240 volt compressor wiring

I have a 240 volt hot tub with a 50 amp circuit going to it and would like
to use the same wire run to power a 240 volt single phase air compressor.
I want to make sure, obviously, that I don't damage either unit, so I want
to get this right.
As I understand it, the compressor's 2 "Line" leads are going to be the 2
"hot" ones, and I won't use the neutral (white) wire to hook up to it. My
spa has all 3 wires (plus the ground) going into the panel.
Will I have a problem if I "T" off the 2 hot leads to the compressor? I
don't really have much money and would like to avoid hiring an electrician
to do this, but I will if I must. I do a lot of the basic electrical work
here at my house, so I have no problem making the connections, just
understanding the different voltages when they get over 120v.
BTW I live in the US, if that makes a difference.
Also, what is the recommended way to put a switch on the compressor circuit?
Reply to
GunninGopher
Loading thread data ...
First check the amp draw on the compressor. 50 might be a tad high for protecting the motor on the compressor.
Do you have a panel/junction box at the location where you want to do this? If so you could tap into the connections there and then add your new box with a reduced breaker sized for the compressor or just a outlet for the compressor.
Just suggestions.
Reply to
SQLit
compressor.
He *should* add a separate branch circuit (I used10-3 romex and a 30 amp breaker for my 240 volt unit). I regret not running 10-4, because I later had to power a light, contactor and it's control circuits using a near-by 120 volt branch.
Dave M.
Dave M.
Reply to
Dave M.
He *should* add a separate branch circuit (I used10-3 romex and a 30 amp
Sorry... It should be 10-2 and 10-3 Romex.
Dave M.
Reply to
Dave M.
OK. I hadn't considered that. You're saying that I should add a sub-panel there and split the compressor off on a 15 amp circuit, since that is what it is rated for. Good idea, I guess. That would solve the switch problem too.
compressor?
Reply to
GunninGopher

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.