Commercial Fire Alarm Installation: The Shop Drawings
Fire alarm system designs must comply with the National Fire Alarm and Signaling Code, NFPA-72. Also, in most jurisdictions, a building permit is required which should include the required fire alarm systems. These must be approved before any installation may begin.
For approval, complete specifications, system descriptions and drawings, must be submitted. The notification appliance circuit, input/output matrix and battery calculations must be included.
Shop Drawing Requirements
Shop drawings are the detailed drawings submitted to the authority having jurisdiction for the location involved before review and approval. These provide the details of the system and connections, such as the location of each device, appliances, wiring sequences and methods, and depictions of how the components are to be linked. Floor plan drawings, control panel wiring, riser diagrams, conduits and routing details must be included.
Point-to-point wiring diagrams must depict exactly how the electrical network will be connected.
Formatting the Shop Drawing for Commercial Fire Alarm Installation
Using uniformly sized paper, the drawing detail should include:
- Identification of the building, deed holder, and occupants
- Name of installer or contractor
- Location of protected premises
- Citation that the design is in accordance with NFPA®70 (Standard for Fire Safety and Emergency Symbols)
- Date of issue and any revisions
Moreover, drawn according to scale, shop drawings for fire alarm systems should clearly identify the floor, compass direction, walls and doors, partitions, descriptions and device locations, primary power location, monitor and control interface locations. All components of the fire alarm system, conductor, conduits, and site of air diffusers located near smoke detectors should also be depicted.
System Representation
Shop drawings must represent:
- Location of control equipment
- Field wiring terminals
- Circuit identification
- Indicators and controls
- Connections to supervising stations and safety control interfaces
- Risers with wiring diagrams included
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