IS 7689 : 1989 Guide for the control of undesirable static electricity

1 Scope

1.1 This standard covers guidelines on the control ofundesirable static electricity.

1.2 This guide gives basic information on the generation ofundesirable static electricity in solids, liquids and gases andalso on persons, and describes how the charges produced give riseto discharges which may cause ignitions or electric shocks. Itgives the methods available for minimizing such generation and forsafety dissipating the charges produced.

1.3 Guidance is included in this standard on the means ofmeasuring or estimating the parameters which need to be taken intoaccount when deciding upon the action to be taken to control staticelectricity.

1.4 This standard also deals with static electricity problemswhich are encountered in particular situations during the handlingof different types of materials including liquids, powders, gases,sprays, explosives and electro-explosive devices. In each case thesource and nature of the hazard or nuisances are identified andspecific recommendations are then given for dealing with them.

1.5 The static electricity problems that can occur withpersonnel and their clothing are also described and the precautionsare given for avoiding these problems.

2 References

IS 2309 :1989Code of practice for protection of buildings andallied structures against lightning

IS 3043 :1987Code of practice for earthing

IS 5572 : Part 1 : 1978 Classification of hazardousareas (other thanmines) for electrical installations :Part I Areas having flammable gases and vapours