*Electrical equipment left on continuously. 
*Overloaded electrical sockets. 
*Electrical cables running under carpets which may become damaged due to the huge number of people walking over them.
*Employees smoking and discarding cigarettes carelessly. 
*Staff kitchen if left unattended whilst food is being prepared. 
*Hot process, e.g. welding by contractors.
*Incorrect storage of chemicals used for cleaning and photocopiers etc.
*Arson.