Grade C under BS5839-6 is a system of separate fire detectors and alarm sounders (which may be combined in the form of smoke alarms) that are mains powered with back-up power supply and with a central element of control (panel or control switch).
Grade C Systems
Grade C under BS5839-6 is a system of separate fire detectors and alarm sounders (which may be combined in the form of smoke alarms) that are mains powered with back-up power supply and with a central element of control (panel or control switch).