14-18 The completed light control system shall be marked "Suitable for Use as Service Equipment",
in a prominent location in the enclosure, in accordance with NEC Article 409.110, and shall be marked with an arc flash hazard warning in accordance with NEC Article 110.16. If the control system is not made in a certified UL 508A Panel Shop, a third party, recognized by the Department of Insurance as having the autho rity, shall label the control systems. Provide a Control System Junction Box sized as shown in the plans and meeting the requirements of Section 1411. 1408 -3 CONSTRUCTION METHO DS Construct the foundation for the control system as shown in the plan s with the top of the foundation 3 inches above finished grade. Fasten the enclosure to the pole by means of a galvanized bracket assembly as shown in the plans. Make all cuts square and remove all rough edges. Have mounting holes match existing mounting holes of the enclosure. Arrange all conduits entering the enclosure in a neat symmetrical manner and extend directly downward into the foundation. Install six RGS feeder circuit condui ts as shown in the plans . Install a Control System Junction Box as shown in the plans . Stub all feeder circuit conduits and spare conduits from Control System in the Control System J unction Box. See Section 17 1411 for junction box construction methods. See plans for conduit sizes. Place pull cord in any unused conduits and cap unused conduit in junction box. Install a bonded conduit choke on the underground termination point of the system groundin g conductor conduit in accordance with NEC Article 250.64(E). Do not terminate the system grounding conduit under the concrete foundation pad. Install a grounding electrode system consisting of a minimum of two ground rods spaced not less than 6 feet apar t at all new or relocated lighting control system panels. Connect ground rods with a bonding jumper sized in accordance with NEC Article 250.66 . Apply two coats of organic zinc repair paint to all field cut metal and conduit threads as specified in Article 1076 -7. 1408 -4 MEASUREMENT AND PAYMENT Light Control Equipment , (Type) will be measured and paid as the actual number of the appropriate type light control systems completed and accepted. The Control System Junction Box will be paid under Section 1411. Payment will be made under: Pay Item Pay Unit Light Control Equipment, (T ype) ____ Each 1409 -1 DESCRIPTION Furnish and install electrical duct including materials, equipment and labor for trenching, jacking, boring or directional boring and backfilling, so electrical circuits may be easily installed, repaired or replaced, and be protected from traffic loading a t locations shown in the plans. 1409 -2 MATERIALS Refer to Division 10.
14-19 Item Section
Conduit 1091 -3 Use electrical duct that is non -metallic rigid PVC heavy wall conduit, HDPE Standard Dimension Ratio (SDR) 13.5 or rigid galvanized steel conduit . 1409 -3 CONSTRUCTION METHODS Duct is a passageway for electrical circuits. Install ducts in accordance with NEC requirements for an approved raceway. Locate the duct as shown in the plan s and at a depth of at least 30 inches unless indicated otherwise in the plan s. Locate bore pits outside the clear zone, as defined in the AASHTO Roadside Desi gn Guide . The lengths noted in the plan s are only typical. Make actual field measurements to place the ends of the duct at the required locations. Make up lengths of duct with the minimum number of pieces joined together with couplings and solvent as rec ommended by the manufacturer. Clean and plug the duct in accordance with Subarticle 1400- 4(E). Duct shall be installed as buried or trenchless as indicated on the plans. Place buried duct 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. Perform backfilling in accordance with
Article 300 — 7.
Trenchless duct may be installed by either of the f ollowing methods at the Contractor's option, when placement of electrical duct beneath pavement by trenchless methods is noted in the plan s.
A.Bore and jack in accordance with Subarticle 1550- 4(A) . Do not install non- metallic conduit by bore and jack method.
B.Directional drill in accordance with Subarticle 171 5-3(D) except use Roadway Standard Drawing 1409.01 for minimum depth requirements .
C.A bored- opening not more than 1 inch larger than the outside diameter of the duct may be made using an impact mole and a pneumatic or hydraulic percussive hammer . If installation of a duct is begun and not completed, plug any opening as directed. Installation of duct by water jetting is not acceptable. At locations where it is indicated in the plan s that the duct is to be connected to junction boxes, foundations, or other raceways, install in accordance with Subarticle 1400- 4(E) to provide an approved raceway as specified by the NEC. Unless otherwise noted in the plan s, rigid galvanized steel conduit is intended for use in above ground applications only. 1409 -4 MEASUREMENT AND PAYMENT Electrical Duct, Type ____ , Size ____ will be measured and paid as the actual number of linear feet of duct, measured in place to the nearest whole foot, installed and accepted. Payment will be made under: Pay Item Pay Unit Electrical Duct, Type ____, Size ____ Linear Foot
Source: North Carolina Standard Specifications for Roads and Structures, 2024 Edition. Pages 718–719 of 857.