So I'm planning on wiring in three 240v cove heaters in my master bedroom and bathroom (on two separate thermostats). I've read through the manufacturer installation instructions, as well as information regarding the NEC standards for installation, and I just want to make sure I have everything correct.
Here's my diagram of what I'm planning on doing.
I had a couple questions in addition to this. I haven't found anything saying that 240v heater circuits need AFCI/GFCI breakers, is there a requirement for these in this circumstance? If not, would it be a good idea, or is it completely unnecessary?
Second, the cove heaters stick out about 1" from the wall, meaning the cable has an air gap to cross. I know there's a requirement to protect the cable from physical damage, but the manufacturer says not to use plastic conduit. Would this limit me to rigid/semi-rigid metallic conduit? Is there a way to clean this up to look a little nicer?
Thank you all for your assistance.
Edit1: More pictures
Best Answer
There is no need for arc fault on 240-volt circuits anywhere. The circuit that feeds the bath heater will have to be GFCI protected. I see no need for a junction box behind the heater. Just sleeve the wires with a short rigid nipple (my preference) or a nipple made of EMT. A rigid nipple entering the wall will need to be bushed to protect the wires entering. I would calk the hole entering the wall with latex calk and swipe it with a wet finger for a finished look.