Electrical Questions? Ask an Electrician Online.
How do you want it to work? Do you want it to turn off when either door is open? Is this for spray painting? Do you know how to turn off the air when the exhaust is not working?
Each switch has a common and a NC and NO contact.
Do you have a solenoid valve on the air line?
Do you only want the fan to turn off when either door is open?
Yes I want it to turn off when door is open. yes for spray painting. to turn off the air wont it be wired the same as for these switches? yes there is a solenoid on the air line. with a common, NC, NO contact don't you run a 110 leg to each side (red,blk) yes when door is open but shut off with on/off toggle switch when not in use
For this you must wire in series to the motor contactor control circuit. Use the common and NO terminals so when the doors are closed the switch will close, so both doors will be closed to make the motor run.
Do you have a starter to control the motor?
contactor motor not mag start
Use an aux contact on the starter to control the solenoid valve, when the starter is on the air valve is on.
Do you have an aux contact on the contactor?
How big is the motor?
ok is there a schematic somewhere to follow? motor is 2hp
Do you have some type of overload protection on the motor?
yes there is a reset button
So you could have power to the motor and it would need to be reset. This makes it hard to control the valve.
Take one leg off the contactor to the solenoid valve to turn on the air when the motor is running. The reset button on the motor could be a big problem for you. Using a starter and overloads instead of the internal protection would be a better bet. I would not approve this installation if I was inspecting it. It is not designed to be fail safe
Have you talked to your mechanical inspector about this installation?
I would advise it before you go any further so you don't do something you have to change
I would hate to see you have problems
Are you the electrician wiring the booth?
ok I will do that and thanks for the input
yes I am
I want you to be successful on your first try
Ok, cool. Come back here after you talk to inspectors. I will then help you succeed,.
Your success is my goal
I have to sleep now. Talk to you soon.