Prolly be able to figure this out by futzing with it but since I am at work and can ask......

Square D pressure switch has 4 connections. Something like T1,L1,L2,T2 (IN ORDER FORM LEFT TO RIGHT). Diagram sent with the switch is of no help. L1 and L2 connect to a M with a circle around it (what does that mean??) T1 and T2 connect to "L" (live/hot).

I've got a York with magnetic clutch so only one wire coming out of the compressor. Have the toggle on the the dash. I was going to run one wire fromt he toggle to fuse box, the other to the pressure switch along with the one lead from the compressor. Do I use the L or T terminals?? Does it even matter

#2 Does the pressure switch itself need to be grounded?? There is a screw on the base plate with a ground symbol. Compressor is grounded.

Thanks in advance. Dan

the square d preasure switch does not need to be grounded and only two of the terminals on it are used for this application.two on the right or the two on the left.

:beer:

Thanks. I'll give it a shot.

Dan

the square d preasure switch does not need to be grounded and only two of the terminals on it are used for this application.two on the right or the two on the left.

:beer:

I just got the same switch and have the same question. So if I use L1 and T1 then, I assume I could use either one for power in, and power out?

I just got the same switch and have the same question. So if I use L1 and T1 then, I assume I could use either one for power in, and power out?
T= Load(power out to motor for explanation)
L= Line(feeding power to ?)
M w/ circle= Motor
L1 & L2 are if you need to supply two sources of power to T1 & T2(think 120v or 240v) leg 1 would be 1st phase of 120v, while leg 2 is the 2nd phase of power to make 240v.
These pressure switches are like a contactor. Make sure you keep the 1's together and the same w/ 2's.
Now toss up the SQ-D pressure switch p/n's please.
Good luck,
Campy

T= Load(power out to motor for explanation)
L= Line(feeding power to ?)
M w/ circle= Motor
L1 & L2 are if you need to supply two sources of power to T1 & T2(think 120v or 240v) leg 1 would be 1st phase of 120v, while leg 2 is the 2nd phase of power to make 240v.
These pressure switches are like a contactor. Make sure you keep the 1's together and the same w/ 2's.
Now toss up the SQ-D pressure switch p/n's please.
Good luck,
Campy

Thanks. I don't have the part# handy, but i found it at Grainger. They have a few to select from, depending on the psi range you want and how much adjustabitlity you need. MIne is factory preset for 80-100psi.

Thanks. I don't have the part# handy, but i found it at Grainger. They have a few to select from, depending on the psi range you want and how much adjustabitlity you need. MIne is factory preset for 80-100psi.
Cool, when you find it can you pm me the p/n?
Thanks,
Campy:cool2:

Cool, when you find it can you pm me the p/n?
Thanks,
Campy:cool2:

PM sent:
http://www.grainger.com/Grainger/wwg/itemDetailsRender.shtml?ItemId=1611599876