This revision guide presents concise summaries of key information and provides the opportunity to assess your knowledge - the perfect companion to our Electrical Installations textbooks. It uses a practical approach to give less academic students the confidence they need to succeed. It provides clear and concise explanations of key terms and knowledge for S/NVQs and Technical Certificates. It features multiple-choice questions with answers and explanations that assist with exam preparation and build confidence. It includes margin notes highlight important facts to remember and save students from making common errors.