Pool bond
Posted: Mon Jan 27, 2014 10:59 pmHey Jerry,
you posted the comment below a while back. I was wondering if you have the actual book it came from, 1965-68? I was interested in see the actual code as it was written. if not no big deal, just thought id ask.
680-7. Grounding
- (a) All metallic conduit, piping systems, pool reinforcing steel, light fixtures, and the like, shall be bonded together and grounded to a common ground. The metal parts of ladders, diving boards, and their support, shall be grounded.
- (b) No pool equipment shall be grounded to an external grounding electrode that is not common to the pool ground (deck box or transformer enclosure).
- (c) An unbroken No. 14 AWG, or larger, insulated copper wire shall be provided for a grounding conductor from the deck box to the distribution panel ground.
- (d) Metallic raceways shall not be depended upon for grounding. Where exposed to pool water and in other corrosive areas such as in pump houses or adjacent to water treating and other equipment, the grounding of the non-current carrying parts shall be by means of an insulated copper conductor sized in accordance with Section 250-95.
The 1965 NEC was similar, expanded with some changes, and the grounding/bonding conductor went to a No. 8 AWG. There were other changes as well.
In the 1968 NEC the grounding/bonding changed to bonding and that is when the 5 feet horizontally of the pool water first came in.
You could say that pool bonding first came into the NEC in 1962, and that bonding as we know it today came into the NEC in 1968, albeit in a much simpler form. Equipotential bonding has continued to improve and change throughout the various code cycles since.
you posted the comment below a while back. I was wondering if you have the actual book it came from, 1965-68? I was interested in see the actual code as it was written. if not no big deal, just thought id ask.
680-7. Grounding
- (a) All metallic conduit, piping systems, pool reinforcing steel, light fixtures, and the like, shall be bonded together and grounded to a common ground. The metal parts of ladders, diving boards, and their support, shall be grounded.
- (b) No pool equipment shall be grounded to an external grounding electrode that is not common to the pool ground (deck box or transformer enclosure).
- (c) An unbroken No. 14 AWG, or larger, insulated copper wire shall be provided for a grounding conductor from the deck box to the distribution panel ground.
- (d) Metallic raceways shall not be depended upon for grounding. Where exposed to pool water and in other corrosive areas such as in pump houses or adjacent to water treating and other equipment, the grounding of the non-current carrying parts shall be by means of an insulated copper conductor sized in accordance with Section 250-95.
The 1965 NEC was similar, expanded with some changes, and the grounding/bonding conductor went to a No. 8 AWG. There were other changes as well.
In the 1968 NEC the grounding/bonding changed to bonding and that is when the 5 feet horizontally of the pool water first came in.
You could say that pool bonding first came into the NEC in 1962, and that bonding as we know it today came into the NEC in 1968, albeit in a much simpler form. Equipotential bonding has continued to improve and change throughout the various code cycles since.