Here is a radical idea. What about use of 4 core cables with a black neutral core, and red, yellow, and blue cores for the three phases. covered with PVC or similar insulating materials.
Provide an outer sheathing of galvanised steel wires. This would serve three purposes. Firstly the robust wires would protect the insulated cores from damage. Secondly the steel wires would provide a metallic earth path back to the transformer. And finally, these metal wires would be in contact with the general mass of earth, thereby providing a very low resistance to earth.
Here is a radical idea. What about use of 4 core cables with a black neutral core, and red, yellow, and blue cores for the three phases. covered with PVC or similar insulating materials.
Provide an outer sheathing of galvanised steel wires. This would serve three purposes. Firstly the robust wires would protect the insulated cores from damage. Secondly the steel wires would provide a metallic earth path back to the transformer. And finally, these metal wires would be in contact with the general mass of earth, thereby providing a very low resistance to earth.
