Electrical knowledge explained for those on Electrical Apprenticeships, or GCSE physics. Electricians who require a little reassurance or brush up on skills / knowledge lost. Anybody requiring Inspection and Testing knowledge such as City and Guilds 7202, 2365, 2391, 8202 or 5357. Fault finding and general electrical principles and knowledge. Cover theory for level 1, 2, 3 & 4. Also the AM2 and AM2S. Revision for electrical exams, such as electrical principles, installation technology, BS7671 wiring regulations or Inspection and test. Just want to confirm a theory or want to broaden you knowledge.