Electrical Distribution System Damage to electrical systems can shut a complex down and cause major disruption for residents and loss of income to owners. Electrical switchgear and cable structures are all interconnected so electrical arcing in one part can spread and damage large sections of the system. Arcing can melt steel and destroy cable insulation. Removal and replacement from inaccessible areas is very costly. © 2004 The Hartford Steam Boiler Insurance and Inspection Company.     All rights reserved.