The present book debates current issues of electrical safety in the context of ensuring industrial security and secure place of work in electrical environment.The book discusses the following issues: Electrical Shock Protection Installation (accidental touch voltage, basic protective measures - IT, TT and TN scheme and additional protective measures), Earthing Systems (earthing sockets, earthing installations and check in earthing installations) and Overvoltage Protection Systems (lightning current informations, protection against lightning and switching overvoltages, composition of lightning installations and equipments buildings with lightning protection installation).We hope that this book will be useful to all specialists from electrical and power domain to respect electrical safety measures.