MCP: Manual Call Point in Fire Alarm Systems Explained

MCP stands for Manual Call Point, the user-operated device that allows a person to raise a fire alarm manually by breaking a glass element or pressing a frangible plastic plate.

An MCP is the simplest input device on a fire alarm system, and on most projects it is also the most reliably first-operated. The standard form is a red wall-mounted box with a glass or plastic element that the user pushes or breaks; the action closes a switch and signals the panel. In the UK and Ireland the approved form is the EN 54-11 compliant device with a resettable plastic element, mounted at a defined height on escape routes and at final exits.

Although MCPs are conceptually trivial, they are the most common source of malicious or nuisance activations on most sites. Schools, transport hubs, and pub-cluster town centres routinely see MCPs operated as a prank or to evacuate an unwanted event. Fitting protective covers (hinged plastic flaps that audibly click when raised) reduces but does not eliminate this; some sites combine covers with CCTV coverage of high-risk MCP locations to deter repeat offenders.

On addressable systems each MCP carries its own loop address and reports independently. On a conventional system an MCP is wired into a zone and the panel reports only the zone number. Either way, the MCP is a core input device on the wider addressable fire alarm system or its conventional equivalent.