Michael Kennedy
Member
In the post... "Grounding Vs. Bonding" it is pointed out that ?grounding is a connection to earth and bonding is the connection of items to each other?. It has been clearly stated by many contributors to this forum and hundreds of articles written else where that equipotential bonding has nothing to do with earth and I recognize the reason behind it.
Mike Holt has provided a .pdf free download of Article 680 which is in regard to the installations of swimming pools.
http://www.mikeholt.com/files/PDF/Pooldownload.pdf
My first question is why in Article 680 is there the continuous use of the words ?equipment grounding (bonding)? ? Why not "equipment grounding" and "equipotential bonding" ?
Secondly why in Figure 680-20 of Article 680 are the green 8 AWG wires connected to the "wet-niche luminaire "light can" marked as ?to equpotential bonding grid? connected to the junction box and then on to transformer box and panelboard where it is marked as ?grounding (bonding) conductor? ? Also if one were to use a copper or brass conduit from the light can (as many are made) to the metal junction box ?(deck box)? as required by Article 680.24 (A) (2) and the metal light box is tied to the rebar in the pool as required by Article 680 as part of the equipotential bonding requirements you have tied the ?grounding (bonding) conductor and equipotential bonding together. It is stated in 680.24 (A) (3) that this metal junction box will be ?provided with electrical continuity between all metal conduit and the grounding (bonding) terminal within the junction box.?. Also if one were to run the metal conduit from the light can directly to an approved swimming pool GFCI enclosure (see 680.24 (B) (4) you would have the same result. In addition the brass conduit connected to the metal GFCI enclosure is buried in the earth and tied to the light can and rebar in the pool so makes for a nice grounding rod in itself and yet these are parts of the equipotential bonding loop?
Could you please explain this to me as I must be missing something?
For convenience use the link below to quickly get to Mike Holt?s .pdf free download of Article 680. The Figure 680-20 is on page 23 of the .pdf file.
Thank you,
Michael Kennedy
Mike Holt has provided a .pdf free download of Article 680 which is in regard to the installations of swimming pools.
http://www.mikeholt.com/files/PDF/Pooldownload.pdf
My first question is why in Article 680 is there the continuous use of the words ?equipment grounding (bonding)? ? Why not "equipment grounding" and "equipotential bonding" ?
Secondly why in Figure 680-20 of Article 680 are the green 8 AWG wires connected to the "wet-niche luminaire "light can" marked as ?to equpotential bonding grid? connected to the junction box and then on to transformer box and panelboard where it is marked as ?grounding (bonding) conductor? ? Also if one were to use a copper or brass conduit from the light can (as many are made) to the metal junction box ?(deck box)? as required by Article 680.24 (A) (2) and the metal light box is tied to the rebar in the pool as required by Article 680 as part of the equipotential bonding requirements you have tied the ?grounding (bonding) conductor and equipotential bonding together. It is stated in 680.24 (A) (3) that this metal junction box will be ?provided with electrical continuity between all metal conduit and the grounding (bonding) terminal within the junction box.?. Also if one were to run the metal conduit from the light can directly to an approved swimming pool GFCI enclosure (see 680.24 (B) (4) you would have the same result. In addition the brass conduit connected to the metal GFCI enclosure is buried in the earth and tied to the light can and rebar in the pool so makes for a nice grounding rod in itself and yet these are parts of the equipotential bonding loop?
Could you please explain this to me as I must be missing something?
For convenience use the link below to quickly get to Mike Holt?s .pdf free download of Article 680. The Figure 680-20 is on page 23 of the .pdf file.
Thank you,
Michael Kennedy