Manual Fire Alarms: What They Are and How They Work
Manual fire alarms, or manual call points (MCPs), are essential components of fire safety systems. These devices allow individuals to manually signal a fire alarm, bypassing automatic sensors. Often labeled with designations like "MCP-3" or "MCP-20," these alarms vary in features and specifications.
The primary purpose of manual fire alarms is to provide a direct method for alerting occupants and initiating fire safety measures, even if automatic detectors fail to activate or are out of range during a fire incident.
Installation and Placement of Manual Fire Alarms
The installation and placement of manual fire alarms follow strict safety regulations, such as those outlined in local fire codes. Key requirements include:
- Placement near evacuation routes: Alarms should be installed near exits and along evacuation paths.
- Installation height: Manual alarms are typically mounted at 5 feet (±4 inches) from the floor to ensure accessibility.
- Distance between alarms: Maximum spacing is 165 feet indoors and 490 feet outdoors.
To enhance functionality, alarms should be positioned away from electromagnetic interference sources, ensuring reliable operation and reducing false alarms.
Connection Schemes for Manual Fire Alarms
Manual fire alarms can be connected using straightforward wiring schemes. Standard systems often include:
Resistors (R):
- R1: Limits current during activation, tailored to the control panel's specifications.
- R2: Used in end-of-line devices to monitor circuit integrity.
Addressable Systems: These utilize a "loop-in, loop-out" connection, simplifying installation and enhancing system diagnostics.
Wireless Alarms: These models, such as the Bolide C2000, eliminate the need for wiring by communicating directly with a central receiver.
Popular Manual Fire Alarm Models
A wide range of manual fire alarms is available, catering to various needs and budgets. Below are some noteworthy examples:
MCP-513-10:
This budget-friendly model includes basic functions, such as "Standby" and "Alarm" indicators, and optional modules for activating additional systems. Priced around $2.50, it’s a solid choice for general use.MCP-20I:
A simpler variant designed solely for alarm activation. Its affordability ($2.10) makes it ideal for installations where additional features are unnecessary.MCP-513-3AM:
This addressable alarm integrates seamlessly with advanced security systems like Orion. With a price of $8, it’s a reliable option for high-tech installations.Wireless Options:
Models such as the Bolide C2000, priced at $25–$30, provide cutting-edge solutions for modern fire safety systems.
Choosing the Right Manual Fire Alarm
When selecting a manual fire alarm, consider the type of fire safety system, environmental conditions, and budget. While basic models suffice for many installations, advanced systems with addressable or wireless capabilities may be necessary for specific applications. Safsale.com offers a variety of options to help you find the perfect solution for your fire safety needs.