680-40 regarding outdoor spas refers back to 680 Parts A & B. 680-25(d) states that panelboards and disconnects when installed (and 680-12 requires that one always be installed) must have EGC that is insulated and installed in a choice of raceways. On the interior of a building, ENT(smurf tube) is acceptable. There is no exception as in 680-25(c),Motors, that would allow NM cable,(one of the wiring methods in Chap.3)to be used inside a one-family dwelling however, I repeatedly see this installed on the inside portion of the ckt. Thoughts?
David, I am aware that 680-25(c) allows NM for motors. I am referring to 680-25(d)which also mentions disconnects along with panelboards. I see no reason to allow NM on the interior of a building to feed the disconnect required by 680-12.
This is no particular installation. I have seen a few like this. They are new Spas with disconnects mounted nearby, as required. NM cable feeds the disco, then PVC conduit goes on to feed the spa. I believe that 680-25(d)requires a raceway with an insulated ground to feed and ground the disconnect, even though it is fed from the inside of residences.
Re: NM Cable feeding outdoor Spa Disconnect#77111 04/26/0107:43 AM04/26/0107:43 AM
Originally posted by Glenn: Redsy, on your post of 04-25-2001 03:09PM,
- - - 680-25(c) allows NM for motors - -.
I do not read the first paragraph of 250-25(c) to allow NM to the motor.
In general, I read 680-25 to allow an EXISTING installation using from service to a sub-panel when with-in the building.
But, to the motor under ANY condition, the EGC is to be INSULATED and in ONE OF THE RACEWAYS (or type MC cable) LISTED IN 680-25(c) ist paragraph. NM is not one of that list.
Glenn, The last paragraph of 680-25(c) allows an insulated OR covered ground, including any Chapt. 3 wiring method, for pool motors on the interior of a one-family dwelling. No such allowance exists in 680-25(d) regarding panelboards or disconnects. That was my original point. (Why do I see so many spa disconnects fed with NM cable? Seems like a violation to me.)