How to test dimmers and switches without installing

[RussellB]

Hi,

I thought I read somewhere I could bench test controllers by plugging them into an extension cord.  White and black wires into the cord then cord to the wall; is that correct?

TIA,

Russ

[sonic30101]

Would do ground as well but you can test the red output to the load with a voltmeter and LEDs work without installing them in a gang box if you suspect they could be bad

[RussellB]

Just confirming black and white.  I tried it once and it popped a circuit breaker!

[sonic30101]

Maybe you were using a 2 prong cord and had polarity backwards? Should probably use a 3 prong extension cord so you can use line, neutral and ground to the switch/dimmer. Most of those are colored wires inside to help. Also make sure the red is capped off and you can use a voltmeter to test it gives power when activated.

[RussellB]

Yeah I think I did.... So a three prong extension cord.  Black to the larger plug, white on the otherside and green to ground?

 

[twmoonly]

Black is the Hot wire and goes to the smaller prong, White is Neutral and goes to larger prong

[RussellB]

Thank you!