UL 482 Standard For Portable Sun/Heat Lamps

17.2 At closed-in points only, such as the screw-and-washer construction of an insulated terminal mounted in metal, a spacing of 3/64 inch (1.2 mm) is acceptable. Within a thermostat, except at contacts, the spacing between uninsulated live parts on opposite sides of the contacts is to be not less than 1/32 inch (0.8 mm) through air and 3/64 inch (1.2 mm) over the surface of insulating material. The construction is to be such that the spacings will be maintained permanently. The requirement of paragraph 17.1 does not apply to the inherent spacings of a component part of the lamp, such as a snap switch; such spacings are determined on the basis of the requirements for the component in question. See paragraph 2.1.

17.3 The spacings and sizes of pin terminals provided on a sun/heat lamp using a detachable heater-cord set shall comply with the requirements given in the Standard for Attachment Plugs and Receptacles, UL 498.

18.1 If a grounding conductor is provided in the supply cord, all exposed dead-metal parts shall be connected to the grounding conductor.

18.2 A grounding conductor covering of the flexible cord shall be green with or without one or more yellow stripes. The grounding conductor shall be secured to the frame or enclosure of the appliance, which is intended to be grounded, by means of a screw that is not likely to be removed during any servicing operation not involving the power-supply cord, or by other equivalent means. Solder alone shall not be used for securing the grounding conductor. The grounding conductor shall be connected to the grounding blade of the attachment plug.

19. General

19.1 If a sun/heat lamp is intended (mechanically and electrically) for use with lamps of two or more different types, the input test shall be conducted by using the lamp that results in maximum input, and the temperature test shall be conducted with the lamp that results in maximum temperature rises.

20.1 The leakage current of a sun/heat lamp rated for a nominal 120 V supply when tested in accordance with paragraphs 20.3—20.6 shall not be more than 0.5 mA.

20.2 Leakage current refers to all currents, including capacitively coupled currents, that may be conveyed between exposed conductive surfaces of a sun/heat lamp and ground or other exposed conductive surfaces of the sun/heat lamp.