If so desired you can provide a 400vAC three-phase supply to a caravan but you must not exceed 48vDC. Any one know or care to speculate on the reason for the DC limit?
I suppose that the 48 Volt D.C. limit refers to the extra low Voltage normally used to supply 12 Volt equipment from a leisure battery. Many caravans have 12 Volt wiring for lights and sockets for 12 Volt camping equipment and lighting. The dedicated E.L.V. wiring will not be suitable for a supply above say 48 Volts. (4 X 12 Volt batteries wired in series, although I have never personally seen that arrangement of batteries). But the E.L.V. limit is normally 50 Volts A.C. or 150 Volts D.C..
I suppose that the 48 Volt D.C. limit refers to the extra low Voltage normally used to supply 12 Volt equipment from a leisure battery. Many caravans have 12 Volt wiring for lights and sockets for 12 Volt camping equipment and lighting. The dedicated E.L.V. wiring will not be suitable for a supply above say 48 Volts. (4 X 12 Volt batteries wired in series, although I have never personally seen that arrangement of batteries). But the E.L.V. limit is normally 50 Volts A.C. or 150 Volts D.C..
