UL-1283:2015 pdf free download – STANDARD FOR SAFETY Electromagnetic Interference Filters.
10.1.7 A field-wiring terminal shall be prevented from turning by means other than friction alone. Lockwashers, properly applied, may be acceptable.
10.1 .8 A field-wiring terminal shall be provided with a soldering lug or pressure terminal connector firmly bolted or held by a screw.
Exception: A wire-binding screw may be employed at a wiring terminal intended to accommodate a 10 A WG (5.3 mm2) or smaller conductor if upturned lugs, cupped washers, or the equivalent are provided to hold the wire in position.
10.1.9 Upturned lugs, cupped washers, and the equivalent shall be capable of retaining a supply conductor of the size indicated in 10.1.5 under the head of the screw or washer.
10.1.10 A wire-binding screw shall not be smaller in size than No. 10 (4.8 mm diameter).
10.1.11 A terminal plate for a field-wiring wire-binding screw shall be of metal not less than 0.050 inch (1.27 mm) thick, except that a plate not less than 0.030 inch (0.76 mm) thick is acceptable if tightening of the wire-binding screw does not strip the threads from the terminal plate or the screw. There shall be two or more full threads in the metal, which may be extruded if necessary to provide the threads.
10.1.12 A filter intended for connection to a supply circuit that includes a grounded circuit conductor shall have one terminal or lead that is identified for the connection of the grounded conductor of the supply circuit.
10.1.13 A field-wiring terminal intended for the connection of a grounded supply conductor shall be identified by means of a metal coating that is substantially white in color and shall be easily distinguishable from the other terminals, or proper identification of the terminal for the connection of the grounded conductor shall be clearly shown in some other manner, such as on an attached wiring diagram. If wire leads are provided instead of terminals, the identified lead shall have a white or gray color and shall be distinguishable from the other leads.
10.1.14 If a knockout or hole is provided for the field connection of a wiring system, the knockout or hole shall be surrounded by a flat surface. The surface shall have an area large enough to permit the assembly to the filter of a length of standard rigid steel conduit, of the largest size that the knockout or hole will accommodate, by means of a hexagon-shaped locknut.
10.1.15 The minimum diameter of the flat surface surrounding knockouts of the 1/2-, 3/4-, and 1-inch trade sizes shall be 1-5/32, 1-29/64, and 1-13/16 inches (29.4, 36.9, and 46.0 mm), respectively.
10.1.16 Knockouts shall be so secured in place that they can be removed readily without distortion of the enclosure and will remain in place during normal handling.
10.2 Cord-connected filters
10.2.1 A supply cord either shall be permanently attached to the filter, or shall be a detachable power-supply cord having a cord connector for connection to a mating male attachment plug inlet attached to the filter.
10.2.2 The flexible cord shall be Type SJO, SJT, SJTO, SO, ST, or STO.
Exception: A lighter insulated type cord may be used on a filter if the filter is intended for a specific appliance that can use a lighter cord and the filter is marked in accordance with 44.14.
10.2.3 A supply cord shall have a voltage rating not less than the rated voltage of the filter, and shall have an ampacity not less than the current rating of the filter.
10.2.4 The length of a supply cord measured from the outside surface of the enclosure of a filter to the plane of the face of the attachment plug shall not exceed 15 ft (4.6 m).