In order to understand the process of designing a fire alarm system for a building it is necessary to have a sound knowledge of the relevant design standard as per NFPA specification, the legal framework surrounding building safety legislation and a sound working knowledge of product application theory. The importance of consultation with all can be the importance of specialist advice by civil defence in relevant areas. This procedure is initially started by the approval of the drawing, Procuring approved materials of UK make, Installation and interfacing with statutory connectivity and finalised with testing, commissioning and final approval of the civil defence.