Air Compressor Pressure switch, mag starter wiring problems

F

Fred T

Cast Iron

Joined

Jan 20, 2003

Location

Ohio

• Sep 3, 2020

• #1

Gentlemen,
Does anyone have a photo they could share of a correctly wired Square D mag starter using a pressure switch as an off and on for an air compressor. The coil is 208-220v, as is the 5 hp motor. The mag starter/overload is new as is the pressure switch. I don't read schematics very well at all thus the photo request.

Thank you all
Fred T

 

B

BT Fabrication

Titanium

Joined

Nov 3, 2019

Location

Ontario Canada

• Sep 3, 2020

• #2

whats the picture of what you currently have and what does the diagram say?

essentially you have your power feed line in at one side of the large lugs, output on the other and a switch that turns on the magnet coil on top

 

F

Fred T

Cast Iron

Joined

Jan 20, 2003

Location

Ohio

• Sep 3, 2020

• #3

BT,
The mag starter came without any wiring diagram, that may be a large part of my problem.

 

C

CatMan

Hot Rolled

Joined

Apr 12, 2005

Location

Brandon, MS

• Sep 3, 2020

• #4

Do you see anything on the starter marked line or load?

Post a picture of the inside of the mag starter.

 

A

akajun

Stainless

Joined

Jul 1, 2011

Location

Brusly, LA

• Sep 3, 2020

• #5

Not a square D but an Eaton on my new Champion, maybe that helps

 

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F

Fred T

Cast Iron

Joined

Jan 20, 2003

Location

Ohio

• Sep 3, 2020

• #6

mag starter

I think this is a picture, Im not to well versed in this

 

D

Dan from Oakland

Titanium

Joined

Sep 15, 2005

Location

Oakland, CA

• Sep 3, 2020

• #7

put your pressure switch contact terminals in series with your coil leads. Your on- off switch should also be in series in the same circuit. The contactor does not need to latch if you are turning on and off via the pressure switch, so you don't need to use any aux contact terminals on the motor starter.

 

F

Fred T

Cast Iron

Joined

Jan 20, 2003

Location

Ohio

• Sep 3, 2020

• #8

Doesn't that negate the mag starter?

 

F

Fred T

Cast Iron

Joined

Jan 20, 2003

Location

Ohio

• Sep 8, 2020

• #9

Fred T said:

Doesn't that negate the mag starter?

Click to expand...

Gentlemen,
All is good in the world, I had an electrician stop over and take care of it. it did help that Schneider Electronics sent me a schematic and my friend know what he was looking at. Thank you all for taking the time to look and try to help.

Fred T