240v 3 prong outlet ISSUES!!

JanosX

So to this point I've read just about everything on 240v, 3 prong wiring and I'm still stuck.

I bought a 240v, 4800w 20amp garage heater. I added the 30amp circuit (noted on the box as the required circuit), ran the 10/2 wire (it happens to be 10 CU 2, if that makes a difference, I was told it didn't), connected the 6-30p outlet, tested L1-ground, and L2-ground, each at 120v and...... the heater doesn't work.

I'm sure I'm missing something tremendously simple, but it's completely evading me.

Red Squirrel

Remove the breaker and make sure that it's a on using both busses. I had to shift a few breakers around in my panel to get a DP breaker to use both busses. Your panel might be arranged the same way.

To rule out a connection issue down the line test the two hots right at the breaker (be cautious while you have the cover removed while it's live).

edit: and also test at the plug, never even took into consideration it might be the heater itself.

Scuba_Dave

New heater or used ?

JanosX

You nailed it Red squirrel. I had the double breaker on the same bus.

I knew it was simple, just couldn't wrap my head around it.

Thanks.

Red Squirrel

Glad to hear that worked! Always nice when it turns out to be something simple that requires little change.