The Table of Contents for this section is available.
The work covered by this section consists of furnishing and installing electrical duct so that electrical circuits may be easily installed at locations shown on the plans.
Electrical duct shall be non-metallic rigid PVC (Polyvinyl Chloride) heavy wall conduit or rigid galvanized steel conduit at the Contractor's option unless indicated otherwise on the plans.
Non-metallic rigid PVC (Polyvinyl Chloride) heavy wall conduit shall be approved for above ground and underground use without concrete encasement in conformance with UL 651 "Rigid Non-Metallic Conduit".
Rigid galvanized steel conduit shall be in conformance with UL 6 "Rigid Metallic Conduit".
Duct is a passageway for electrical circuits and shall be installed in accordance with NEC requirements for an approved raceway. The duct shall be located as shown on the plans, and at a minimum depth of 30" unless indicated otherwise on the plans.
The lengths noted on the plans are only typical. Actual field measurements shall be made to place the ends of the duct at the required locations. Lengths of duct shall be made up with the minimum number of pieces joined together with couplings and solvent as recommended by the manufacturer.
The duct shall be cleaned and plugged in accordance with Article 14004(E).
After feeder circuits in conduit are extended through duct, it shall be plugged with oakum or duct seal.
Buried duct shall be placed in a trench with essentially vertical walls and only wide enough for easy installation of the duct. Tunneling by hand or other approved methods may be required to install duct beneath existing walks or paved ditches. Backfilling shall be done in accordance with Article 3006.
Jacked duct may be installed by either of the following methods at the Contractor's option when placement of electrical duct beneath pavement by jacking is noted on the plans.
(a) The duct may be pushed beneath the pavement through earth without prior construction of an opening.
(b) A bored opening not more than 1" larger than the outside diameter of the duct may be made by augering and the duct inserted.
(c) A drilled opening not more than 1" larger than the outside diameter of the duct may be made with a pneumatic vibrating machine and the duct inserted.
Non-metallic conduit shall not be installed by jacking method (a) as listed above.
If installation of a duct is begun and not completed, any opening shall be plugged as directed by the Engineer. Installation of duct by "water jetting" will not be acceptable.
At locations where it is indicated on the plans that the duct is to be connected to boxes, foundations, or other raceways, the installation shall be made as required by the Section titled "Conduit Installation" to provide an "approved raceway" as specified by the NEC.
1409-4 MEASUREMENT AND PAYMENT.
The quantity of electrical duct to be paid for will be the actual number of linear feet of duct, measured in place to the nearest whole foot, which has been installed and accepted.
The quantity of duct, measured as provided above, will be paid for at the contract unit price per linear foot for "Electrical Duct, __________" of the appropriate size and type.
The above prices and payments will be full compensation for all work covered by this section, including but not limited to materials, equipment, and labor for trenching, backfilling, and jacking or boring.
Payment will be made under:
Electrical Duct, (Size & Type) __________ Linear Foot