I am from India. We generallu use only Aluminium Cables, particulary at 0.4kV. We use 3 core or 3.5 Core, Aluminium conductor, PVC inner-sheathed, GI wire/strip armoured, PVC outer sheathed cables for 0.4kV system, if the cable is ti be buiried underground. For the installation procedure, we do follow our nation’s Standard Code of Practice for Cable installation. In India, we are governed by the Indian Standard Specification Number 1255, which is the “code of practice for selection, installation & maintenance of power cables upto 33, 000V”.