HSE and other organisations have produced guidance on electrical safety that is suitable for a wide range of industries and technical competencies. The information produced by HSE is either free for immediate download or available to order at low cost.
The Simple Precautions and Frequently asked Questions web pages will help you to select the best guidance on working with electricity. Most guidance is available electronically by subscribing to HSE Direct and HSE Books can also supply all current HSE guidance in paper form.
Information on accident statistics is also available from a number of sources.