Classification of electrical equipment according to the method of connection to the electrical supply and guidance on forms of construction to use for each class.Cross References:BS 613BS 1363BS 2135BS 3042BS 3535BS 6500CP 1006IEE Regulations for the Electrical Equipment of BuildingsElectrical Equipment Safety Regulations 1975Electricity Regulations 1908 (Portable Apparatus Exemption) Order 1968Factories Act, 1961Coal and Other Mines (Electricity) Regulations 1956 Miscellaneous Mines (Electricity) Regulations 1956Quarries (Electricity) Regulations 1956