Thru-Door Disconnect
Thru-Door Disconnect
(OP)
On Industrial control enclosures (PLC-type enclosures) IF the power supply to the enclosure is 120VAC (or below) single phase, IS THRU-DOOR INTERLOCK REQUIRED? Commonly door-interlocked breakers are only available in 3-pole configuration.





RE: Thru-Door Disconnect
60.2 An industrial control panel provided with a separately supplied control circuit where the
disconnecting means and/or branch circuit protection is omitted shall be marked to indicate that these
devices shall be provided by the installer.
If it's part of machineery then I don't think so. I've seen 120vac boxes with disconnects where they only used 2 of the three poles.
RE: Thru-Door Disconnect
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David Baird
Sr Controls Designer
EET degree.
Journeyman Electrician.