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Wiring an Hour Meter to my Compressor.

12K views 6 replies 4 participants last post by  Fast Orange 
#1 ·
I would really appreaciate help from some folks..

I have received my hour meter and there were no wiring diagrams with it.
I have a basic idear of what I should do but need confirmation if what I'm thinking, is correct?

The hour meter has two terminals in the backside, neither are marked + or - so polarity is not a factor (I think). I was told that it should be run in parallel on the motor side of the pressure switch?

A buddy of mine came up with the following schematic (if that's what you want to call it) ;)
 
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#3 ·
That will work, as long as the hour meter is a 220V rated unit.If the meter is 120V,connect 1 leg to a neutral on the compressor or if no neutral,connect it to ground.The other leg will still conect to a motor side terminal on the pressure switch.I know it's not "code" to hook up to ground to power the meter,but in this case,as long as the compressor is grounded,the current is so small through the meter that there should be no problems.

George :cool:
 
#5 ·
Doc here, :pimp:

Check with your supplier...

If I read the numbers correctly, It's a 277 VAC 20 Amp meter (meaning 3 phase)

It may work for 1 phase 220, / 110 but I'd Check to be sure..

Doc :pimp:


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