Power cable needs to transmit electricity over large distances as efficiently as possible to help reduce running costs.
And cables operating at lower temperatures transmit power more efficiently because a cooler cable has lower resistance.
The non-specular finish created by wet blasting power cable increases emissivity to approx. 0.8 - untreated cable is approx. 0.5.
Higher emissivity leads to more heat being emitted. So, a cable with higher emissivity operates at lower temperatures as it can more easily emit excess heat.
An increase in current carrying capacity of around 5% can be achieved due to the increase in surface emissivity.
