22 Electrical wiring and equipment i All electrical equipment and wiring shall

22 electrical wiring and equipment i all electrical

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(22) Electrical wiring and equipment . (i) All electrical equipment and wiring shall conform to the requirements of subpart S of this Part, except as modified by ANSI A120.1-1970 "American National Standard Safety Requirements for Powered Platforms for Exterior Building Maintenance" (see §1910.6). For detail design specifications for electrical equipment, see part 2, ANSI A120.1-1970. (ii) All motors and operation and control equipment shall be supplied from a single power source. (iii) The power supply for the powered platform shall be an independent circuit supplied through a fused disconnect switch. (iv) Electrical conductor parts of the power supply system shall be protected against accidental contact. (v) Electrical grounding shall be provided. (a) Provisions for electrical grounding shall be included with the power-supply system. (b) Controller cabinets, motor frames, hoisting machines, the working platform, roof car and roof car track system, and noncurrent carrying parts of electrical equipment, where provided, shall be grounded. (c) The controller, where used, shall be so designed and installed that a single ground or short circuit will not prevent both the normal and final stopping device from stopping the working platform. (d) Means shall be provided on the roof car and working platform for grounding portable electric tools. (e) The working platform shall be grounded through a grounding connection in a traveling cable. Electrically powered tools utilized on the working platform shall be grounded.
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10/8/2018 1910.66 App D - Existing Installations (Mandatory) | Occupational Safety and Health Administration 7/10 (vi) Electrical receptacles located on the roof or other exterior location shall be of a weatherproof type and shall be located so as not to be subject to contact with water or accumulated snow. The receptacles shall be grounded and the electric cable shall include a grounding conductor. The receptacle and plug shall be a type designed to avoid hazard to persons inserting or withdrawing the plug. Provision shall be made to prevent application of cable strain directly to the plug and receptacle. (vii) Electric runway conductor systems shall be of the type designed for use in exterior locations and shall be located so as not to be subject to contact with water or accumulated snow. The conductors, collectors, and disconnecting means shall conform to the same requirements as those for cranes and hoists in subpart S of this Part. A grounded conductor shall parallel the power conductors and be so connected that it cannot be opened by the disconnecting means. The system shall be designed to avoid hazard to persons in the area. (viii) Electrical protective devices and interlocks of the weatherproof type shall be provided.
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  • Fall '19
  • Electrical wiring, Electric power, Wire

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