Manual Call Point
A Manual Call Point (MCP), also known as a break glass unit, is a key component of a fire alarm system that allows building occupants to manually trigger a fire alarm in the event of a fire or emergency. It provides a means for people to raise an alarm even if automatic detection (like smoke or heat detectors) hasn't yet activated.
Key Features:
Location: Typically installed on walls in corridors, near exits, and fire-sensitive areas.
Operation: Activating an MCP immediately sends a signal to the fire alarm control panel, triggering audible and visual alarms throughout the premises.
Resettable or Break Glass Types:
Break Glass MCP: Traditional type where a glass element is physically broken.
Resettable MCP: Uses a plastic element that can be reset with a special key or tool after activation, reducing maintenance costs.
Types of Manual Call Points
Conventional MCP
Wired on a single zone circuit.
Triggering one MCP activates the entire zone.
Addressable MCP
Each MCP has a unique address.
When activated, it identifies the exact location of activation on the control panel.
Standard Installation Guidelines
Positioned between 1.2m to 1.4m above floor level.
Located:
At exits and fire exits.
Along escape routes (typically every 30–45 meters depending on building use).
Must be easily visible and accessible, free from obstructions.
MCP Technical Specifications:
| Feature | Specification |
|---|---|
| Operating Voltage | 24V DC (commonly) |
| Type | Addressable or Conventional |
| Material | ABS Fire Retardant Plastic |
| Color | Red (Standard for Fire Alarms) |
| Compliance | EN54-11 / IS 2189 / BS 5839 (as per region) |
How Does a Manual Call Point Work?
Installed in accessible areas such as corridors, stairwells, exits, and assembly points.
Consists of a glass or plastic element that can be pressed or broken to trigger the alarm.
When activated:
It sends a signal to the fire alarm control panel.
The system raises a visual and audible alarm across the premises.
It identifies the specific call point activated on the system’s display, aiding rapid response.
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