what is the third wire for on a set of spot lieghts we are trying to install?

Answer 1

the red one?
its used if you want to put more than one spot (dif locations) on together.you put a 2wire between them

Answer 2

This could be one of a few things:
1. If the wires are colored red, black, and white; and your spotlight is equipped with a motion sensor, then the red gets hooked up to the black feed. the Black should already be hooked up to the motion sensor.
2. If there are two black wires and one white wire, then both black wires get connected to the black feed, as they are the feeds for the individual lights.
3. If the third wire is green or bare copper, then it is the ground and should be connected to the ground coming from the source, which should also be attached by a screw to the body of the mounting box (if metal).

I hope that it is one of these configurations, as they are the most common found in security lighting. Take it from me, I am an electrician.

Answer 3

Probably a ground wire. Prevents shocks

Answer 4

What color is the wire?? Bare copper is for grounding to receptacle housing. Black is for Voltage. White is for Ground or neutral. Red is for Voltage of a 3 wire conductor. Green is for ground to the receptacle housing.

Answer 5

Power take off
Warning light
Auxilliary accessory

Jules. Auto Tech and Lecturer.

Answer 6

wow lot of morons answering this well heres what i would say if you have 3 wires it could be becouse you have a fog lap and a driving lap like a doul pourpose lamp or it could be a jumper to another light but what i wuld do is upen it up and see where it conects probably a doul filement bulb

Answer 7

Perhaps it's the ground wire?

Answer 8

THIS IS THE GROUND WIRE THIS NEEDS TO BE ATTACHED AND GROUNDED SO THAT THE LIGHTS DONOT BLOW ANOTHER FUSE AND BULB