The “NCP-120 Supplementary Code of Practice for the Planning, Installation, Commissioning and Maintenance of Intruder Alarms” outlines essential guidelines for managing intruder alarm systems, including their planning, installation, and maintenance. It emphasizes compliance with relevant British Standards and provides detailed procedures for preventative and corrective maintenance, ensuring systems operate effectively and meet safety regulations. The document also includes forms for recording system parameters and completion certificates for client acknowledgment.