StumbleMyMirth
New User
- Location
- NY
- Occupation
- Engineer
Hi,
Question as relates to bonding while replacing a gas-fired pool heater with a heat pump.
Inground, 30+ year old fiberglass/hybrid pool surrounded by concrete with a light niche and metal ladder/railing and plastic coping. Equipment is further than 5' away.
No evidence can be found of the existence of an equipotential bonding grid.
The bonding lug on the pre-existing gas heater (installed 2007) is apparently connected to the main service ground and the pump motor's bonding lug is empty. Both have dedicated, insulated EGC's alongside their CCCs. The light niche metal ring shows continuity to service ground, but the water, ladder/handrails and light ring show no continuity between each other (or to service ground, with the exception of the light ring) which to me is more evidence nothing was ever bonded (unless it's all corroded away below the surface)
What to do? Bond the existing pump motor and heat pump to each other and call it a day? Leave all bonding lugs disconnected or bond them to service ground as is already the case with the pre-existing gas heater? (bonding to service ground almost feels worse than no bonding at all) Or must the concrete be cut up to run a #8 bare copper around the perimeter? What if light niche is permanently disconnected and ladders/handles replaced with non-metallic?
FWIW this is not for a customer's pool it's for my own in a new to me house.
Thanks!
Question as relates to bonding while replacing a gas-fired pool heater with a heat pump.
Inground, 30+ year old fiberglass/hybrid pool surrounded by concrete with a light niche and metal ladder/railing and plastic coping. Equipment is further than 5' away.
No evidence can be found of the existence of an equipotential bonding grid.
The bonding lug on the pre-existing gas heater (installed 2007) is apparently connected to the main service ground and the pump motor's bonding lug is empty. Both have dedicated, insulated EGC's alongside their CCCs. The light niche metal ring shows continuity to service ground, but the water, ladder/handrails and light ring show no continuity between each other (or to service ground, with the exception of the light ring) which to me is more evidence nothing was ever bonded (unless it's all corroded away below the surface)
What to do? Bond the existing pump motor and heat pump to each other and call it a day? Leave all bonding lugs disconnected or bond them to service ground as is already the case with the pre-existing gas heater? (bonding to service ground almost feels worse than no bonding at all) Or must the concrete be cut up to run a #8 bare copper around the perimeter? What if light niche is permanently disconnected and ladders/handles replaced with non-metallic?
FWIW this is not for a customer's pool it's for my own in a new to me house.
Thanks!
