For technical certificate and NVQ level 3 courses in Electrotechnology. This edition has been fully updated in line with the 17th Edition IEE Wiring Regulations (BS 7671:2008). The content meets the requirements of the 2357 Diploma in Electrotechnology, which is the leading qualification for all who want to become electricians. The text is also essential for those undertaking Level 3 NVQs in Electrotechnical Services.