I bought a new Pentair pool light. It came with an extra pilot screw in a bag that reads as follows (typos included): "This extra Stainless Steel pilot screw has been provided for use on new pool contruction only. When replacing a light fixture in an existing niche. you must use the Bronze pilot screw that is supplied with the light fixture. The pilot screw is a key component of the grounding path for this light fixture. To maintain the electrical connection. always use the correct pilot screw and tighten securely." As part of my renovation, my PB installed the light for me after replacing the pool light niche, conduit, and electrical box. They used the existing brass screw that was on the old niche. When I showed them this extra screw that came with the light and asked them if they should have used this new Stainless Steel screw they just shrugged and said they always use a brass screw. My two part question is:
- Should they have used the new stainless steel screw since the new light went into a new niche?
- What is the technical explanation for when a brass vs. stainless steel pilot screw is needed to ensure the grounding path is correct?
