Neutral basic theory question

J

JoeNorm

Senior Member
Location
WA
If you have a single raceway with 120v as a "power in" and "power out" to a control board and back out to a motor, would you just run one neutral wire? I am having a brain meltdown on this one.
 
JoeNorm said:
If you have a single raceway with 120v as a "power in" and "power out" to a control board and back out to a motor, would you just run one neutral wire? I am having a brain meltdown on this one.
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I'd be inclined to look at the directions.

It kind of depends on what you mean by control board.
 
JoeNorm said:
If you have a single raceway with 120v as a "power in" and "power out" to a control board and back out to a motor, would you just run one neutral wire? I am having a brain me
Click to expand...
If the switch in question is the control, one should suffice, unless the neutral current is monitored.

If it's just an SPST switch that needs no neutral, then no neutral to the switch is necessary at all.
 
It's usually specific instances that bring about broader questions.

In this case I have a gutter. From it I have one raceway that goes to a Hydronic heating system control panel. Another raceway from the gutter heads out to a pump. At the controls it has "line in" and "out to pump." The two neutral terminals on the controls are common.

Can I bring one neutral to the controls that serves as the "in" and the "out"? Or would each terminal need its own?
 
JoeNorm said:
The two neutral terminals on the controls are common.

Can I bring one neutral to the controls that serves as the "in" and the "out"?
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Yes. In this case, the second terminal is there for convenience. You need not even jumper them.
 
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