Rigid PVC Conduit Annex C 2017 NEC

[goldstar]

Can anyone explain the differences between these types of PVC conduits ?

C.10 — Rigid PVC Conduit, Schedule 80
C.10(A)* — Rigid PVC Conduit, Schedule 80
C.11 — Rigid PVC Conduit, Schedule 40 and HDPE Conduit
C.11(A)* — Rigid PVC Conduit, Schedule 40 and HDPE Conduit
C.12 — Type A, Rigid PVC Conduit
C.12(A)* — Type A, Rigid PVC Conduit
C.13 — Type EB, PVC Conduit
C.13(A)* — Type EB, PVC Conduit

I was asked by one of my colleagues which type would be approved for use in direct burial in cement.

Thanks in advance

 

[LarryFine]

Not sure what Types A and EB are, but I can tell you Schedule 80 has a thicker wall than Schedule 40.

In cement, I see PVC basically as a stay-in-place form, so I'd go with regular Schedule 40 PVC conduit.

 

[acin]

352 10 G

 

[jusme123]

Type EB and A conduit and fittings
1.3.1 The Type EB and Type A rigid PVC conduit and fittings mentioned in 1.1.1 are intended for use at 50°C (122°F) and lower ambient temperatures. Type A rigid PVC conduit and fittings are intended for use with 75°C (167°F) wiring. Type A and Type EB rigid PVC conduit and fittings, where encased in concrete in trenches outside of buildings, may be used with 90°C (194°F) wiring.

1.3.2 Type EB (encased burial) rigid PVC conduit is intended for encasement in concrete in trenches outside of buildings. Type A rigid PVC conduit is intended for encasement in concrete in any location.

UL 651 | UL Standards & Engagement | UL Standard

UL 651 | UL Standards & Engagement | UL Standard | Edition 8 | Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings | Published Date: October 25, 2011 | ANSI Approved: May 10, 2022

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