Handbook of Electrical Installation Practice - BeKnowledge

268 Handbook of Electrical Installation Practice
(2) The Equipment and Protective Systems for Use in Potentially Explosive Atmospheres
Regulations 1996. Only equipment which has been constructed to these
Regulations, or an appropriate British, harmonised European or equivalent
International Standard, should be used in hazardous areas. Such areas include
those where flammable liquids are stored, which includes petrol stations. Equipment
which has been constructed to the Regulations meets the essential safety
requirements of the ATEX Directive.
(3) The Low Voltage Electrical Equipment (Safety) Regulations 1994. These cover
almost all electrical equipment operating on low voltage (i.e. less than 1000V).
(4) The Electricity Safety, Quality and Continuity Regulations 2002 (ESQCR)
came into force on 31 January 2003. These new statutory Regulations revoke:
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The Electricity Supply Regulations 1988
The Electricity Supply (Amendment) Regulations 1990
The Electricity Supply (Amendment) Regulations 1992
The Electricity Supply (Amendment) Regulations 1994
The Electricity Supply (Amendment) (No. 2) Regulations 1994
The Electricity Supply (Amendment) Regulations 1998.
The Regulations impose duties on generators, distributors, suppliers and meter
operators, and in certain respects on their agents, contractors and subcontractors.
The statutory requirements are laid out in eight parts:
I Introductory
II Protection and Earthing
III Substations
IV Underground Cables and Equipment
V Overhead Lines
VI Generation
VII Suppliers to Installations and to Other Networks
VIII Miscellaneous
Regulation 28 provides for the supplier or distributor to provide the following
information in writing to any person who can show reasonable cause for
requiring it:
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The maximum prospective short circuit current at the supply terminals
For low voltage connections, the maximum earth fault loop impedance of the
earth fault path outside the installation
The type and rating of the distributor’s protective device or devices nearest
to the supply terminals
The type of earthing system applicable to the connection
The declaration of the number of phases
The voltage and frequency.
The Engineering Inspectorate of the Department of Trade and Industry has
published detailed guidance on the application of the Regulations.