30 15 amp circuit breaker

BTPO1 wrote:


X2, it is a 30-15 breaker for a reason. JMO

OK so there are at least a couple of supposed electrical experts who frequent here and..........

What possible electrical reason could there be for having the main breaker (30 amp) ganged to the water heater breaker (15 amp) ??

This makes no sense to me and I see absolutely nothing wrong with putting in two individual breakers of the proper size.

If you have an available slot in your breaker panel it would probably be far easier, cheaper, and quicker to use separate breakers instead of the weird 30/15 tandem.
If you have to use the tandem then the Siemens should fit. Just about any RV panel I've seen uses breakers that are physically compatible with Siemens breakers. For the record the following breakers are all physically interchangeable: Siemens, Westinghouse, Murray, Cuttler Hammer BR series, Square D Homeline series, GE, and ITE.
If this were a job getting inspected then there may be a problem mixing brands if you had a really picky inspector. Since I'm sure that's not the case you will be fine.
Do not leave the WH connected to the 30 amp breaker. That breaker, being the main, is actually fed at the terminal so your WH wire is live all the way from the plug. In other words, there's no way to turn off that circuit except to unplug the RV. If you ever use an adapter to connect your 30A service to a 50A outlet then the 50A breaker in the pedestal is all that is "protecting" the wire to the WH. Not a good situation.

BB_TX wrote:
Not all manufacturers breakers are interchangeable. Get the manufacturer model number off the breaker and then google it. I had the same problem finding a 20/15 breaker. Googled the model number and found numerous sources. Bought one on line, delivered in a couple days, and installed it.

And no, do not leave the water heater on a 30 amp breaker. The wire is not likely sized for that current. A short could cause a fire.

X2, it is a 30-15 breaker for a reason. JMO

Buy a 30A single for Main and a 15A single for water heater.

Just need to match up style with what is in your breaker box

Not all manufacturers breakers are interchangeable. Get the manufacturer model number off the breaker and then google it. I had the same problem finding a 20/15 breaker. Googled the model number and found numerous sources. Bought one on line, delivered in a couple days, and installed it.

And no, do not leave the water heater on a 30 amp breaker. The wire is not likely sized for that current. A short could cause a fire.

http://www.bestconverter.com/Twin-30-15-Amp-Circuit-Breaker

Pic is wrong but call Randy with your power center make/model for exact match.

gbopp wrote:
Will the Siemens breaker work in the OP's breaker box? Are the breakers universal,?

I don't know. If you look below where they show similar products there is a Murray brand (which I've never heard of) 30/15.

Will the Siemens breaker work in the OP's breaker box? Are the breakers universal,?

Siemans must not have received the news that they weren't being made anymore:

Amazon

It's rare when you can't find something on Amazon.