Electrical engineers are clear that conductor electrical resistivity increases with temperature. When electrical current runs through cables, the copper or aluminum cable cores would heat up. If the heat gathers and doesn’t dissipate, resistance will increase with temperature and cause more electric power waste.
The ventilation capacity of wire cable trays is much better than perforated cable trays. Because of the fully open structure, wire mesh cable trays are very good for heat ventilating and therefore reduce waste of energy.