Christopher Kitcher has been working in the electrical industry for 60 years, many of which have been spent working on site. The last 20 years have entailed teaching and training at various colleges and companies. He is the author of Electricians' On-Site Companion (Routledge, 2017), Practical Guide to Inspection, Testing and Certification of Electrical Installations (Routledge, 2018), and Electrical Installation Calculations: Advanced (Routledge, 2022).