No I do not have any objection to use one, I completely understand the safety reasons. I just need some justification to go back to my customer and explain to them that it is in fact required per the specifications. From your interpretation is it or isn't it required per UL508a, it does not...
Does a UL508 listed or CE safety marked control panel require the enclosure to only be opened with a special tool (screw driver) etc. I have a customer who is requesting to have screws added to a standard fiberglass enclosure that currently only has latches. This is what they have always done...
Does a control panel with only control circuits located inside require a disconnect switch? UL508a defines a control panel as two or more control or power components.
Section 39.1 states that "a control circuit intended to be supplied from a separate source shall be provided with a...
In a previous post thread237-198606 I asked about located the circuit protection outside the panel. Jraef responded that the VFD SCCR rating may need to be lowered because of this. If the VFD only states the fuse type/size necessary and doesn't say anything about the location of the circuit...
Does anybody know if there are any mfgs. out there that make Rohs compliant brushed DC gearmotors. Looking for about 150W with a 12:1 reduction, 24VDC.
We are looking to build a UL508 panel that will essentially only have a VFD, a disconnect, and an As-i communication module. The question is my customer says that they are putting all of there branch circuit protection in a central power distribution box and our box will be at a remote location...
