UL 467-2013 pdf download – Grounding and Bonding Equipment.
6.1 .4 Means for the attachment of a grounding or bonding conductor shall be so designed that the conductor is securely and reliably held without depending on solder. 6.1 .5 For connectors not covered in Clause 6.1 .3, and where the conductor is attached by means of a single screw, the size of the screw shall not be smaller than as specified in Table 1 . 6.1 .6 A wire-binding screw shall be provided with upturned lugs or the equivalent capable of holding a wire under the head of the screw. 6.1 .7 A cast iron part, other than malleable iron, shall be not less than 3.2 mm (1 /8 in) thick. A malleable iron part, a nonferrous cast-metal part, and a die-cast or extruded part shall be not less than 2.4 mm (3/32 in) thick, except that a die-cast part may be not less than 1 .6 mm (1 /1 6 in) thick if it is ribbed or otherwise reinforced and not marked for direct burial. 6.1 .8 A fitting, such as a hub, a bushing, or a locknut to be used for grounding and intended to provide a rain-tight or liquid-tight connection between threaded metal conduit and a sheet metal enclosure shall comply with the requirements in this Standard and with the requirements for such a fitting in NMX-J-01 7-ANCE, CSA C22.2 No. 1 8.3, or UL 51 4B. See Clause 1 0.4. 6.1 .9 A device intended for the connection of metal conduit, electrical metallic tubing, or flexible armor shall be provided with an end stop or the equivalent, and if intended for the connection of metal conduit, it shall be provided with not less than three full threads in the metal.
6.3 Strap-type clamps 6.3.1 A strap-type clamp shall not be less than 1 2.7 mm (1 /2 in) wide and 0.64 mm (0.025 in) thick. 6.3.2 A communications strap-type clamp shall not be less than 1 2.7 mm (1 /2 in) in width and not be less than 0.64 mm (0.025 in) in thickness. Strap-type clamps intended for outdoor use shall satisfy the temperature conditioning test described in Clause 9.9. 6.3.3 Communication ground clamps may be in the form of straps of copper or other suitable metal. 6.3.4 Communication ground straps shall be fitted either with brass or galvanized steel screws. 6.4 Protection against corrosion 6.4.1 A grounding or bonding device shall be protected by a zinc coating at least 0.025 mm (0.001 in) thick, except as follows: a) if the metal is inherently resistant to corrosion such as nonferrous or stainless steel; b) a device that is used in conjunction with an electrical metallic raceway or metallic cable system and complies with the corrosion protection requirements for fittings in CSA C22.2 No. 1 8.3 or UL 51 4B; c) the thickness of the coating shall be at least 0.01 3 mm (0.0005 in) if the device provides for a direct pressure connection between the grounding or bonding conductor and the surface of an outlet box; d) the thickness of the coating shall be at least 0.0038 mm (0.0001 5 in) if the device is intended for use completely inside an outlet box.