MANUFACTURED BUILDING

70-583 Exception: One such space shall be permitted between adjacent pieces of equipment. 540-13. Conductor Size. Conductors supplying outlets for arc and xenon projectors of the professional type shall not be smaller than No. 8 and shall be of sufficient size for the projector employed. Conductors for incandescent-type projectors shall conform to normal wiring standards as provided in Section 210-24. 540-14. Conductors on Lamps and Hot Equipment. Insulated conductors having a rated operating temperature of not less than 200°C (392°F) shall be used on all lamps or other equipment where the ambient temperature at the conductors as installed will exceed 50°C (122°F). 540-15. Flexible Cords. Cords approved for hard usage as provided in Table 400-4 shall be used on portable equipment. 540-20. Approval. Projectors and enclosures for arc, xenon and incandescent lamps and rectifiers, transformers, rheostats, and similar equipment shall be listed. 540-21. Marking. Projectors and other equipment shall be marked with the maker's name or trademark and with the voltage and current for which they are designed in accordance with Section 110-21. D. Nonprofessional Projectors 540-31. Motion Picture Projection Room Not Required. Projectors of the nonprofessional or miniature type, where employing cellulose acetate (safety) film, shall be permitted to be operated without a projection room. 540-32. Approval. Projection equipment shall be listed. E. Sound Recording and Reproduction 540-50. Sound Recording and Reproduction. Sound-recording and reproduction equipment shall be installed as provided in Article 640.