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PVC rigid conduit Schedule 40 and Schedule 80 (NEMA TC 2 / UL 651): trade size, OD, minimum wall, minimum average ID, 1/2 to 8 in + 100 mm sections

What are the OD and minimum wall of Schedule 40 and Schedule 80 PVC conduit (1/2 to 6 in)? · Standard part · basis: Wheatland Tube's PVC conduit spec sheet (Sch 40 and 80, 1/2 to 4 in) and Atkore's Sch 40 spec (1/2 to 8 in) agree on OD, minimum wall and minimum average ID; walls for 6 and 8 in Sch 80 are from a PVC conduit manufacturer's page

Also called: schedule 40 pvc conduit od, 1 inch pvc conduit outside diameter, 2 inch pvc conduit od, schedule 80 pvc conduit wall, pvc conduit 3 inch od, pvc conduit trade size chart, 1/2 pvc conduit od, 4 inch pvc conduit od wall, nema tc 2 conduit dimensions, sch 80 pvc conduit 1 inch wall, pvc conduit id sch 40 2 inch, pvc conduit 6 inch od, ul 651 conduit sizes

Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features

length
168.27 mm
width
168.27 mm
height
100.0 mm

Notes

  • PVC rigid conduit is made to the same trade sizes and outside diameters as PVC and steel pipe, so a Schedule 40 or 80 PVC conduit has the OD of the matching NPS pipe (1/2 in 0.840, 3/4 in 1.050, 1 in 1.315, 1-1/4 in 1.660, 1-1/2 in 1.900, 2 in 2.375, 2-1/2 in 2.875, 3 in 3.500, 3-1/2 in 4.000, 4 in 4.500, 5 in 5.563, 6 in 6.625, 8 in 8.625). Wheatland's sheet cites UL 651 and lists NEMA TC 2 and ASTM 1784 among its standards; Atkore's names UL 651, which does not include the 8 in size (as Atkore says). The standards themselves were not read; the numbers are the two makers' sheets.
  • Walls are minimum walls and the IDs are minimum average IDs, not nominal: ID = OD − 2 × minimum wall (shown separately, the last numeric column) is larger than the printed minimum average ID (for example 1/2 in Sch 40: 0.622 against 0.578 in), because the OD and wall tolerances are applied. Wheatland and Atkore print identical Schedule 40 numbers for 1/2 to 4 in; Atkore adds 5 in (OD 5.563, wall 0.258, ID 4.975), 6 in (6.625, 0.280, 5.986) and 8 in (8.625, 0.322, 7.853).
  • Schedule 80 (heavier wall, same OD): Wheatland prints 1/2 to 4 in; its minimum average ID for 3-1/2 in (3.820) is larger than the one for 4 in (3.737) and than OD − 2 × wall (3.364), so it is almost certainly a typo and is left blank here. 6 and 8 in Sch 80 walls (0.432, 0.500) are from a PVC conduit manufacturer's page, a second source for the other Sch 80 walls (equal at every size that page lists: 1/2, 3/4, 1, 1-1/4, 1-1/2, 2, 3 and 4 in); that page's ID columns (for example 0.824 in for 3/4 in Sch 40, against Wheatland and Atkore's 0.780) are different quantities and are not used. No Sch 80 data for 5 in was read.
  • Not covered: Type EB and DB (encased burial / direct burial) conduit, fittings (sockets, elbows), and the PVC pipe tables, which are on pvc-schedule-40-80-pipe-od-and-wall and schedule-40-pipe (1/2 to 2 in Sch 40 pipe sections). Steel conduit: rigid-imc-emt-conduit-sizes-to-4-in and emt-conduit; flexible and liquid-tight metal conduit: flexible-metal-conduit-fmc-lfmc-trade-sizes.
  • Files: 100 mm hollow sections at the average OD and the minimum wall: Schedule 40 for 2-1/2, 3, 3-1/2, 4, 5 and 6 in (1/2 to 2 in Schedule 40 is on schedule-40-pipe) and Schedule 80 for 1/2 to 4 in. The length is Xem's example length; actual conduit ID varies with the tolerances above.

PVC rigid conduit Schedule 40 and Schedule 80 (NEMA TC 2 / UL 651)… size chart

scheduletrade size, inaverage OD, inOD, mmminimum wall, inminimum wall, mmmin. average ID, inmin. average ID, mmOD − 2 × min. wall, in
Schedule 401/20.84021.340.1092.770.57814.680.622
Schedule 403/41.05026.670.1132.870.78019.810.824
Schedule 4011.31533.400.1333.381.00425.501.049
Schedule 401-1/41.66042.160.1403.561.33533.911.380
Schedule 401-1/21.90048.260.1453.681.56439.731.610
Schedule 4022.37560.330.1543.912.02151.332.067
Schedule 402-1/22.87573.030.2035.162.41461.322.469
Schedule 4033.50088.900.2165.493.00876.403.068
Schedule 403-1/24.000101.600.2265.743.48688.543.548
Schedule 4044.500114.300.2376.023.961100.614.026
Schedule 4055.563141.300.2586.554.975126.375.047
Schedule 4066.625168.280.2807.115.986152.046.065
Schedule 4088.625219.080.3228.187.853199.477.981
Schedule 801/20.84021.340.1473.730.50212.750.546
Schedule 803/41.05026.670.1543.910.60815.440.742
Schedule 8011.31533.400.1794.550.91023.110.957
Schedule 801-1/41.66042.160.1914.851.22731.171.278
Schedule 801-1/21.90048.260.2005.081.44636.731.500
Schedule 8022.37560.330.2185.541.88147.781.939
Schedule 802-1/22.87573.030.2767.012.25057.152.323
Schedule 8033.50088.900.3007.622.82071.632.900
Schedule 803-1/24.000101.600.3188.08——3.364
Schedule 8044.500114.300.3378.563.73794.923.826
Schedule 8066.625168.280.43210.97——5.761
Schedule 8088.625219.080.50012.70——7.625

Mating features

Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.

featureexactmates withfitfiles
conduit ODSch 40: 2-1/2 in 73.03, 3 in 88.90, 3-1/2 in 101.60, 4 in 114.30, 5 in 141.30, 6 in 168.28 mm; Sch 80: 1/2 in 21.34, 3/4 in 26.67, 1 in 33.40, 1-1/4 in 42.16, 1-1/2 in 48.26, 2 in 60.33, 2-1/2 in 73.03, 3 in 88.90, 3-1/2 in 101.60, 4 in 114.30 mm (average OD)socket of a PVC conduit coupling or fitting, the same OD as PVC pipe (schedule-40-pipe, pvc-schedule-40-fittings-laying-lengths); the socket bore is the OD plus your solvent-cement clearancesocketpvc-conduit-*

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Wheatland TubePVC conduit specifications: Schedule 40 and Schedule 80, 1/2 to 4 in: average OD, minimum wall, minimum average IDwebMaker spec sheet; numbers only
AtkorePVC rigid Schedule 40 conduit (spec ATCE-SPEC-6709-2402): average OD, minimum wall, ID, 1/2 to 8 inwebDistributor-hosted maker spec; numbers only
PVC conduit manufacturer (pvcconduitmanufacturer.com)PVC electrical conduit sizes: OD, Schedule 40 / 80 minimum wall and average ID, 1/2 to 8 inwebMaker page; numbers only. Its ID columns differ from the Wheatland / Atkore sheets and are not used

Free files

★ Free files 16 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

pvc-conduit-sch40-2-1-2in-100mmPVC conduit Schedule 40, trade size 2-1/2 in: average OD and minimum wall: OD Ø73.03, wall 5.156, bore Ø62.71, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch40-3in-100mmPVC conduit Schedule 40, trade size 3 in: average OD and minimum wall: OD Ø88.90, wall 5.486, bore Ø77.93, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch40-3-1-2in-100mmPVC conduit Schedule 40, trade size 3-1/2 in: average OD and minimum wall: OD Ø101.60, wall 5.740, bore Ø90.12, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch40-4in-100mmPVC conduit Schedule 40, trade size 4 in: average OD and minimum wall: OD Ø114.30, wall 6.020, bore Ø102.26, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch40-5in-100mmPVC conduit Schedule 40, trade size 5 in: average OD and minimum wall: OD Ø141.30, wall 6.553, bore Ø128.19, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch40-6in-100mmPVC conduit Schedule 40, trade size 6 in: average OD and minimum wall: OD Ø168.28, wall 7.112, bore Ø154.05, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch80-1-2in-100mmPVC conduit Schedule 80, trade size 1/2 in: average OD and minimum wall: OD Ø21.34, wall 3.734, bore Ø13.87, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch80-3-4in-100mmPVC conduit Schedule 80, trade size 3/4 in: average OD and minimum wall: OD Ø26.67, wall 3.912, bore Ø18.85, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch80-1in-100mmPVC conduit Schedule 80, trade size 1 in: average OD and minimum wall: OD Ø33.40, wall 4.547, bore Ø24.31, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch80-1-1-4in-100mmPVC conduit Schedule 80, trade size 1-1/4 in: average OD and minimum wall: OD Ø42.16, wall 4.851, bore Ø32.46, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch80-1-1-2in-100mmPVC conduit Schedule 80, trade size 1-1/2 in: average OD and minimum wall: OD Ø48.26, wall 5.080, bore Ø38.10, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch80-2in-100mmPVC conduit Schedule 80, trade size 2 in: average OD and minimum wall: OD Ø60.33, wall 5.537, bore Ø49.25, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch80-2-1-2in-100mmPVC conduit Schedule 80, trade size 2-1/2 in: average OD and minimum wall: OD Ø73.03, wall 7.010, bore Ø59.00, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch80-3in-100mmPVC conduit Schedule 80, trade size 3 in: average OD and minimum wall: OD Ø88.90, wall 7.620, bore Ø73.66, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch80-3-1-2in-100mmPVC conduit Schedule 80, trade size 3-1/2 in: average OD and minimum wall: OD Ø101.60, wall 8.077, bore Ø85.45, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
pvc-conduit-sch80-4in-100mmPVC conduit Schedule 80, trade size 4 in: average OD and minimum wall: OD Ø114.30, wall 8.560, bore Ø97.18, 100 mm long (Xem's example length; cut to the length you need); plain hollow section, no ends, seam or finishSTEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=pvc-rigid-conduit-sch-40-80-nema-tc-2

PVC rigid conduit Schedule 40 and Schedule 80 (NEMA TC 2 / UL 651): trade size, OD, minimum wall, minimum average ID, 1/2 to 8 in + 100 mm sections, isometric render of a generated part
Render of pvc-conduit-sch80-1in-100mm from the free STEP; not to scale.

Fits with

OD
PVC Schedule 40 and Schedule 80 pipe: OD, minimum wall and ID, 1/2 to 4 in9 sizes★ sheet
Schedule 40 pipe and PVC fittings, 1/2 to 2 inch, isometric render of a generated part
Schedule 40 pipe and PVC fittings, 1/2 to 2 inch6 sizes★ 6 files
Rigid (RMC), IMC and EMT conduit sizes to 4 in: outside diameter, wall and inside diameter by trade size, inches and mm26 sizes★ sheet
EMT conduit sizes: 1/2 to 2 in OD and wall (ANSI C80.3), isometric render of a generated part
EMT conduit sizes: 1/2 to 2 in OD and wall (ANSI C80.3)6 sizes★ 24 files
length
Flexible metal conduit sizes: FMC (reduced-wall 'greenfield') and liquid-tight LFMC, 3/8 to 4 in: ID and OD ranges, metric designators35 sizes★ sheet
Conduit knockout diameters (NEMA Bulletin 71): 1/2 to 6 in trade sizes, minimum, nominal and maximum, with bushing and locknut diameters + hole gauge plates, isometric render of a generated part
Conduit knockout diameters (NEMA Bulletin 71): 1/2 to 6 in trade sizes, minimum, nominal and maximum, with bushing and locknut diameters + hole gauge plates298.5×78.7×3.0 mm★ 3 files
length
US metal handy box and 4 in square box: size, depth, cubic inches, cover ears10 sizes★ sheet

Questions

What is the OD of 1 inch PVC conduit?

1.315 in (33.40 mm) for Schedule 40 and Schedule 80; the minimum wall is 0.133 in (Sch 40) and 0.179 in (Sch 80).

What is the difference between Schedule 40 and 80 PVC conduit?

Same OD; Schedule 80 has the thicker wall: at 2 in 0.218 against 0.154 in.

What is the OD of 4 inch PVC conduit?

4.500 in (114.30 mm); minimum wall 0.237 in (Sch 40) or 0.337 in (Sch 80).