What is Manual call point (MCP) in fire alarm system?


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What is a manual call point?

Manual call point which is usually referred to as an MCP is the point in a building where a switch used manually to activate fire alarm, this requires human intervention. In the automatic fire alarm system, an alarm is triggered through the use of heat detectors and smoke detectors.

Manual call points switches are used along with the automatic alarm system. Usually, they are connected to a central fire alarm panel that is connected to the building’s alarm system.

Manual call points are used to initiate an alarm and operate either by pressing a simple button or by revealing a button when a glass is broken. The monitoring unit will have an indicator for visual indication to easily locate the call point.

Selection types of MCP:

  • MCP can be break - glass type, When struck by the operator, the glass shall be designed to prevent injury.

  • Or otherwise, Key operated the type

  • The call point shall return to its normal condition when the frangible element is replaced.

  • Call point operation shall cause the Fire and Gas control panel to detect a change in the loop current.

  • The manual call points for hazardous areas shall include encapsulated changeover contacts use with IS monitoring circuits.

Uses of MCP:

  • Manual call points are used for manual fire alarm activation and manual extinguisher control.

  • Public buildings, senior citizens’ homes, industrial premises, power stations, airports, train stations, office blocks, events centres, etc.

  • People often detect incipient fires faster than automatic fire detectors. These devices are disabled outside working hours (day/night mode). Manual activation of the alarm