Insulating the bus bar and switchgear joints is a very unwieldy and Herculean job owing to a very complex and varied profile of the joints in the layouts that are of very customized nature. Because of this majority of the joints are left open without insulation. This in turn results in short circuits, breakdowns and in most cases – the interruptions. Also this is an aspect of human safety that can never be ignored. In many advanced countries and some of the Indian MNCs have made it mandatory to use flexible shrouds made of PVC plastisols for insulation of joints. These shrouds are easily mountable, replaceable and serviceable but also possess better heat resistant and electrical properties and are very durable. These are also resistance to UV exposure ageing.

In developed countries these are used even in areas that are never reached by humans just to save the wild life of birds. In India one hardly comes across any insulation of these live high voltage joints.