UL 98:2006 pdf download.Enclosed and Dead-Front Switches.
6.7.2 Wiring terminals
6.7.2.1 Except as noted in 6.7.2.11 and 6.7.2.12:
a) A switch shall be provided with wiring terminals for the connection of conductors having an ampacity not less than the current rating of the devce, and
b) The terminals of a switch having a horsepower or kilowatt rating shall be capable of accommodating conductors having an ampacity equal to 125% of the motor-running current corresponding to the horsepower or kilowatt rating.
6.7.2.2 A winng terminal shall be provided with a soldering lug firmly bolted or held by a screw or provided with a pressure wire connector
6.7.2.3 A wire binding screw shall be permitted at a wiring terminal intended for the connection of a 10 AWG (5.3 mm2) or smaller copper conductor. Upturned edges or the equivalent shall be provided to retain the conductor under the head of the screw when the screw is loosened enough to enable shifting of the conductor.
6.7.2.4 The binding screw shall not be smaller than an M5 with a minimum pitch of 0.80 mm or a No. 10 with not more than 32 threads.
67.2.5 A terminal plate tapped for a wire-binding screw shall be of metal not less than 1.27 mm (0.050 Inch) thick and shall have not less than two full threads In the metal; however, a special alloy plate less than 1.27 mm (0.050 inch) but not less than 0.76 mm (0.030 inch) thick shall be permitted it the tapped threads have enough mechanical strength.
6.7.2.6 Extrusion of a terminal plate for a wire binding screw at the tapped hole so as to give the thickness necessary for at least two fuN threads shall be permitted, provided that the thickness of the unextruded metal is not less than the pitch of the thread.
6.7.2.7 A wire.binding screw shall not thread into material other than metal.
6.7.2.8 The point of attachment of a soldering lug, a pressure wire connector, or a wire-binding screw terminal shall not overhang the base unless the construction is such as to provide enough mechanical strength to prevent any reduction of required spacings.
6.7.2.1 Except as noted in 6.7.2.11 and 6.7.2.12:
a) A switch shall be provided with wiring terminals for the connection of conductors having an ampacity not less than the current rating of the devce, and
b) The terminals of a switch having a horsepower or kilowatt rating shall be capable of accommodating conductors having an ampacity equal to 125% of the motor-running current corresponding to the horsepower or kilowatt rating.
6.7.2.2 A winng terminal shall be provided with a soldering lug firmly bolted or held by a screw or provided with a pressure wire connector
6.7.2.3 A wire binding screw shall be permitted at a wiring terminal intended for the connection of a 10 AWG (5.3 mm2) or smaller copper conductor. Upturned edges or the equivalent shall be provided to retain the conductor under the head of the screw when the screw is loosened enough to enable shifting of the conductor.
6.7.2.4 The binding screw shall not be smaller than an M5 with a minimum pitch of 0.80 mm or a No. 10 with not more than 32 threads.
67.2.5 A terminal plate tapped for a wire-binding screw shall be of metal not less than 1.27 mm (0.050 Inch) thick and shall have not less than two full threads In the metal; however, a special alloy plate less than 1.27 mm (0.050 inch) but not less than 0.76 mm (0.030 inch) thick shall be permitted it the tapped threads have enough mechanical strength.
6.7.2.6 Extrusion of a terminal plate for a wire binding screw at the tapped hole so as to give the thickness necessary for at least two fuN threads shall be permitted, provided that the thickness of the unextruded metal is not less than the pitch of the thread.
6.7.2.7 A wire.binding screw shall not thread into material other than metal.
6.7.2.8 The point of attachment of a soldering lug, a pressure wire connector, or a wire-binding screw terminal shall not overhang the base unless the construction is such as to provide enough mechanical strength to prevent any reduction of required spacings.
