problem is...