[bsjbrown]

Thanks for your reply. I purchased a PTAC unit and nowhere in the owner's manual does it indicate amps required; however, on the plug it has 20Amps so I'm assuming that what it requires. My question is that the circuit breaker is 30 amps, do I need to change it to 20 amps or is the 30amp breaker okay?

[stanfortyman]

How about telling us the make and model?

What do the instructions/manual say? They would indicate the required circuit amperage.

[ballengerb1]

Please describe the plug on your AC unit. If it in fact requires 20 amps and you have a properly wired 30 amp circuit you should be fine but plesae describe the plug and then the receptacle you have

[bsjbrown]

Looking at the NEMA Straight Blade Configurations chart, the receptacle is 6-20R and the plug on the unit is a 6-20P.

[stanfortyman]

the receptacle is 6-20R and the plug on the unit is a 6-20P.

WHY do you have a 30A breaker feeding a 20A receptacle? That was wrong from the start.

Change the breaker to 20A and plug it in.

[creahands]

The amps required by a unit, as recommended by manufacturer, should be size of breaker. If larger the unit will not be protected and if overloaded could cause a fire.

Chuck