I'm installing one of the heaters below in my garage. It's 240v 4800w and will be aproximatly 25' of wire from the panel to the heater. My plan is to use a 20 amp double pole breaker, #12 thwn in conduit to a junction box with a double pole switch then a short peice (maybe 18") of 12-3 mc between the box and the unit. Is that an acceptable method or should I be using a 30 amp and #10? I probably don't need the switch but I want to keep others from using the breaker as a disconnect.
Thanks in advance for any advice.
Thanks in advance for any advice.