Romex for a pool moter - please respond

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steelersman said:
wouldn't the pvc protect the ground from corrosive chlorine?
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absolutely not. i changed a pump out last week that was in a building full of chlorine gas. the original installer had stripped 12-3 romex (7.5HP wye motor) and run it through PVC. I honest to God thought it was an insulated ground until I grabbed it and all the green came off.
 
I looked at the JPG that Stickboy posted, and it seems to me it's flawed - am I missing something? It says the equipment grouding conductor must be insulated, but then at the bottom it says NM is acceptable. Since when does NM have and insulated ground?
 
bjp_ne_elec said:
I looked at the JPG that Stickboy posted, and it seems to me it's flawed - am I missing something? It says the equipment grouding conductor must be insulated, but then at the bottom it says NM is acceptable. Since when does NM have and insulated ground?
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It's a little confusing because that is what the text at the top says. But read the text in the box at the bottom of the illustration.
 
Wouldn't the ground wire in a cable assembly like NM-B or UF be considered insulated by the outer non metallic jacket that surrounds the conductors? IMO, that is why it is allowed per Stickboys' graphic.
 
A/A Fuel GTX said:
Wouldn't the ground wire in a cable assembly like NM-B or UF be considered insulated by the outer non metallic jacket that surrounds the conductors? IMO, that is why it is allowed per Stickboys' graphic.
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No, inside a jacket or sheath qualifies as 'covered,' but not 'insulated.'
 
LarryFine said:
No, inside a jacket or sheath qualifies as 'covered,' but not 'insulated.'
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So what justifies the legality of the graphic showing a pool motor fed with non metallic sheathed cable?????
 
A/A Fuel GTX said:
So what justifies the legality of the graphic showing a pool motor fed with non metallic sheathed cable?????
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The graphic shows nm cable only in the interior of the dwelling. The top caption says "insulated ground" and they are talking about the exterior of the house in that caption. The graphic is a little confusing.
 
j_erickson said:
The graphic shows nm cable only in the interior of the dwelling. The top caption says "insulated ground" and they are talking about the exterior of the house in that caption. The graphic is a little confusing.
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I agree the graphic is correct since the arrow is pointing to the portion of the wiring on the outside of the one-family dwelling with the statement that an insulated EGC is required. For the wiring on the interior of a one-family dwelling any recognized chapter 3 wiring method that complies will all of 680.21(A)(4) shall be permitted. This included NM on the interior of the one-family dwelling.
 
brantmacga said:
I honest to God thought it was an insulated ground until I grabbed it and all the green came off.
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So that's why we use green for EGC's. Insulated or not, it ends up green. :grin: <---- (appropriately-colored smilie)
 
The drawing is really confusing, as the caption at the bottom really would imply that the three cable types, which have uninsulated grounds (like it says) can be used (in the authors words "are permitted" - and I don't think they're referring back to the NM running in the interior).
 
bjp_ne_elec said:
The drawing is really confusing, as the caption at the bottom really would imply that the three cable types, which have uninsulated grounds (like it says) can be used (in the authors words "are permitted" - and I don't think they're referring back to the NM running in the interior).
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I guess who ever drew the graphic figured someone would actually read the NEC and not learn the code by pictures? The graphic is fine if you've read the NEC section they are describing.
 
Stickboy - I realize that, and it clearly states EGC must be insulated - which it is not in NM - but some guys go to the Handbook for "clarification". This particular figure wouldn't do that for those who look to it for this purpose.
 
bjp_ne_elec said:
Stickboy - I realize that, and it clearly states EGC must be insulated - which it is not in NM - but some guys go to the Handbook for "clarification". This particular figure wouldn't do that for those who look to it for this purpose.
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The only thing wrong with the graphic IMO, is that 2nd arrow pointing at the carflex/sealtite going to the pump... that needs to be removed.
 
petersonra said:
What is the purpose of requiring an insulated ground wire anyway?
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For all the Hippies installing pools, an attempt to idiot proof the prohibition of Romex type NM cable near pool equipment?

As more Hippies pre-dominate special occupancies and equipment, including Solar installs, it will not surprise me if Articles 680 & 690 are moved exclusively under engineering supervision.
 
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