Micro switch

[wireday]

I have a air curtain for overhead door. It is supplied with 20amps 120volt. The micro/limit switch is very small trying to wire up, the micro switch only
controls the motor start relay in the air curtain, Am I allowed to use smaller wire for the micro switch? something like 14 or 16 gauge wire. I've tried the #12 wire really no room.

 

[don_resqcapt19]

Is the switch in the power circuit or the control circuit? If in the power circuit, the smallest conductor will be based on the rating of the OCPD for the circuit.

 

[wireday]

I assume its the power circuit, Its the usual hand off auto, limit switch, nothing fancy. I guess I could change the OCPD to a 15

 

[augie47]

If it's controlling a relay or starter it would be part of the control circuit and governed by Art 430 Part VI.
Have you checked for a control circuit fuse in the controller ?