[C320-list] Power supply for AC install

[Warren Updike]

I don't think you have a problem. There is no problem per-se with a 20A
breaker on a 30A supply. If 12A is correct for the water heater, the A/C
should only draw 9-10A when cooling, and that is only for the initial start.
Continuous running while cooling will be less than 9A. We run our 12K unit
on the main 30A AC power supply with no problems. Admittedly, we don't often
heat water with AC.
If you have a heating coil in the unit, then the draw could be close to
18-20A. Still, I wouldn't think that is a continuous draw. Check with
Flagship as to what the constant current loads are for cooling and heating.
Then go from there. 

Warren and Pattie Updike
1994 C320 "Warr de Mar" #62

-----Original Message-----
From: Alan Goodman [mailto:goodmanalanlee at hotmail.com] 
Sent: Monday, April 28, 2014 2:08 PM
To: c320-list at lists.catalina320.com
Subject: [C320-list] Power supply for AC install

Hello all:  I am self-installing my air conditioner over the next month.  I
bought a 12K BTU from Flagship Marine.  I need to install a 20A 120V circuit
to supply the unit.  I have found a source for the exact same breaker as the
factory installed AC breakers.  I rather not have to install a second shore
power circuit to supply the power, but on the other hand I'll be installing
a 20A breaker in a 30A circuit.  Obviously I should not run the water heater
(about 12 A @ 120V) while the AC is on.  This is a downside I can live with.
Are there other considerations I should consider?  My question is what have
others done? 

Alan Goodman   Hull #67  Holland, Michigan