"SQLit" wrote in message
...
What is on the circuit now? 600 watts at 120v could be a problem.

A 600 watt transformer at 12v or 120v?

Watts are Watts are Watts.

A 15A circuit fully loaded is about 1800 watts. 80% loaded (which is a good
safety threshold) is 1440 watts. Doesn't matter if those watts are at 120V
or 12V, they're watts.

(it's AMPS that depend on the voltage, eg. 600W of lighting at 12V is 50A,
which would require some pretty hefty wire).

-Tim