UL 5-2020 pdf download – Surface Metal Raceways and Fittings.
9 Fittings 9.1 A fitting provided with means for the support of a fixture shall have strength and rigidity for the purpose as evaluated by means of the tests described in the Fixture Support Test, Section 15. A nipple intended only for the connection of a lampholder or similar item is not to be considered means for the support of a fixture. 9.2 A fitting provided with means for the support of a ceiling-suspended (paddle) fan shall have strength and rigidity for the purpose as evaluated by means of the tests described in the Ceiling-Suspended Fan Support, Section 16. 10 Wiring Devices 10.1 A receptacle shall be secured to the raceway base by a positive means such as a minimum of two screws or rivets. Exception: A snap-fit orothernon-positive securement means shall be used onlywhen it complies with the Receptacle Secureness Test, Section 19. 10.2 A receptacle shall comply with all of the applicable requirements in the Standard for Attachment Plugs and Receptacles, UL 498. A flush switch shall comply with all of the applicable requirements in the Standard for General-Use Snap Switches, UL 20. 10.3 A wiring device cover constructed to support a flush duplex receptacle shall be provided with more than one securement point for the receptacle. 11 Grounding and Bonding 11.1 Electrical continuity shall be provided between all metal parts of the raceway system when the parts are installed in the intended manner. See the Electrical Resistance Test, Section 21. 11.2 A supplemental set screw or other acceptable positive means of securement shall be provided for each connection between adjacent metal raceway section and between metal raceway sections and fittings of a metal raceway system. Exception: Other methods of providing electrical continuity are to be used only when in compliance with the requirements in the Fault Current Test, Section 22. 11.3 A raceway system shall be provided with means for grounding at all points or with fittings intended for connection to another wiring system.