zapit480v
Member
- Location
- Grand Rapids, MI 49525
Hi,
I'm new to the site, although I have used it several times to look up information.
I found a topic related to my question but it was "closed" and I couldn't post another comment regarding it.
Here is the TITLE of the thread and below is my question.
I'm new to the site, although I have used it several times to look up information.
I found a topic related to my question but it was "closed" and I couldn't post another comment regarding it.
Here is the TITLE of the thread and below is my question.
I have wired (in my past life as an electrician) and designed at least a hundred sewage lift stations and have never been questioned by the AHJ until today.
I have a submersible pump sewage lift station wet well (CL1, DIV1 location) and an outdoor NEMA 4X control panel (CP) installed outdoors above grade approximately 5' from the wet well. Two (2) pump cable (480vac, 3-phase), level transducer cable (connect to IS barrier in CP) and back-up float cables (connected to warrick IS relays in CP). There is a seperate conduit for each pump cable, the level transducer (IS) and the floats (IS) for a total of four conduits from the wet well to the control panel. The horizontal below grade conduits from the wet well to the CP are Rigid PVC and enter the wet well 24" below grade and are converted to RMC 24" below grade to above grade for termination to the CP. Where the RMC emerges above grade I specify an XP Crouse-Hinds type GUAC conduit body on all conduits for splicing cables. Above the XP conduit body I specify an XP conduit seal. Above the XP conduit seal and into the CP they can us a standard malleable conduit body, ie. LB, jake 90.. The reason for the seal after the XP JB is to allow the maintenance personnel to change pumps, transducers or floats without having to break seals to do so.
The AHJ wants the XP conduit seal located first, above grade, as the RMC emerges from below grade ahead of the XP GUAC conduit body for cable splicing forcing maintenance personel to break the seal. My question is what is the code reference allowing me to do as I described above rather than what is described in 501.15(A)(4).
Attached is a typical elevation design, it is for a 3 pump station rather than the 2 pump station I described, but same principle.
Thanks,
zap
I have a submersible pump sewage lift station wet well (CL1, DIV1 location) and an outdoor NEMA 4X control panel (CP) installed outdoors above grade approximately 5' from the wet well. Two (2) pump cable (480vac, 3-phase), level transducer cable (connect to IS barrier in CP) and back-up float cables (connected to warrick IS relays in CP). There is a seperate conduit for each pump cable, the level transducer (IS) and the floats (IS) for a total of four conduits from the wet well to the control panel. The horizontal below grade conduits from the wet well to the CP are Rigid PVC and enter the wet well 24" below grade and are converted to RMC 24" below grade to above grade for termination to the CP. Where the RMC emerges above grade I specify an XP Crouse-Hinds type GUAC conduit body on all conduits for splicing cables. Above the XP conduit body I specify an XP conduit seal. Above the XP conduit seal and into the CP they can us a standard malleable conduit body, ie. LB, jake 90.. The reason for the seal after the XP JB is to allow the maintenance personnel to change pumps, transducers or floats without having to break seals to do so.
The AHJ wants the XP conduit seal located first, above grade, as the RMC emerges from below grade ahead of the XP GUAC conduit body for cable splicing forcing maintenance personel to break the seal. My question is what is the code reference allowing me to do as I described above rather than what is described in 501.15(A)(4).
Attached is a typical elevation design, it is for a 3 pump station rather than the 2 pump station I described, but same principle.
Thanks,
zap