Wiring Methods & Installation Practices
FAS cable voltage ratings, wire color codes, splice requirements, shielded cable, twisted pairs, junction box labeling, bonding, and device painting restrictions.
- Identify FAS cable types, voltage ratings, and color code requirements
- Describe splice and connection requirements for fire alarm circuits
- Explain shielded cable and twisted pair applications for noise reduction
- Apply bonding, circuit labeling, and device care requirements
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FAS Cable Ratings, Color Codes & Markings
Fire Alarm Cable Types
Fire alarm system (FAS) cables must be listed and rated for their specific application. The OESC and CAN/ULC-S524 specify cable types based on location and circuit function.
Cable Ratings
| Rating | Application | Location |
|---|---|---|
| FPL | General purpose | Horizontal runs, same floor |
| FPLR | Riser rated | Vertical runs between floors |
| FPLP | Plenum rated | Above suspended ceilings, return air plenums |
| NPLFP | Non-power-limited fire | High-power notification circuits |
Wire Color Codes
Fire alarm wiring uses specific color codes to distinguish circuits:
- Red - fire alarm initiating device circuits (positive)
- Black - fire alarm initiating device circuits (negative/return)
- Consistent color coding throughout the system prevents cross-wiring
Important
Fire alarm cables must be marked with the manufacturer, listing agency, and cable type (FPL, FPLR, or FPLP). Never substitute general-purpose cable for fire alarm-rated cable - it will not maintain circuit integrity during a fire.
Cable Voltage Ratings
- Power-limited fire alarm circuits: cables rated for 300V minimum
- Non-power-limited circuits: cables rated for 600V minimum
- Always verify the cable voltage rating matches the circuit classification
Fire alarm cables must be listed and rated (FPL, FPLR, or FPLP) for their installation location. Plenum spaces require FPLP cable. Use consistent color coding throughout the system and never substitute general-purpose cable for fire alarm-rated cable.