electrical question

[37chief]

I am hooking up a 220 v compressor. The tank pressure control switch has two sets of double contacts. Two are marked (line load). The other two are marked (load line) Should the 220 v power in , go to the line load?

 

[wore out]

I am hooking up a 220 v compressor. The tank pressure control switch has two sets of double contacts. Two are marked (line load). The other two are marked (load line) Should the 220 v power in , go to the line load?

Incoming power goes to the two LINE terminals, the motor connects to the two LOAD terminals.

 

[used red MN]

I am hooking up a 220 v compressor. The tank pressure control switch has two sets of double contacts. Two are marked (line load). The other two are marked (load line) Should the 220 v power in , go to the line load?

Are you definitely sure this is the exact wording, that “load” is in both labels? Echoing what wore out is saying “Line” and “Load” should be the identifying terms. Having “Load” in each label would not make sense. In actuality on a 220v AC double contact switch I doubt it would even make a difference. It’s not like it is a DC load where the arc potential is always directional.

 

[kencombs]

I am hooking up a 220 v compressor. The tank pressure control switch has two sets of double contacts. Two are marked (line load). The other two are marked (load line) Should the 220 v power in , go to the line load?

I'm confused, two sets of doubles would be very unusual. I interpret that as a total of eight contacts, or is it four, anyway I can't picture that. Any way to help us out with a snapshot of the wiring? I'm with the others, one pair of wire connections, to one side of a double contact should be line, the other side should be load. But, I feel like I'm missing something.

 

[used red MN]

I'm confused, two sets of doubles would be very unusual. I interpret that as a total of eight contacts, or is it four, anyway I can't picture that. Any way to help us out with a snapshot of the wiring? I'm with the others, one pair of wire connections, to one side of a double contact should be line, the other side should be load. But, I feel like I'm missing something.

His wording may not be spot on in “technical electrical terminology” but this is what I am picturing. This is a photo of the switch on MY compressor, it’s on a 110 volts. I am not even going to try to give the “technical” name, but it is probably considered “1 set”..

Probably called a 2 line switch, as I said I honestly don’t know.

 

[37chief]

His wording may not be spot on in “technical electrical terminology” but this is what I am picturing. This is a photo of the switch on MY compressor, it’s on a 110 volts. I am not even going to try to give the “technical” name, but it is probably considered “1 set”..View attachment 79618 Probably called a 2 line switch, as I said I honestly don’t know.

 

[37chief]

His wording may not be spot on in “technical electrical terminology” but this is what I am picturing. This is a photo of the switch on MY compressor, it’s on a 110 volts. I am not even going to try to give the “technical” name, but it is probably considered “1 set”..View attachment 79618 Probably called a 2 line switch, as I said I honestly don’t know.

That is what I have. stan

 

[Mike(NEOhio)]

wore out got it. For 220 you need to switch both sides of the circuit. Don't be confused by their positions. Two sets of contacts to make or break both sides. Mixing them up they would still work as long as one line and one load were connected on each side.

 

[37chief]

I am hooking up a 220 v compressor. The tank pressure control switch has two sets of double contacts. Two are marked (line load). The other two are marked (load line) Should the 220 v power in , go to the line load?

This is just how it is labeled. This is why I am a little confused. I always hooked up the supply voltage it the marked (line) Stan

 

[John T]

In all my years of practice and even when a non professional amateur I considered Line as the hot incoming Supply voltage source and Load as the tool/appliance/motor that got switched activated when the relay toggled.

Also when using 240 volt appliances BOTH L1 and L2 were switched even though only one would stop operation

I doubt that has changed and it appears other electricians agree

John T

 

[john in la]

I think you are confusing the words or reading them together.
The switch is marked
Line Load Load Line.
This is saying the line power in goes to the first screw
The load wire power to motor goes to second screw
The load wire power to the motor goes to the third screw
And line power goes to the forth screw.

Line is power in from your breaker box.
Load is power to the motor.

This is a very common way to wire this type switch with the motor hooked to the two center screws and the power in from fuse box to the two outside screws.

 

[Hemmjo]

It is just a switch, you can look at the contacts and know how to connect the wires.