UL-773:2016 pdf free download – STANDARD FOR SAFETY Plug-In Locking Type Photocontrols for Use with Area Lighting.
12 Enclosure
12.1 The enclosure of a control unit shall be so constructed that it will withstand the ordinary abuses and environmental conditions to which it may be subjected in its intended use. This is to be without increasing the risk of fire, shock or personal injury due to total or partial collapse. A resulting reduction of spacings to less than as specified in Table 10.1, loosening or displacement of parts, or other serious defects shall not occur.
12.2 Compliance with 12.1 is to be determined by subjecting representative control units to the test procedures listed in Table 19.1.
13 Internal Wiring
13.1 Internal wiring shall consist of general use wire, or appliance wiring material, acceptable for the particular application, when considered with respect to the temperature, voltage and conditions of service to which the wiring is likely to be subjected.
13.2 Internal wiring shall be so supported or routed that contact with moving parts or parts having sharp edges or burrs, that may cause abrasion of conductor insulation, will not be likely.
13.3 A bare conductor, including pigtails and coil leads, shall be so supported that the spacings specified in Table 10.1 will be maintained.
13.4 All joints and connections shall be mechanically secure and shall provide adequate and reliable contact without strain on connections and terminals.
13.5 A splice shall be provided with insulation equivalent to that of the wires involved.
13.6 Aluminum conductors, insulated or uninsulated, used for internal-wiring interconnections between current-carrying parts shall be terminated at each end by a method appropriate for the combination of metals involved at the connection point.
13.7 If a wire-binding screw construction or a pressure-wire connector is used as a terminating device, it shall be acceptable for use with aluminum under the conditions involved (for example, temperature, heat cycling, vibration).
14 Coil Windings
14.1 Coil windings of relays shall resist the absorption of moisture. This may be accomplished by impregnating, dipping or brushing with varnish, or by equivalent means.
14.2 In general, enamel insulated wire, nylon and phenolic bobbins, treated fibers, treated electrical tapes and most Class 105 insulations having a varnish or similar treatment are considered inherently resistant to the absorption of moisture and need not be further treated.
SHORTING AND OPEN-CIRCUIT PLUGS
15 General
15.1 Shorting and open-circuit plugs shall be of the plug-in, locking type, 3-pole, 3-wire, with the plug blade configuration and limiting dimensions as specified in the Standard for Physical and Electrical Interchangeability and Testing for Locking-Type Photocontrol Devices and Mating Receptacles for Roadway and Area Lighting Equipment, ANSI C136.10.
15.2 For dimming applications, shorting and open-circuit plugs shall be of the plug-in, locking type, 3-pole, 3-wire with the addition of two (optionally four) conductors, with the plug blade configuration and limiting dimensions as specified in the Standard for Dimming Control Between an External Locking Type Photocontrol and Ballast or Driver, ANSI C136.41.