Normally shipped on drums
Sometimes, due to side discs or battens of drums having been smashed, the top flakes of coils may become flattened and damages. Cotton-covered flexible cables are dangerous to use if damaged by water. High tension and medium voltage armoured and unarmoured cables, lead, aluminium or PVC sheathed, do not damage by short contact with water and in most instances even prolonged immersion will adversely affect only about one metre at either end. Ends must be sealed by lead or a suitable plastic compound. The condition of water or physically damaged medium or high voltage cables is determined by megger testing between poles and to earth, minimum test voltage 500 V, maximum 2.500 V; where extra high voltage cables are suspect pressure testing should be carried out.