Single Disconnect Point

[ToggleTheBits]

I've been searching everywhere for a solution to my problem and was hoping someone here may have some insight.

My goal is to set up a disconnect on a 480V control cabinet that both interlocks the door and takes care of any arc flash concern so PPE is not required. The current setup we have been using is to mount a Main supply disconnect to the side of the enclosure in another box and then a secondary disconnect that is interlocking the door of the enclosure.

The problem being that the main supply doesn't interlock the door and the secondary interlock doesn't remove power from the line and thus requires proper PPE to work in the box.

Is there a solution that covers both of these cases?

 

[tortuga]

My goal is to set up a disconnect on a 480V control cabinet that both interlocks the door and takes care of any arc flash concern so PPE is not required. The current setup we have been using is to mount a Main supply disconnect to the side of the enclosure in another box

My understanding of the rules is all you need is that disconnect on the wall locked off if someone is opening the door to work on the control panel. For any 480V machiene PPE rules apply if it is energized, as in not locked off on the wall disconnect..

I recently worked on a old hydraulic press system converting it from 480V to 240V, at first I was not clear on the reasoning but it was so PPE would not be required when it was moved to a R&D prototyping area where it would be getting reconfigured allot, and by converting to 240V they got more flexibility on PPE.