Light fixture wiring question

ATX61

Bronze Supporter
Oct 4, 2020
28
Austin, TX
In process of replacing light fixture. In the junction box everything looks pretty straight forward, except there is a heavier gauge (10 I think) wire (not part of fixture wiring) coming from the niche. Connected to it with wire nut in the junction box is 3 small gauge green wires (one each from switch/GFCI/fixture). I get the fixture out and the heavy gauge wire is just floating in the niche and not connected to anything, in fact it is snipped off flush with no bare wires. I do not have my new fixture yet so I haven't seen exactly how it hooks up. What do I do with this wire? Is it supposed to be connected to the niche or fixture?
 

avspin

Gold Supporter
Jun 3, 2015
193
Reno, NV
Pool Size
18000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
It's the bonding wire and needs to be attached onside the niche not the light. It's attached to a lug that also has a bonding wire attached from the outside. You may need to find where it came off of and reattach.
here is a diagram.
Capture.JPG
 

avspin

Gold Supporter
Jun 3, 2015
193
Reno, NV
Pool Size
18000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
This thread may help
 

DLip

Gold Supporter
Sep 30, 2020
38
Jupiter, FL
Pool Size
21000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite (T-9)
If you look inside the niche do you see a bonding lug? It should attach there. After the bonding wire is attached to the lug it’s covered with a potting compound, so your lug may be covered with a blob of dark compound.
 

ATX61

Bronze Supporter
Oct 4, 2020
28
Austin, TX
Thanks for the responses, very helpful as I have never worked with pool lights before. Chipped the potting compound off the lug, cleaned corrosion off the wire and attached. I looked into reapplying potting compound but found out that it needs to be a dry application. That will have to wait until Fall when pool season is wrapping up and I have other needs to drop the pool water level. Additionally I attached an 8 gauge wire at the j box and ran it to the bonding network connected to pool/pumps/heater.