600V 400A 3 Pole Double Pole Double Throw Switch

[hdp]

I have an application in which I would like to use a DPDT switch to toggle between two loads, connecting a source to the common terminal. In the typical DPDT switch application, a load is connected to the common terminal and is toggled between two sources. In that many of these switches I've observed mark the common terminal "LOAD", and the other two terminals "LINE", should I assume that this application would violate the UL Listing?

Thanks for any opinion or guidance.

 

[alehman]

Probably, because if you connect the line to the common terminal, the switch blades will be energized when the switch is open. That's something that could a rude surprise.

The NEC permits such applications when conditions of maintenance assure only qualified personnel may service the switch and it is clearly labeled.

 

[hdp]

Thanks alehman,

That was my conclusion also. I just wanted to insure that I was on track. It would be an inexpensive solution; however, the other considerations will force me in a different direction.

Thanks for your time & expertise.

 

[waross]

You can probably do it with a circuit breaker based transfer switch.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[hdp]

Thanks Bill,

I am going the breaker route.

I appreciate your input.

HDP