805Electrical Conduit and Fittings

805.01 Description

Furnish and install electrical conduit and fittings.

805.02 Materials

Portland Cement Concrete 902.10, Mix No. 6 Metallic Conduit and Fittings 921.07.01 Nonmetallic Conduit and Fittings 921.07.02 Flexible Conduit and Fittings 921.07.02 PVC Coated Metallic Conduit and Fittings 921.07.03

805.03 Construction

805.03.01 Bends. Unless otherwise specified, use manufactured bends or field bends to make

changes in direction. Maintain an 18 in. trade radius.

805.03.02 Connections. Make conduit runs with as few couplings as standard length will permit.

Rigid steel conduit connections shall be threaded. Paint field cut threads of galvanized conduit with approved galvanizing repair paint prior to assembly. Connect nonmetallic conduit using a solvent welding process. Use watertight cast ferrous compression type fittings for electrical metallic tubing (EMT).

805.03.03 Conduit Terminations. Use pull boxes or conduit bodies at conduit terminations.

Conduits terminating in cast iron junction boxes shall be threaded into hubs, with bonding screws furnished and installed on the interior of the box. Conduits terminating in junction boxes without hubs shall be secured with two lock nuts with an insulated grounding bushing installed. Conduits terminating at concrete foundations, manholes, or hand holes shall be secured as specified in the Contract Documents. Cap all ends of unused conduit.

805.03.04 Cleaning and Capping. Prior to installing conductors, remove all obstructions and

debris by pulling a mandrel type device through each conduit run and all fittings in the presence of the Engineer. Cap conduit ends by using a manufactured cap or plug. Prior to the installation of wiring, remove manufactured caps or plugs and install an insulated bonding bushing on galvanized rigid conduit; install bell end fittings on PVC conduit. 805 — ELECTRICAL CONDUIT AND FITTINGS 2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS

805.03.05 Pull Wire. Install a pull wire or cord in all conduits left empty. Pull wire and cord

shall be corrosion resistant material with a breaking strength of at least 200 lb.

805.03.06 Exposed Conduit. Exposed conduit runs shall be parallel or at right angles to walls,

slabs, girders, etc. Locate conduit to minimize accumulation of dirt and to provide accessibility for painting. Attach conduit to steel, concrete, masonry, or timber using straps, clamps, or hangers of an approved type made of stainless steel or galvanized malleable iron. Space the attachments as specified. When specified, paint all exposed rigid steel conduit surfaces to match the color of adjacent material. Prepare all galvanized surfaces as specified in Section 435 before the application of approved paint.

805.03.07 Expansion Joints. Where conduits cross expansion joints in the structure, or where

otherwise specified, use expansion fittings of a type that ensures electrical continuity across the joint.

805.03.08 Buried Conduit (Trenched). Conduits shall be sloped to drain and have a cover of at

least 24 in.

805.03.09 Encased Conduit (Slotted or Trenched). Place the conduit accurately, and secure it

rigidly to maintain position during concrete placement.

805.03.10 Conduit Installation Under Existing Paved Areas (Bored). Do not cause any

disturbance to the existing roadway.

805.04 Measurement and Payment

The payment will be full compensation for all excavation, backfill, encasement concrete, asphalt mixes, paint, pull wires, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.

805.04.01 Electrical conduit and electrical conduit attached to Bridges will be measured and paid

for at the Contract unit price per linear foot measured along the center line of the conduit from end to end.

805.04.02 Electrical hand holes, manholes, pull and junction boxes will be measured and paid for

as specified in Section 811.

805.04.03 Electrical conduit, fittings, and junction boxes constructed into concrete structures will

not be measured but the cost will be incidental to the pertinent Concrete Traffic Barrier, Concrete Parapet, or other pertinent Concrete items specified in the Contract Documents.