We use normal 4 sq mm pvc insulated copper cable in a control panel. Now if I use 2.5 sq mm copper cable insulated with polyester tape, pvc and braided with fiber glass yarn and impregnated with heat resistance varnish. How it will work?
It will probably work fine for most control wiring. I don't think I would be using it for that purpose though. It seems like a kind of expensive wire to be using in such a mundane application.
Cable manufacturers will supply you with current rating/temperature graphs for their products. You must study these and decide if you can live with the temperature raise associated with the expected current. The type of insulation will determine the maximum temperature the wire can withstand. Other factors such as no of cables, type of trunking, diversification etc all need to be considered. Generally at this level i.e 4mm PVC /2.5mm Heat resistant there is no cost advantage and I would use the larger size.
