Was at a job today, i'll try to keep this short, Country park toilet block, 25mm 4core swa tp & n supply, armour as cpc. (TN-S main supply).
100a, 100mA 4 pole rcd at toilet block,
60A 3036 fused switched isolator at supply end, OVER 1 MILE AWAY.
3 phase required for 3 small pumps...