You are generally correct. Here's the typical breakdown of responsibilities: Electrical Contractor



Wiring

The electrical contractor is almost always responsible for the physical wiring of the fire alarm tamper switches and water flow switches to the fire alarm control panel (FACP). This includes running the correct gauge wire, making terminations at the devices and the FACP, and ensuring the wiring meets all applicable codes and standards (NFPA 70/NEC and NFPA 72).

Power

They also provide the necessary power supply for the fire alarm system itself, as well as any auxiliary devices.

Conduit and Enclosures

They install the conduit, junction boxes, and other enclosures necessary to protect the wiring.

Testing continuity: They perform initial continuity testing to ensure there are no shorts or open circuits in the wiring. Fire Alarm Contractor/Technician



Installation (Generally Not the Physical Mounting)

While the electrical contractor runs the wires, the fire alarm contractor is typically responsible for the installation and programming of the device's functionality within the system, including the physical connection to the device.

Placement

They often determine the precise location of the devices, though they coordinate with the mechanical and sprinkler contractors.

Programming

They program the FACP to recognize the signals from the tamper and flow switches and initiate the appropriate alarms and notifications.

Testing and Commissioning

They perform the final testing and commissioning of the entire fire alarm system, including verifying that the tamper and flow switches are functioning correctly and reporting alarms as intended.

NFPA 72 Compliance

They ensure the entire system complies with NFPA 72 (National Fire Alarm and Signaling Code).

Sprinkler Contractor/Mechanical Contractor



Installation of Sprinkler System Hardware

The sprinkler contractor is responsible for the design and installation of the sprinkler system itself, including the water flow switches.

Mechanical connections of waterflow switch to sprinkler system: They physically mount the waterflow switch to the sprinkler system piping in the correct location. Ensuring proper water flow: They ensure the sprinkler system is properly charged with water and that water will flow as designed in the event of a fire.

In summary

The electrical contractor handles the electrical wiring, while the fire alarm contractor deals with system functionality and programming, and sprinkler contractors handle the sprinkler system and mechanical installation*. This is a common division of labor.It's important to note that the specific responsibilities can vary depending on the project, local codes, and the agreements between the contractors involved. Good communication and coordination between all parties are crucial for a successful fire alarm system installation.

Important Disclaimer: Always consult with qualified and licensed professionals for your specific fire alarm system needs. This information is for general guidance only and should not be considered a substitute for professional advice. Flag for review