This revised edition keeps the same user-friendly approach that has proved invaluable to students & tutors but now incorporates the new 17th wiring regulations. * Dedicated Student Book purely for the Level 2 Technical Certificate syllabus requirements so students can be sure the content is right for them. * User-friendly jargon-free style that is written with the learning needs of the student in mind. * The book's structure is directly matched to the units & learning outcomes of the Level 2 2330 syllabus to ensure ease of use for both students & tutors. * Additional underpinning knowledge for students working towards the 2356 NVQ in Electrotechnical Services is provided. * Highly visual fully illustrated format to guarantee accessibility every step of the way.