Electric cables. Calculation of the current rating - Thermal resistance. Cables installed in ventilated tunnels Ingestion-build-141043 non-transit-operable

non-transit-operable

BS EN 13927 describes general requirements for equipment used in visual testing

Clauses of this European Standard addressing essential

It describes a method of implementing control gear

Welding consumable manufacturers

Electric cables. Calculation of the current rating - Thermal resistance. Cables installed in ventilated tunnels Ingestion-build-141043 non-transit-operable1 Scope This part of IEC 60287 describes a method for calculating the continuous current rating factor for cables of all voltages installed in ventilated tunnels. The method is applicable to any type of cable. The method applies to natural as well as forced ventilation. Longitudinal heat transfer within the cables and the surroundings of the tunnel is assumed to be negligible. All cables are assumed to be identical within the tunnel and it is assumed