2005 white book
2005 white book
RIGID NONMETALLIC SCHEDULE 40 AND
SCHEDULE 80 PVC CONDUIT (DZYR)
USE AND INSTALLATION
This category covers rigid nonmetallic PVC conduit (Schedule 40 and
Schedule 80), including straight conduit and elbows in trade sizes 1/2 to 6
(metric designators 16 to 155) inclusive, intended for installation as rigid
nonmetallic raceway for wire and cable in accordance with Article 352 of
ANSI/NFPA 70, ??National Electrical Code?? (NEC).
Schedule 40 conduit is suitable for underground use by direct burial or
encasement in concrete. Schedule 40 conduit is also suitable for aboveground
use indoors or outdoors exposed to sunlight and weather where
not subject to physical damage.
Schedule 80 conduit has a reduced cross-sectional area available for wiring
space and is suitable for use wherever Schedule 40 conduit may be
used. The marking ??Schedule 80 PVC?? identifies conduit suitable for use
where exposed to physical damage and for installation on poles in accordance
with the NEC.
Unless marked for higher temperature, rigid nonmetallic conduit is
intended for use with wire rated 75?C or less including where it is
encased in concrete within buildings and where ambient temperature is
50?C or less. Where encased in concrete in trenches outside of buildings it
is suitable for use with wires rated 90?C or less.
Listed PVC conduit is inherently resistant to atmosphere containing
common industrial corrosive agents and will also withstand vapors or
mist of caustic, pickling acids, plating bath and hydrofluoric and chromic
acids.
PVC conduit and elbows (including couplings) that have been investigated
for direct exposure to other reagents may be identified by the designation
??Reagent Resistant?? printed on the surface of the product. Such
special uses are described as follows: Where exposed to the following
reagents at 60?C or less: Acetic, Nitric (25?C only) acids in concentrations
not exceeding 1/2 normal; hydrochloric acid in concentrations not exceeding
30 percent; sulfuric acid in concentrations not exceeding 10 normal;
sulfuric acid in concentrations not exceeding 80 percent (25?C only); concentrated
or dilute ammonium hydroxide; sodium hydroxide solutions in
concentrations not exceeding 50 percent; saturated or dilute sodium chloride
solution; cottonseed oil, or ASTM 3 petroleum oil.
PVC conduit is designed for connection to couplings, fittings and boxes
by the use of a suitable solvent-type cement. Instructions supplied by the
solvent-type cement manufacturer describe the method of assembly and
precautions to be followed.
RELATED PRODUCTS
For additional Listings of rigid nonmetallic conduit suitable for underground
use, see Reinforced Thermosetting Resin Conduit (DZKT) and
Rigid Nonmetallic Underground Conduit, Plastic (EAZX).
Fittings for rigid nonmetallic conduit are covered under Conduit Fittings
(DWTT).
ADDITIONAL INFORMATION
For additional information, see Electrical Equipment for Use in Ordinary
Locations (AALZ).
REQUIREMENTS
The basic standard used to investigate products in this category is
ANSI/UL 651, ??Schedule 40 and 80 Rigid PVC Conduit.??
UL MARK
The Listing Mark of Underwriters Laboratories Inc. on the product is the
only method provided by UL to identify products manufactured under its
Listing and Follow-Up Service. The Listing Mark for these products
includes the UL symbol (as illustrated in the Introduction of this Directory)
together with the word ?LISTED,? a control number, and the product
name ??Rigid Nonmetallic Conduit Aboveground and Underground
(Schedule 40)?? or ??Rigid Nonmetallic Conduit Aboveground and Underground
Extra Heavy Wall (Schedule 80).??
