NEMA 14-30R (not 14-30P) to TT-30R?

Executive wrote:
In VAC terms...

WHITE is ALWAYS Neutral
GREEN is ALWAYS Ground
ANY OTHER COLOR is ALWAYS HOT!

ALWAYS use a tester to VERIFY and turn OFF power before playing with it....Dennis

Seldom seen but GREY is also always Neutral.

Dusty

smkettner wrote:
Yes. Just put a wire nut on one of the hot connections to cap it off and wire the rest to the new outlet.

Replace the breaker with a single pole 120v breaker too.

GordonThree wrote:

works for campgrounds... every camp i've ever visited used a breaker as a disconnect switch instead of a proper knife switch.

supposedly a breaker's not supposed to be used as a disconnect since it has a small number of contact closures versus a proper switch, at least I think I read that somewhere.

Interesting question... A breaker is not supposed to be used as a switching device unless designed and UL/CSA approved for it. They make 15 amp and 20 amp switching duty ones only that are marked SWD. Some info. here and here. I have seen a few newer pedestals with a warning sticker on them to turn the breaker off before energizing or de-energizing an RV.

As well, I'm pretty sure CG pedestals and the breakers in them aren't designed and approved for use in damp locations (unless in an arid region of the US) but it's done all the time.

Breakers in a CG pedestal can take a real beating. I don't think the NEC folks are aware of what really goes on in CGs. Sometimes they can take decades to deal with some issues, for example, the old style weatherproof recept. with 2 flaps that was no longer weatherproof as soon as something got plugged in. Now w/p receptacles have a hood that covers the complete recept. when plugged in.

DubV wrote:
Thank you Gents. I assuming the double pole breaker takes 240v to trip vice the single at 120v?

If the breaker is working properly / within spec, a fault on either pole will trip both poles.

DubV wrote:
Until I can get my hands on a disconnect, Could I just flip the new breaker after its hooked up?

works for campgrounds... every camp i've ever visited used a breaker as a disconnect switch instead of a proper knife switch.

supposedly a breaker's not supposed to be used as a disconnect since it has a small number of contact closures versus a proper switch, at least I think I read that somewhere.

In VAC terms...

WHITE is ALWAYS Neutral
GREEN is ALWAYS Ground
ANY OTHER COLOR is ALWAYS HOT!

ALWAYS use a tester to VERIFY and turn OFF power before playing with it....Dennis

Thank you Gents. I assuming the double pole breaker takes 240v to trip vice the single at 120v?

Until I can get my hands on a disconnect, Could I just flip the new breaker after its hooked up?

If I can add one thing, I recommend installing a disconnect switch at your new TT-30R so you aren't plugging in live all the time. This can cause damage to your shore power cord plug blades and possible eventual overheating. A motor HP rated toggle switch is compact and fits in a standard outlet box.

\

L1 vs L2 imbalance.

I've yet to see a multi-voltage installation that had continuously balanced L1, and L2 voltages (load).

If one has constantly higher potential I choose it as the phase tap for 120 vac operation.

Reminds me to rig up a TVS system on the receptacle where my microwave plugs in. When the microwave shuts off, it either turns on or off the wireless outlet relay I use on an outside light.

Nema 14-30R.......240V service
2 hots, 1 neutral, 1 ground


Nema TT-30R....120V service
1 hot, 1 neutral, 1 ground




Go to Circuit Breaker Panel and locate the 30A double pole CB that the 14-30R is fed from.
Turn it off.
Disconnect load side wires from CB.
Remove CB and replace with a 30A single pole circuit breaker.
Wire nut one of the hot legs and wrap with electrician tape......connect other lead to new CB. (leave CB OFF)

Remove 14-30R receptacle....disconnect all wires
Connect the 1 hot leg, 1 neutral and 1 ground wire to new TT-30 receptacle and then install it in outlet box.

Turn on new 30A single pole CB and test voltage readings on new TT-30 receptacle.

Just as a foot note I have seen blue substituted for red all other things being the same.