Cut Sheet

Seattle City Light
MATERIAL STANDARD
Schedule 40 PVC Conduit and Fittings
standard number:
superseding:
effective date:
page:
7015.05
April 23, 2009
June 19, 2009
2 of 5
3. Industry Standards
Schedule 40 PVC conduit and fittings shall meet the
requirements of the following industry standard:
UL 651 - Standard for Schedule 40 and 80 Rigid
PVC Conduit and Fittings, 7th Edition, dated
October 4, 2005
The following clarifications apply:
Five inch (IPS) size shall meet the requirements for
specific applications, Section 4.5 (straight cut, without
couplings or adapters).
All other (IPS) sizes shall meet the requirements for
general use, Section 4.6 (one bell end).
4. Detailed Requirements
4.1 General
Conduit and fittings shall be suitable for above
ground use indoors or outdoors exposed to sunlight
and weather, and for underground use by direct
burial or encasement in concrete.
Conduit and fitting dimensions shall conform to UL
651 and the Iron Pipe Standard (IPS), where
dimensions are based on outside diameters of iron
pipe sizes.
Conduit and fitting color shall be medium to dark
gray.
Conduit and fittings shall not have any features that
can abrade or otherwise damage cable.
All conduit and elbow straight cut ends, 2 inch (IPS)
and larger, shall be chamfered according to
Figure 4.1.
Conduit, elbows, and fittings shall be designed and
manufactured to be a system intended to guarantee
complete interchangeability and compatibility
between components.
Figure 4.1
4.2 Conduit
Conduit shall be certified by Underwriters
Laboratories or NSF International as meeting the
requirements of Standard UL 651.
Manufacturer shall inform Seattle City Light in
writing of all design changes that could affect the
product's understood or published capabilities or
attributes.
Dimensional information cited in Sections 4.2, 4.3,
and 4.4 should be consistent with UL requirements
and is provided for the convenience of Seattle City
Light design engineers, construction crews,
inspectors, and quality assurance personnel who do
not have ready access to UL 651.
Table 4.2a
Stock
Number
Trade
Size,
IPS, in
End
#1
End
#2
Outside
Diameter,
Min., in
Outside
Diameter,
Average,
in
Outside
Diameter,
Max., in
Inside
Diameter,
Minimum,
Average, in
Wall
Thickness,
Min., in
Weight,
Nominal,
lbs / ft
734525 0-1/2 bell str. cut 0.832 0.840 0.848 0.578 0.109 0.16
734526 0-3/4 “ “ 1.040 1.050 1.060 0.780 0.113 0.22
734527 1 “ “ 1.305 1.315 1.325 1.004 0.133 0.32
734528 1-1/4 “ “ 1.648 1.660 1.672 1.335 0.140 0.43
734529 1-1/2 “ “ 1.888 1.900 1.912 1.564 0.145 0.52
734530 2 “ “ 2.363 2.375 2.387 2.021 0.154 0.70
734531 2-1/2 “ “ 2.860 2.875 2.890 2.414 0.203 1.11
734532 3 “ “ 3.485 3.500 3.515 3.008 0.216 1.45
734533 3-1/2 “ “ 3.950 4.000 4.050 3.486 0.226 1.74
734523 4 “ “ 4.450 4.500 4.550 3.961 0.237 2.10
734524 5 str. cut “ 5.513 5.563 5.613 4.975 0.258 2.80
010334 6 bell “ 6.575 6.625 6.675 5.986 0.280 3.63
IPS = iron pipe standard; str. = straight