Precautions against electric shock and contact burn injuries

PRECAUTIONS AGAINST ELECTRIC SHOCK AND CONTACT BURN INJURIES 

The precautions against electric shock described in the following paragraphs also provide protection against the burn injuries that often occur when contact is made with live conductors. The measures can conveniently be grouped into a small number of categories  

The majority of fixed apparatus is of Class I construction, as defined in BS 2754 1999 Construction of electrical equipment for protection against electric shock. This means that it usually has a metal case enclosing the live parts and that the five parts are insulated from each other and from the carcass by basic insulation only. The case, which is earthed by connection to the protective conductor, protects the internal wiring and components from damage and prevents direct contact. 

Nowadays, insulating plastics are commonly used for wiring accessories such as switches, socket outlets and ceiling roses which usually have no 

First number protection against solid objects  

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