anybody know where to get tables for working out cable ratings.
i have to quote on a 850 amp supply. it is in a trench most of the way and 52m long.
i normally have to phone aberdare in joburg. the technical guy worked it out to 3x 240mm 4 core armoured cables.seems a bit of an overkill.would work out to over R 160 000 just for cable.