UL 5:2009 pdf download.Surface Metal Raceways and Fittings.
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 15.
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 ot a metal raceway system.
Exception: Other methods of providing electrical contrnuity are to be used only when in compliance with the requirements in the Fault Current Test, Section 16.
7.3 A raceway system shall be provided with means for grounding at all points or with fittings intended fOr connection to another winng 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. 10-32 or larger grounding screw. At least two full threads shall be provided in metal into which screws are to be threaded.
Exception: A metal raceway base or titling is not required to have a tapped hole when it Is provided with a fastening means such as a wire attached by a connector, cl, or other means that has been evaluated and determined to be suitable. A self-threading or factory-assembled screw shall be provided instead of a rapped hole only when it is identified for the purpose of securing the grounding conductor. A fastening means is not required when fastening methods are referenced in the instructions.
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 15.
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 ot a metal raceway system.
Exception: Other methods of providing electrical contrnuity are to be used only when in compliance with the requirements in the Fault Current Test, Section 16.
7.3 A raceway system shall be provided with means for grounding at all points or with fittings intended fOr connection to another winng 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. 10-32 or larger grounding screw. At least two full threads shall be provided in metal into which screws are to be threaded.
Exception: A metal raceway base or titling is not required to have a tapped hole when it Is provided with a fastening means such as a wire attached by a connector, cl, or other means that has been evaluated and determined to be suitable. A self-threading or factory-assembled screw shall be provided instead of a rapped hole only when it is identified for the purpose of securing the grounding conductor. A fastening means is not required when fastening methods are referenced in the instructions.
