I have an inground spa connected to my pool. The light continually
trips the GFIC when the light is turned on. I know that the problem is
specific to the spa light and not the pool light because the GFIC does
not trip with the spa light leads disconnected at the junction box.
The lamp socket in the light is rusty but the interior appears to be
dry. The light is a Sta-Rite and is held in the niche by a light wedge
with a stainless steel screw through the face ring of the light.
I have obtained a Pentair light that will fit in the niche. The
pentair light has what they refer to as a "pilot screw" throught the
stainless steel face ring that warnings in the manual say is a part of
the light grounding system. The "pilot screw" apparently screws into
the Pentair niche to hold the light in the niche. The Sta-Rite niche
that is installed in my spa does not have a tab for the "pilot screw"
to screw in to. The Pac-Fab light fixture has a ground wire in the
cable just like the Sta-Rite light that is currently installed. The
niche is properly bonded.
My question is this: Can I safely use the Pentair light in the
Sta-Rite nice in my spa using the light wedge not screwing the "pilot
screw" into anything on the niche housing?