LundenFog
Member
- Location
- Wharton NJ
In UL508A it says control panels are to be mounted in ordinary spaces... I can't find that definition in the NEC ??
In UL508A it says control panels are to be mounted in ordinary spaces... I can't find that definition in the NEC ??
We have a remote control panel containing a PLC mounted to the ceiling. The UL inspector said we have to follow the 508A mounting standard?? that was all i could find
Is that LB on the right pulled apart? It does not look right.
Since the door would be on the bottom, how would you interpret the horizontal working space clearance in "front" of the panel?Never seen that done before. This panel will be subject to working clearances same as any other panel. Otherwise
I would guess it's ok. I would hate to have to work in that thing.
Since the door would be on the bottom, how would you interpret the horizontal working space clearance in "front" of the panel?
And would the entire space down to floor level "below" the panel become dedicated electrical space? It seems to me that the latter would negate any advantage of ceiling mounting.
Though there possibly should be rules covering depth of side by side equipment it is not specifically mentioned from what I see , only such requirements that are there are for equipment in a vertical relationship to one another - and even those have a 6 inch allowed variance in depth before you have to somehow move the shallower components to get within the 6 inch variance.We had our inspection yesterday... and the inspector had no problem with the panels on the ceiling. However he did have an issue with panels of different depths mounted side by side. He said that all panels mounted side by side had to be the same depth to the face of the panel off of the wall. I can't find that requirement in the NEC.??
So if we have a 12" deep control panel mounted next to a standard disconnect, he wants us to build out behind the disconnect to bring it out flush with the panel.
That was the only big thing that he found... overall not bad... but it would be great not to have to move a number of these boxes out
Thanks,
Kevin
So if we have a 12" deep control panel mounted next to a standard disconnect, he wants us to build out behind the disconnect to bring it out flush with the panel.
Thanks,
Kevin
I think your inspector is wrong. I have never seen any panel/disconnect layout that had to meet a 'flush' front requirement. In fact, I don't think I have ever seen one built like
that because disconnects are usually not as deep as the panels. It might be the ceiling mount has the inspector concerned in some way. I am unaware of any requirement that
faces of panels and disconnects are flush. Did he give you a tolerance to work with?