In England and Wales, there are a number of legislative regulations that apply when carrying out any electrical work in any environment, including the Building Regulations (Approved Document Part P) and the British Standard BS 7671.

The requirements for safety and testing schedules vary dependent on the enviroment and appliances installed, whether it be domestic, commercial or industrial.

Oak Tree Kent can assess, advise and develop testing and maintenance contracts to ensure that your are covered and tested to comply with the most up to date regulations and requirements for Health and Safety.

Oak Tree Kent are constantly informed about emerging electrical issues, so you don’t need to.

Listed below are some commonly used electrical standards and approved codes of practice. Additional standards and codes of practice would generally be needed to satisfy a specific application – it is the responsibility of the specifier to select and apply these. You should ensure that the standard you use is the current one.

The standards are organised into a number of topic areas and are ordered with the lowest number at the top of each table:

Electrical & Power



BS 5266 Parts 1 to 7 1981 -1999 Code of practice for emergency lighting

BS 5424 Parts 2 and 3, also IEC 60158 part 3 1985 – 1988 Specification for low voltage control gear

BS 5730 2001 Monitoring and maintenance guide for mineral insulating oils in electrical equipment

BS 5839 Parts 1,3,5,6,8, 9, Also PD6531:1997 1988 – 2003 Fire detection & alarm systems for buildings

BS 6351 parts 1-3 1983 Electric surface heating

BS 6423 1983 Code of practice for maintenance of electrical switchgear and controlgear for voltages up to and including 1 kV

BS 6626 1985 Code of practice for maintenance of electrical switchgear and controlgear for voltages above l kV and up to and including 36 kV

BS EN 62305, 4 parts 2006 Code of practice for protection of structures against lightning

BS 7375 1996 Code of practice for distribution of electricity on construction and building sites

BS 7430 1998 Code of practice for earthing

BS 7671 2008 Requirements for electrical installations. IEE Wiring Regulations. Seventeenth edition

BS 7909 2008 Code of practice for temporary electrical systems for entertainment and related purposes.

BS EN 50110
Parts 1 and 2

1997 Operation of electrical installations

IEC 60479 Parts 1-3, Also PD6519 1987-1998 Guide to effects of current on human beings and livestock.

BS EN 60529 1992 Specification for degrees of protection provided by enclosures
(IP code)

BS EN 60947 Parts 1 to 7 1992 – 2003 Specification for low voltage switch gear and control gear

Electrical Appliances



BS 1362 1973 Specification for general purpose fuse links for domestic and similar purposes (primarily for use in plugs)

BS 1363 Parts 1 -4 1995 13 A plugs, socket-outlets and adaptors.

BS EN (IEC) 60309, Parts 1,2 1999 Plugs, socket-outlets and couplers for industrial purposes.

BS EN 60320, Parts 1, 2 1999 Appliance couplers for household and similar general purposes.

BS EN 60335, Many parts Specification for safety of household and similar electrical appliances