Transcription of Session 13 –Wiring Methods & Cable Standards
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Session 13 –Wiring Methods & Cable Standards
Session 13 Wiring Methods & Cable StandardsMulticorecables on racks or trays may be bunched in a maximum of two and LV single core cables shall be laid in trefoil groups with 150 mm clear spacingbetween trays or racks HV cables shall be segregated from the LV cables. Individual cables emerging from floors or soil shall be protected against mechanical damage by means of galvanized steel pipes or rigid PVC pipes. Single core cables emerging from floors or soil shall be protected by rigid PVC pipes. These pipes shall extend at least 100 mm above ground or floor cables emerging from floors or soil shall be protected collectively by a properly designed metal shield or duct in such a way that heat dissipation of the sustained load carrying cables is not hampered.
Typical IEC Wiring Specification Bends and corners in the cable racks, trays or ladders shall take account of the minimum cable bending radii.
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