ELECTRICAL CONDUIT 802.02 Perform tests on sign lighting systems, flashing beacons, and electro -mechanical changeable message signs if connected to the permanent power source. If not connected to the permanent power source at the time of installation, provide temporary power to each device to show proper installation and operation for approval by the Resident Engineer.
E.Mechanical Test After the 24 hr functional test, operate high -mast lighting systems and observe the system at night for six days. Look for defects in the luminaire or lamps. Demonstrate the proper fun ction of lowering devices to the Resident Engineer by completing one lower and raise cycle on each assembly.
F.Defects Correct defects as directed by the Resident Engineer at no additional cost to the Department.
G.Existing Traffic Signal Equipment Do no t remove, disconnect, or otherwise disable existing signal equipment until the functional test on the new equipment is complete, and approved by the Resident Engineer for continued use.
H.Covering of Signal Indications Before making the new signal equipme nt operational, cover signal heads (installed but not lit) with an all -weather bag; do not cover the “walk/don’t walk” indications. Do not allow the new and existing systems to be visible to traffic at the same time.
801.05 Method of Measuremen T — Vacant
801.06 Basis of Payment
The costs of functional tests required by the Contract to be included in the contract unit prices for the relevant lighting and traffic pay items.
802.01 Description
This work consists of providing and installing electrical conduit, junction boxes, fittings, expansion devices, and miscellaneous hardware for electrical conduit.
802.02 Materials
A.Conduits and Fittings Provide conduits and fittings in accord ance with Section 709, “Electrical Conduit.”
B.Junction Boxes Provide junction boxes with gaskets and covers of the size and type shown on the Plans.
802.04 Electrical Conduit
C.Condulets Provide oversized condulets with exposed conduit systems and a sp licing chamber instead of junction boxes, as approved by the Resident Engineer. The use of condulets is prohibited for fused branch circuits.
802.03 Equipment — Vacant
802.04 Construction Methods
A.General Install conduit in accordance with the NEC. Install direct conduit runs with no less than the minimum size shown on the Plans. The Contractor is allowed to use larger conduit for the entire length of the run (outlet to outlet), at no additional cost to the Department. Do not use slip joints or ru nning threads for coupling conduit. If standard couplings are not practical, use threaded -union couplings to couple metal conduit, as approved by the Resident Engineer. Ream conduit ends to remove burrs and rough edges. Make cuts square so ends will butt together for the full circumference. For metal conduit, tighten couplings until the ends come together; do not leave threads exposed. For nonmetallic conduit use solvent weld connections. If damage to galvanized conduit exposes bare metal, re -galvanize, metalize, or paint with zinc dust - oxide paint at no additional cost to the Department. Thread and cap metal and nonmetallic conduit ends with standard pipe caps until wiring starts. After removing caps, install conduit bushings on the threaded ends. Cap conduit ends not terminating in a junction box or electrical enclosure. Provide factory conduit bends in accordance with the NEC, or bend conduit without crimping or flattening using the longest centerline radius for each installation, at least six times the conduit inside diameter. Extend conduit in concrete pole bases, structures, or pedestals no more than 2 in [50 mm] above the footing. Extend conduit entering pull box sides no more than 2 in [50 mm] inside the box wall and slope the conduit toward the top of the box. Extend conduit entering the pull box bottom to at least 4 in [100 mm] above the bottom. Locate near the edges of walls. Use nipples to eliminate cutting and threading short conduit runs. Complete all potentially damaging work before insta lling conductor in the conduit system. Clean existing underground conduit with compressed air if incorporating into a new system. ELECTRICAL CONDUIT 802.04
B.Pushed or Bored Conduit Use pushing or boring methods to place the conduit under pavement. Do not disturb the pavement without approval from the Resident Engineer. Keep pushing or boring pits at least 4 ft [1.2 m] from the edge of surfaced areas. Do not use water for pushing or boring, if the pavement structure may suffer damage. If leaving pits overnight, cover with planking and mark as directed by the Resident Engineer. Push only rigid metal conduits. Provide rigid metal or nonmetallic conduits for boring. For rigid, nonmetallic conduit, pre -drill a hole larger than the conduit, and install conduit by hand. Unless otherwise shown on the Plans, install bored or pushed conduits at least 30 in [0.8 m] deep. Where conduit passes under a surfaced area, cut an “X” in the curb, surface, or both for locating in the future.
C.Trenched Conduit and Backfilling Install condui t in trenches of the types and sizes shown on the Plans. Excavate trenches deep enough to provide at least 30 in [0.8 m] cover, unless otherwise approved by the Resident Engineer. Clear the trench of hard and abrasive materials before placing conduit. Do not place conduit before the Resident Engineer inspects the trench. Excavate immediately before installing the conduit. Store the conduit to not damage or obstruct vehicular or pedestrian traffic, and surface drainage. Excavate trenches to the dimension s shown on the Plans. Dispose of surplus excavated material as approved by the Resident Engineer. If rock is encountered during trenching, and the minimum cover depth is unattainable, alter the depth or location as approved by the Resident Engineer. Exca vate the trench to at least 1 ft [0.3 m] deep. Backfill trenches with material approved by the Resident Engineer immediately after conduit installation. Deposit the backfill material in uncompacted layers no deeper than 6 in [150 mm]. Install underground utility marking tape as shown on the Plans. Provide rock -free backfill for the first layer. Compact each layer before placing the next. Compact backfill to at least 95 percent standard density in accordance with Section 202, “Earthwork.” Reconstruct disturbed surfaced areas, base materials, and sodded areas as approved by the Resident Engineer, at no additional cost to the Department. Remove concrete sidewalks or driveways if damage occurs and reconstruct entire slabs unless otherwise approved by the Resident Engineer. Remove pavement in accordance with Section 619, “Removal of Buildings, Structures, and Obst ructions, NESHAP Inspection.”
D.Exposed Conduit Use rigid metal conduit on exposed surfaces, unless otherwise shown on the Plans. Run surface -mounted conduit straight and flush with the surface of the structure or pole. Support the conduit at least every 5 ft [1.50 m], unless otherwise approved by the Resident Engineer. Use
802.06 Electrical Conduit
galvanized malleable iron conduit clamps and bolts with expansion shield anchor devices approved by the Resident Engineer. Do not use lag or machine bolt shields and percussion driven anchors in concrete or masonry. Use supporting devices that appear in the QPL for conduit attached to structural steel members.
E.Conduit in Concrete Structures Use rigid metal conduit for concrete structures unless shown otherwise on the Plans. Where t he conduit crosses an expansion joint, install an expansion device of the type and size shown on the Plans.
F.Junction Boxes Install the sizes and types of junction boxes shown on the Plans.
802.05 Method of Measuremen T
The Resident Engineer will measure the length of each size and type of conduit separately, along the centerline of the conduit from end to end. The Resident Engineer will measure the length of pushed or bored conduit separately, along the centerline of the conduit from end to end, plus four (4) foot of either side of the pavement section.
802.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.GALVANIZED STEEL ELECTRICAL CONDUIT Linear Foot [Meter]
B.POLYVINYL CHLORIDE (PVC) CONDUIT Linear Foot [Meter]
C.HIGH DENSITY POLYETHYLENE (HDPE) CONDUIT Linear Foot [Meter]
D.ALUMINUM CONDUIT Linear Foot [Meter]
E.JUNCTION BOX Each The Department will consider the cost of flexible steel conduit, fittings, outlets, entrance caps, pull wires, condulets, expansion devices, excavation, backfilling, and miscellaneous hardware to be included in the contract unit price for the relevant conduit pay item. Pushed or bored conduit in excess of the m easured pavement section as specified in 802.04.B and
802.05 will be paid as trenched conduit.
PULL BOXES AND GROUND BOXES 803.04 SECTION 803 PULL BOXES AND GROUND BOXES
803.01 Description
This work consists of providing and installing underground enclosures.
803.02 Materials
Provide materials in accordance with the following subsections: Material: Subsection: Precast Concrete Pull Boxes 739.01 Composite/Polymer Concrete Pull Boxes 739.02 Provide ground boxes as shown on the Plans.
803.03 Equipment — Vacant
803.04 Construction Methods
Provide underground enclosures as shown on the Plans. Obtain the Resident Engineer’s approval to revise enclosure locations to fit field conditions or facilitate conduit system installation. Use pull boxes to distribute electrical service. Provide ground boxes for communication applications, such as Intelligent Transportation Systems.
A.Installation Install underground enclosures on a bed of crushed rock as shown on the Plans. For underground enclosures installed in surfaced areas, make the top of the enclosure flush with the finished surface. For underground enclosures located near curbs as required by the Contract, place adjacent to the back of the curb and flush with the top of the curb. For underground enclosures in ground, ensure the top of the enclosure is flush with the top of, or no greater than 1 in [25 mm] above, the ground surface. Unless otherwise approved by the Resident Engineer, provide underground enclosures wit h concrete aprons, at no additional cost to the Department. Install conduits entering underground enclosures as shown in the Plans and in accordance with Provide underground enclosure extensions of the same material as the enclosure if shown on the Plans. Attach extensions to the underground enclosure to maintain the depth shown on the Plans without causing assembly separation.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 807–810 of 935.