We run PVC underground but typically transition to RMC starting at the 90 bend underground, up out of the ground, and to a box or conduit body where we then transition to EMT.
August Luminalt *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *AE Solar *Sent:* Sunday, October 30, 2016 4:25 AM *To:* RE-wrenches *Subject:* Re: [RE-wrenches] Conduit in a slab Thanks Allan, I agree the PVC is better for corrosion, but if I sweep up with PVC I will be running DC in PVC inside the house for however many inches it takes to convert to EMT...which is a part I'm not sure about. On Sunday, October 30, 2016, Allan Sindelar <al...@sindelarsolar.com> wrote: Adam, Over time earth can be corrosive to metal, which is why good practice here is to use PVC below grade and transition to EMT once the conduit is exposed above grade. I suspect that concrete would have similar effects. In New Mexico, state Code requires Schedule 80 if PVC is used above grade, I suspect primarily because of the intensity of our high-elevation sun, so by that logic you'd use a Sch. 80 90 sweep to exit the slab, then transition. Allan *Allan Sindelar* al...@sindelarsolar.com <javascript:_e(%7B%7D,'cvml','al...@sindelarsolar.com');> NABCEP Certified PV Installation Professional NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Founder (Retired), Positive Energy, Inc. *505 780-2738 cell* On 10/29/2016 6:50 PM, AE Solar wrote: Wrenches, I have a project where the DC run is going through the wall system of the house, down through the slab, out the building underground and into another building. My preference would be to run PVC in the slab and then stub out of it with a metal 90. I'm unclear if that is allowed. Is conduit in the slab considered to be inside the house and therefore should be metal? Thanks for any thoughts. Adam _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org <javascript:_e(%7B%7D,'cvml','RE-wrenches@lists.re-wrenches.org');> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org -- Adam Katzman Autonomous Energies PO Box 1245 Kingston, NY 12402 www.autonomousenergies.com (518) 567-1468
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