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Electrical Systems Materials

3801Rigid Metal Conduit

MN · 2025 Standard Specifications✓ Full text on BuildSpecBook pages 1005–0 Save this section

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3801.1SCOPE

Provide Rigid Metal Conduit (RMC) and associated fittings for electrical systems to construct a threadable raceway for protection and routing of conductors and cables. Provide conduit hangers, clamps, straps, U-bolts, strut, and bar supports, threaded rod, inserts, and miscellaneous hardware for hanging and surface mounting RMC and PVC coated galvanized RMC in accordance with the NEC, as recommended by the conduit manufacturer, and as specified in the Contract, or, if not specified then as directed by the Engineer.

3801.2REQUIREMENTS

A Galvanized Steel RMC Provide Galvanized Steel RMC meeting the following:

(1)UL 6 “UL Standard for Safety Electrical Rigid Metal Conduit-Steel”
(2)ANSI C80.1 “Electrical Rigid Steel Conduit (ERSC)”
(3)Hot dip galvanize zinc coated inside and out

Label each conduit length with the relevant NRTL label. B Fittings For Galvanized Steel RMC Provide conduit bodies and fittings meeting the requirements of UL 514B, “ UL Standard for Safety Conduit, Tubing, and Cable Fittings.” Fittings included locknuts, bushings, conduit bodies, and elbows. Provide threaded insulated grounding bushings for terminating the conduit raceway threaded ends inside enclosures such as junction boxes, handholes, and cabinets meeting the following requirements: Malleable iron Tinned copper lay-in lug UL 467 and UL 514B RoHS Compliant C PVC Coated Galvanized Rigid Metal Conduit (PVC coated galvanized RMC) Provide Department approved PVC coated galvanized RMC and fittings for electrical systems when specified in the Contract with approved hangers and supports.

C.1 PVC Coated Galvanized Steel RMC Provide PVC coated galvanized RMC fittings listed on the APL, Lighting. C.2 PVC Coated RMC Fittings Provide PVC coated RMC fittings listed on the APL, Lighting to use with PVC coated galvanized RMC. Use fittings from the same manufacturer of the PVC coated galvanized RMC being used on the Project. D Conduit Expansion and Deflection/Expansion Coupling Fittings Provide PVC coated and urethane lined metallic conduit expansion fittings and PVC coated metallic deflection/expansion coupling fittings for PVC coated RMC runs encased in concrete, hanging, or surface mounted. Use fittings from the same manufacturer of the PVC coated galvanized RMC conduit used on the Project. D.1 Expansion Coupling Fittings Provide expansion coupling fittings listed on the APL, Lighting. D.2 Deflection/Expansion Coupling Fittings Provide deflection/expansion coupling fittings listed on the APL, Lighting.

3801.3SAMPLING AND TESTING

The Department reserves the right to sample, test, inspect, and accept or reject conduit or fittings based on its own tests.

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Source: Minnesota Standard Specifications for Construction, 2025 Edition. Pages 1005–0 of 1,081. View official source ↗

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