disconnect
disconnect
(OP)
I have a customer how wants to used a rotary disconnect in the control panel with a (Hoffman) hinged window kit over the handle. I Don't believe this would meet code. The NFPA 79 for machine building reads the disconnect needs to be readily accessible. Can anyone add to this..... Thanks





RE: disconnect
Anyway, I believe your assessment of the NFPA 79 rules is correct. The point behind "accessibility" is to facilitate a quick way to turn power off in an emergency. But if they have a separate EPO (Emergency Power Off) or EMO (EMergency Off) system in place that can be activated by, for instance an Emergency Stop push button on the outside which activates a UV Release on a circuit breaker or opens a main power contactor, then it may be legitimate to put the disconnect behind a window I suppose. I still don't see the point.
RE: disconnect
The point is I don't like the ideal of putting a door over the disconnect. I'm looking for more arguments on this subject.
RE: disconnect
However, might I suggest some wiring and a light that says something like "Safe to Turn Off" or "Do Not Turn Off" or something similar instead. The cover still won't guarantee the operator waits 15 seconds before shutting the thing off.
RE: disconnect
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com