ObserveAndListen

Looking to see if there are any commercial Sparkie’s that would know the average cost of installing a new 3 phase 20 amp earthed line from the main board to about 20 meters away following the wall.

I’ve been told that the 3 phase connectors are pretty expensive. I know the fuses would need to be upgraded too.

Will need minimum of 2 that are no more than 40 meters away and if the cost is reasonable to a third that’s only 20.

Would it be cheaper to add the earth line in onto the already installed 4 pin connections that are in the destination needed?