Flame Retardancy Rating Selection for Fire and Security System Cables: Engineering Judgment from FPLR to PH120
2026/09/18 30
Fire and security cable selection follows the principle of "installation position determines rating, building type determines duration": vertical riser installation between floors requires the FPLR rating; circuits that must maintain power during a fire should select PH30/PH60/PH120 fire resistance durations based on building importance, consistent with fire protection design documents and acceptance requirements.
Related Topics
How to Select Fire Cable Ratings
Difference Between PH60 and PH120
Security Monitoring Cable Requirements
Fire Acceptance Cable Standards
Fire cable compliance cannot be remedied after the fact. The selection phase must be strictly aligned with fire protection design documents.
Time dimension: PH30 / PH60 / PH120, indicating the duration of circuit integrity under flame conditions.
2. How to Determine Fire Resistance Duration
Building/Facility Type
Common Requirements
Description
Fire linkage in general civil buildings
PH30
Basic alarm and linkage circuits
Important fire facilities and evacuation systems
PH60
Requires longer maintenance duration
Super high-rise and important public buildings
PH120
Key fire facilities maintained for 120 minutes
Specific requirements are subject to the project's fire protection design documents and local acceptance standards.
3. Cable Characteristic Requirements
Outer layer wrapped with flame-retardant material, effectively slowing burning speed and ensuring safe use.
High-temperature resistant with strong flame resistance.
Applied in fire alarm systems, security monitoring equipment, automotive electronics, and other fields.
4. Construction Quality Determines Fire Resistance
Fire protection lines are installed independently, not sharing trays with strong-current wiring.
Fire stopping where lines cross fire compartments.
Maintain fire resistance continuity at joints to avoid weak points.
Use fire-resistant supports for fasteners to prevent cable falling during fires.
5. Common Reasons for Acceptance Rejection
Cable rating does not meet design requirements (e.g., FPL misused in risers).
Missing certification certificates or test reports.
Unclear printing, making model and manufacturer untraceable.
On-site sampling re-inspection failure.
Fahua Cable Supply
Fire alarm and security cables covering UL FPL, FPLR, and PH30 / PH60 / PH120, with certification documents and test reports available, supporting project acceptance documentation. Tel: 0574-65837193.
