Wiring diagram uses the term "LINE" ?


Old 11-28-10, 05:31 AM
Thread Starter
Join Date: Nov 2010
Location: usa
Posts: 42
Wiring diagram uses the term "LINE" ?

I have a new timer switch and the wiring diagram uses the term "Line" which I assume is referring to the line coming from the breaker box and not the one going to the light fixture which I believe is called the "load" line. But have not heard/seen the "line" term before and would like conformation before I connect the switch.

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Old 11-28-10, 05:48 AM
Join Date: May 2010
Location: South Florida
Posts: 376
You’re correct. The line side is the source of power; load side consumes it.

Not sure how the terminology originated but line workers will often say “I’ll work the line side (meaning at the pole) and you work the load side (house connections)”.

For safety, you might want to turn off the circuit breaker (or remove the fuse) feeding this switch. Otherwise, the 'line' side will likely be hot.
Old 11-28-10, 05:51 AM
Join Date: Apr 2007
Location: Near Buffalo, NY
Posts: 4,239
Welcome to the forums.

You are correct. "Line" connects to the breaker. "Load" connects to the light or other device.

Edit: Beat me to it by three minutes, Rob!

Last edited by Rick Johnston; 11-28-10 at 05:52 AM. Reason: Add last line
Old 11-29-10, 03:01 AM
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Join Date: Nov 2010
Location: usa
Posts: 42
Thank you Rick & Rob for the answer.

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