UL 5-2009 pdf download – Surface Metal Raceways and Fittings.
4.9 An adhesive strip, when provided on the raceway, shall serve only as a positioning aid during the installation process. The raceway shall also have provisions for mechanical fastening as required in 4.6 – 4.8. Exception: An adhesive strip provided on a raceway shall be used as the sole means of securement only when the raceway is marked for use with Class 2 circuits only, as defined in Article 725 of the National Electrical Code, NFPA 70. 4.1 0 Provision shall be made for securing the cover to the base of a two-piece raceway at intervals of not more than 4 feet (1 .2 m). A cover shall be held in place by continuous grooves, flanges, or similar constructions only when it is securely fixed in place. See 4.1 2. 4.1 1 For raceways using conductors larger than No. 6 AWG (1 3.30 mm 2 ), the Short Circuit Test, Section 1 7, shall be performed on conductors in the raceway to determine whether the cover is secure. 4.1 2 Raceway or fitting covers shall be constructed such that the use of a tool (such as the prying action of a screwdriver) or two simultaneous deliberate actions are required for their removal for gaining access to internal areas of the raceway after installation. 4.1 3 A partition provided in a raceway or fitting shall be secured in position. The partition shall have the strength required to support the maximum wire fill by weight. 5 Fittings 5.1 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 1 0. 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.
7 Grounding and Bonding 7.1 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 1 5. 7.2 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 1 6. 7.3 A raceway system shall be provided with means for grounding at all points or with fittings intended for connection to another wiring system. 7.4 A metal raceway base or fitting intended for connection to a wiring system shall have a tapped hole adjacent to the wire entry point intended for use with a No. 1 0-32 or larger grounding screw. At least two full threads shall be provided in metal into which screws are to be threaded.