Circuit breaker pistol grip guard 1

[dithomas]

Does anyone know of a guard designed to prevent a circuit breaker switch from being accidentally operated?

Thanks.

 

[racobb]

So now we are saying that a control handle not installed is to blame for a piece of equipment mis wired and apparently not properly tested getting someone hurt? I do not agree with locked devices, but in my 30+ years of substation work, I have yet to be able to get to the handle before the event is over.

It is simple enough to flip up a cover and operate a handle if one knows that is all that is needed. Locked or removed handles are another story.

If we are talking about the NEC, I believe locked handles for overcurrent devices would not be allowed. I will be corrected if wrong.

Alan

 

[ScottyUK]

E-stops on machinery and circuit breakers are different animals - over here in IEC-land an emergency stop has to be a prominent actuator coloured red and has to be clearly identified. E-stop buttons are available as options on some MCCBs and ACBs to replace the mechanical 'open' button, but a standard breaker would not meet the requirements for an E-stop.

The OP only said 'circuit breaker' and that could be anything from an MCB to a transmission system breaker, and the OP has gone to sleep while we speculate.


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If we learn from our mistakes I'm getting a great education!

 

[racobb]

Agree Completely! It depends most certainly on the installation and codes.

Eventhough, I would never support a locked handle on any protective device. Cover yes.

Alan

 

[Zogzog]

"and the OP has gone to sleep while we speculate"

As usual

How about this for perspective. I was a submarine guy in the navy, in the event of an emergency we would scram (Emergency shutdown) the reactor, and to do so we had to lift a hinged plastic cover and turn a switch. Sure it took another split second to lift the cover but I bet Naval Reactors researched it and decided inadvertant operation is worse than a short delay.