small shed 50 meters away from building which has the primary mains unit.
i want to know how i can mathematically invent a circuit which will power up a secondary unit in the shed.
i am only interested in the maths.
current = w / v
how to choose the protective device?
because there is a long distance between primary unit and secondary unit , would there be a need for an rcbo in the mains unit?
i know the calculation for volt drop. vd = mv x ib x L / 1000