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Joined: Dec 2000
Posts: 4,289
Have you checked to see what the manufacturer's recommendations are for connecting the box, or seen any similarly equipped fire trucks ?

Joined: Dec 2002
Posts: 228
JCooper Offline OP
I am not sure about the y option, we need to make this idiot resistant. I will try giving Meltric a call one day this week to make sure I get the right part.

Joined: Jan 2006
Posts: 558
What about some kind of "pin and sleeve" type receptacle and cord cap arrangement that Hubbell, Leviton and crouse hinds make?


Joined: Jul 2004
Posts: 101
If you want "idiot resistant"*, one trick to writing a spec on the Meltric products is that Meltric is the only mfr who's plugs and connectors are UL listed as disconnect devices. All others, including the MIL spec "Cannon" plugs, need to have the power disconnected PRIOR to un-doing the connection.

*There is no such thing as idiot proof, they just make better idiots!

jraef #174208 01/29/08 07:38 AM
Joined: Mar 2005
Posts: 1,213
MIL-SPEC aren't UL listed, but that's almost a technicality- they're subject to a far more thorough battery of tests. Using a plug as a disconnect for servicible equipment is standard, as in military applications, you can't always spend time looking for the breaker.

NEC doesn't require UL listing, though, just that that components be "listed"... and then cops out and leaves the definition of "listed" to be whatever the AHJ wants it to be.

Joined: Jan 2005
Posts: 53
I have a couple questions? As a fellow nozzle nut why so many circuits for the fire truck? is this a shore line set up? or is it from the onboard genny to a piece of equip?

I made an interlock for our shore line to keep our dewalt batteries charged when plugged in and it switches over to generator power when the truck is being used on scene.

really simple cost about $80



Joined: Dec 2002
Posts: 228
JCooper Offline OP
This is for our outlet box on a cord reel fed from the generator. We have a dedicated 30 amp 240 v for the electric fan, and two 20 amp 120 v for flood lights.

I have to look into how our battery chargers are wired, they charge off the shore line but they also charge when the generator is running. I assume there is some backfeeding going on, which I don't think is a big problem unless the auto-eject fails and the generator is running when you start the truck.

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