What level of resistance(ohm value)is acceptable when measuring between the metal objects in and around a swimming pool and the cold water line to which the objects are bonded? I've been asked to evaluate the integrity of a bonding conductor that is attached at the service entrance of a 12" domestic cold water pipe at a large school. The pipe and bonding conductor are located inside a storage room which, at one time, housed liquid chlorine. As one would expect, the bonding conductor has deteriorated over the past 25 years and the integrity of the bond is now in question. What is the best method for determining whether the bond is still adequate? It is unknown exactly where the opposite end of the bonding conductor is connected to the swimming pool but is assumed to be connected to the re-bar or other metal in or around the pool. Any advice would be greatly appreciated!
Swimming Pool Bonding Conductor
- Thread starter jrturner
- Start date
- Status
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: Swimming Pool Bonding Conductor
See the FPN to 680.26
Re: Swimming Pool Bonding Conductor
ryan:
Thank you for pionting out the FPN.
I never noticed that it just stated that running the bond back to the service or water main is only "not required" as oppossed to shall not be run back to the service or water main.
While some feel that running the bond back to the service or water main is added safety, others feel quite the opposite that it actually introduces a potential hazard.
ryan:
Thank you for pionting out the FPN.
I never noticed that it just stated that running the bond back to the service or water main is only "not required" as oppossed to shall not be run back to the service or water main.
While some feel that running the bond back to the service or water main is added safety, others feel quite the opposite that it actually introduces a potential hazard.
pierre
Senior Member
- Location
- Westchester County, New York
Re: Swimming Pool Bonding Conductor
Bonding at pools is to create an 'equipotential grid' to eliminate the voltage gradient in the pool area. 680.26(B)(4) reqiures in some fashion for this equipotential grid to be bonded to the electrical system of the premise wiring. I do not see why this is necessary. To protect against a voltage gradient should (IMO) not require connection to the premise wiring system.
Pierre
Bonding at pools is to create an 'equipotential grid' to eliminate the voltage gradient in the pool area. 680.26(B)(4) reqiures in some fashion for this equipotential grid to be bonded to the electrical system of the premise wiring. I do not see why this is necessary. To protect against a voltage gradient should (IMO) not require connection to the premise wiring system.
Pierre
charlie
Senior Member
- Location
- Indianapolis
Re: Swimming Pool Bonding Conductor
Pierre, if you are going to have electric stuff in the vicinity of the pool, they have to be grounded to the electrical system. If they are close to the pool, there will be a difference between the circuit grounding and the equipotential plane. That could be a shock hazard with small, wet feet around. In other words, bond them together to get rid of any voltage differences. This is the same reason to bond all metallic objects within 5 feet of the pool.
Pierre, if you are going to have electric stuff in the vicinity of the pool, they have to be grounded to the electrical system. If they are close to the pool, there will be a difference between the circuit grounding and the equipotential plane. That could be a shock hazard with small, wet feet around. In other words, bond them together to get rid of any voltage differences. This is the same reason to bond all metallic objects within 5 feet of the pool.
- Status