I'm trying to wire in an air compressor (240/15). I have no more room on my electrical breaker box. I was recommended a breaker by Cutler-Hammer that takes the place of a 240v double pole breaker. So basically it's a 4 pole double 240/20 breaker. The guy told me to pull out my water heater breaker and put this one in. Wire the water heater to the 2 center terminals and wire the compressor to the 2 outer terminals or vice versa, doesn't matter.
So today pulled the old breaker out and put this one in. I placed the water heater to the outer terminals and checked the water heater if it was on. It wasn't. I made sure the breaker was flipped on and I checked for volts. I had 0. So I placed the wires to the inner terminals and checked the water heater. It was on and I had 240v on my meter.

So then I took the wires off. And checked volts on the inner and outer terminals and still got 240v on the inside but 0 on the outside.
Did I get a bad breaker or I'm I overlooking something or was I misinformed? Thanks
So today pulled the old breaker out and put this one in. I placed the water heater to the outer terminals and checked the water heater if it was on. It wasn't. I made sure the breaker was flipped on and I checked for volts. I had 0. So I placed the wires to the inner terminals and checked the water heater. It was on and I had 240v on my meter.


So then I took the wires off. And checked volts on the inner and outer terminals and still got 240v on the inside but 0 on the outside.
Did I get a bad breaker or I'm I overlooking something or was I misinformed? Thanks

