Complete Technical Guide to Fire-Resistant Power and Control Cable Systems
What is BS8519 Cable? | BS8519電纜是什麼？
Complete Technical Guide to Fire-Resistant Power and Control Cable Systems
耐火電力與控制電纜系統完整技術指南
1. Introduction to BS8519 Standard | BS8519標準簡介
BS 8519:2020 is a designated British code of practice for the selection and installation of fire-resistant power and control cable systems for life safety, fire-fighting, and other critical applications. Originally published in 2005 under BS7346-6 standard, it was withdrawn and superseded by BS8519 in 2010 and then updated in 2020.
The standard provides comprehensive guidance for fire-resistant power cables and control cables concerning life safety and firefighting systems such as smoke barriers, sprinkler systems, and firefighting or evacuation lifts used by firefighters to move around large and complex buildings.
BS 8519:2020是一項英國實務準則，專門用於選擇和安裝生命安全、消防及其他關鍵應用的耐火電力和控制電纜系統。該標準最初於2005年以BS7346-6標準發布，2010年被BS8519取代，並於2020年更新。
該標準為耐火電力電纜和控制電纜提供全面指導，涵蓋生命安全和消防系統，如防煙屏障、灑水系統以及消防員用於在大型複雜建築物中移動的消防或疏散電梯。
2. Fire Survival Classifications | 耐火等級分類
Cables designed to meet BS8519 are classified by three survival times, providing circuit integrity and continued operation for a set timeframe to support firefighters and emergency service workers during evacuation.
符合BS8519標準設計的電纜按三種存活時間分類，在設定的時間範圍內提供電路完整性和持續運行，以支持消防員和緊急服務人員進行疏散。
F30 30 Minutes
F60 60 Minutes
F120 120 Minutes
BS8519 Category Classification | BS8519類別分類
| Category 類別 | Power Cables 電力電纜 | Control (Alarm) Cables 控制（警報）電纜 |
|---|---|---|
| Category 1 Means of Escape 30 mins 逃生通道30分鐘 | F30 in accordance with BS7846 / BS8491 | BS 7629 cables meeting: PH30 to EN 50200 and Annex E to EN 50200 |
| Category 2 Means of Escape 60 mins 逃生通道60分鐘 | F60 in accordance with BS7835 / BS8491 | BS7629 cables meeting PH60 to EN 50200 and BS8434-2 120 mins |
| Category 3 Firefighting 120 mins 消防120分鐘 | F120 in accordance with BS7846 / BS8491 | BS7629 cables meeting PH120 to EN 50200 and Annex B to BS8519 |
3. Single Core Fire Resistant Cable BS 6387 | 單芯耐火電纜 BS 6387
Applications 應用範圍
- Fixed installations where cable is protected by conduit or trunking
- Fire resistant cables intended to provide circuit integrity in case of fire
- Emergency lighting systems
- Fire alarm and detection circuits
- Smoke and heat exhaust ventilation systems
- 電纜由導管或線槽保護的固定安裝
- 旨在火災情況下提供電路完整性的耐火電纜
- 緊急照明系統
- 火災警報和探測電路
- 排煙排熱通風系統
Technical Specifications 技術規格
Electrical Ratings 電氣額定值
Construction 結構
Installation 安裝
Applicable Standards 適用標準
Fire Resistance Test Parameters 耐火測試參數
| Test Standard 測試標準 | Duration 持續時間 | Temperature 溫度 | Description 說明 |
|---|---|---|---|
| IEC 60331-21 | 90 min | 950°C | Circuit integrity test 電路完整性測試 |
| BS EN 60331-3 | 120 min | 830°C | Circuit integrity test 電路完整性測試 |
| BS 6387 Category C | 180 min (3h) | 950°C | Resistance to fire 耐火性 |
| BS 6387 Category W | 15 + 15 min | 650°C | Fire + water spray 火焰+噴水 |
| BS 6387 Category Z | 15 min | 950°C | Fire + mechanical shock 火焰+機械衝擊 |
C、W、Z類別適用於95 mm²及以下電纜。120 mm²及以上電纜僅適用C類別。
4. Dimensional & Electrical Data | 尺寸與電氣數據
Single Core BS 6387 Cable Dimensions 單芯BS 6387電纜尺寸
| Cross Section 截面積 (mm²) | Insulation Thickness 絕緣厚度 (mm) | Overall Diameter 總直徑 (mm) | Weight 重量 (kg/km) |
|---|---|---|---|
| 1.5 | 0.7 | 3.76 | 27.1 |
| 2.5 | 0.8 | 4.39 | 39.8 |
| 4 | 0.8 | 4.91 | 55.42 |
| 6 | 0.8 | 5.27 | 74.2 |
Electrical Characteristics 電氣特性
| Cross Section (mm²) | Max. Resistance @20°C (Ω/km) | Short Circuit Rating (A) | Current 2-Cable 1Ø AC/DC (A) | Current 3/4-Cable 3Ø AC (A) | Voltage Drop 2-Cable (mV/A/m) |
|---|---|---|---|---|---|
| 1.5 | 12.1 | 210 | 23 | 20 | 31 |
| 2.5 | 7.41 | 350 | 31 | 28 | 19 |
| 4 | 4.61 | 570 | 42 | 37 | 12 |
| 6 | 3.08 | 850 | 54 | 48 | 7.9 |
Temperature Correction Factors 溫度修正係數
| Ambient Temp. 環境溫度 (°C) | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Correction Factor 修正係數 | 1.02 | 1.00 | 0.96 | 0.91 | 0.87 | 0.82 | 0.76 | 0.71 | 0.65 | 0.58 | 0.50 | 0.41 | 0.29 |
Group Installation Correction Factors 群組安裝修正係數
| Number of Circuits 電路數量 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 12 | 14 | 16 | 18 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Correction Factor 修正係數 | 0.80 | 0.70 | 0.65 | 0.60 | 0.57 | 0.54 | 0.52 | 0.50 | 0.48 | 0.45 | 0.43 | 0.41 | 0.39 |
5. Enhanced Fire Resistant Cable BS7629-1 | 增強型耐火電纜 BS7629-1
Enhanced fire resistant cables are designed for use primarily in fire detection, fire alarm, voice alarm, and emergency lighting circuits. These cables continue to operate for extended periods during fire situations.
‘Enhanced grade’ fire resistance is recommended for systems where cables might need to operate correctly during a fire for periods in excess of those normally required for single phase evacuation.
增強型耐火電纜主要用於火災探測、火災警報、語音警報和緊急照明電路。這些電纜在火災情況下可持續運行較長時間。
「增強級」耐火性建議用於電纜可能需要在火災期間正確運行超過單階段疏散通常所需時間的系統。
Enhanced Cable Specifications 增強型電纜規格
Electrical 電氣參數
Construction 結構
Shielding 屏蔽
Enhanced Cable Dimensions 增強型電纜尺寸
| Cores 芯數 | Cross Section 截面積 (mm²) | Earth Wire 接地線 (n°/mm) | Diameter 直徑 (mm) | Weight 重量 (kg/km) |
|---|---|---|---|---|
| 2 | 1.5 | 1/1.38 | 8.8 | 105 |
| 2 | 2.5 | 1/1.75 | 10.2 | 150 |
| 2 | 4 | 7/0.85 | 12.2 | 220 |
| 3 | 1.5 | 1/1.38 | 9.3 | 130 |
| 3 | 2.5 | 1/1.75 | 10.8 | 190 |
| 3 | 4 | 7/0.85 | 13.0 | 280 |
| 4 | 1.5 | 1/1.38 | 10.3 | 165 |
| 4 | 2.5 | 1/1.38 | 12.0 | 240 |
| 4 | 4 | 7/0.85 | 14.4 | 350 |
Current Carrying Capacity 載流量
| Cross Section (mm²) | Clipped Direct 直接敷設 (A) | In Conduit/Tray 穿管/橋架 (A) | ||
|---|---|---|---|---|
| 2 Core | 3/4 Core | 2 Core | 3/4 Core | |
| 1 | 19 | 17 | 17 | 15 |
| 1.5 | 24 | 22 | 22 | 19.5 |
| 2.5 | 33 | 30 | 30 | 26 |
| 4 | 45 | 40 | 40 | 35 |
6. BS 7846 F120 Armoured Fire Performance Cable | BS 7846 F120鎧裝耐火電纜
這些鎧裝耐火電力電纜專為直接衝擊而設計，符合BS 8491規定的火焰、直接衝擊和水柱的嚴苛要求，適合作為符合BS 8519標準的120分鐘額定3類電力電纜。
F120 Cable Specifications F120電纜規格
Ratings 額定值
Construction 結構
Protection 保護
Applicable Standards 適用標準
F120 Armoured Cable Current Ratings F120鎧裝電纜額定電流
| Cross Section (mm²) | 2 Core Single-Phase 兩芯單相 (A) | 3/4 Core Three-Phase 三/四芯三相 (A) | ||||
|---|---|---|---|---|---|---|
| Direct Buried | In Ducts | In Air | Direct Buried | In Ducts | In Air | |
| 4 | 65 | 53 | 55 | 55 | 45 | 47 |
| 6 | 81 | 67 | 70 | 69 | 56 | 59 |
| 10 | 109 | 89 | 95 | 92 | 75 | 82 |
| 16 | 141 | 115 | 126 | 119 | 96 | 107 |
| 25 | 183 | 148 | 164 | 152 | 124 | 140 |
| 35 | 219 | 178 | 202 | 182 | 149 | 172 |
| 50 | 259 | 211 | 244 | 217 | 177 | 209 |
| 70 | 317 | 260 | 306 | 266 | 218 | 263 |
| 95 | 381 | 313 | 378 | 319 | 263 | 324 |
| 120 | 433 | 357 | 437 | 363 | 300 | 346 |
| 150 | 485 | 401 | 499 | 409 | 338 | 430 |
| 185 | 547 | 455 | 576 | 458 | 382 | 495 |
| 240 | 632 | 527 | 680 | 529 | 442 | 584 |
| 300 | 708 | 592 | 775 | 592 | 496 | 672 |
| 400 | 799 | 669 | 892 | 667 | 570 | 766 |
Voltage Drop Characteristics 電壓降特性
| Cross Section (mm²) | DC (mV/A/m) | Single-Phase AC (mV/A/m) | Three-Phase AC (mV/A/m) |
|---|---|---|---|
| 4 | 12 | 12 | 10 |
| 6 | 7.9 | 7.9 | 6.8 |
| 10 | 4.7 | 4.7 | 4.0 |
| 16 | 2.9 | 2.9 | 2.5 |
| 25 | 1.85 | 1.9 | 1.65 |
| 35 | 1.35 | 1.35 | 1.15 |
| 50 | 0.98 | 1.0 | 0.87 |
| 70 | 0.97 | 0.69 | 0.60 |
| 95 | 0.49 | 0.52 | 0.45 |
| 120 | 0.39 | 0.42 | 0.37 |
| 150 | 0.31 | 0.35 | 0.30 |
| 185 | 0.25 | 0.29 | 0.26 |
| 240 | 0.195 | 0.24 | 0.21 |
| 300 | 0.155 | 0.21 | 0.185 |
7. Life Safety Applications | 生命安全應用
Life safety systems are not limited to fire protection. They include comprehensive systems designed to manage lethal quantities of smoke and very high temperature toxic gases to protect people still in the building during emergencies:
- Smoke and Heat Exhaust Ventilation Systems (SHEVS) – Remove smoke and heat from escape routes
- Emergency Lighting – Illuminate evacuation paths during power failures
- Voice Alarm Systems – Provide evacuation instructions
- Communication Links – Critical care wards in hospitals, control rooms
- Firefighting Lifts – Enable firefighter access throughout buildings
- Sprinkler Systems – Automatic fire suppression
- Fire Doors & Smoke Barriers – Compartmentalization systems
生命安全系統不僅限於消防保護。它們包括設計用於管理致命量煙霧和極高溫有毒氣體的綜合系統，以保護緊急情況下仍在建築物內的人員：
- 排煙排熱通風系統（SHEVS） – 從逃生通道排除煙霧和熱量
- 緊急照明 – 在停電時照亮疏散路徑
- 語音警報系統 – 提供疏散指示
- 通訊連結 – 醫院重症監護病房、控制室
- 消防電梯 – 使消防員能夠進入整棟建築
- 灑水系統 – 自動滅火
- 防火門和防煙屏障 – 分區系統
8. Quality Certifications & Testing | 品質認證與測試
🏆 BASEC Approved
Cables tested and certified by BASEC, The British Approvals Service for Cables
電纜經英國電纜認證服務機構BASEC測試和認證
🔥 LPCB Certified
Certified by Loss Prevention Certification Board for security and fire protection, listed in Red Book Live
經損失預防認證委員會認證的安全和消防產品，列入Red Book Live
🔬 ISO/IEC 17025
UKAS accredited Cable Laboratory meeting international testing standards
UKAS認可的電纜實驗室，符合國際測試標準
🌍 IECEE CBTL
International Electrotechnical Commission testing laboratory accreditation
國際電工委員會測試實驗室認可
Low Smoke Zero Halogen (LSZH) Properties 低煙無鹵特性
| Test Parameter 測試參數 | Standard 標準 | Requirement 要求 |
|---|---|---|
| HCl Content 鹽酸含量 | BS EN 60754-1 | < 0.5% |
| pH Value pH值 | BS EN 60754-2 | ≥ 4.3 |
| Conductivity 電導率 | BS EN 60754-2 | ≤ 10 µS/mm |
| Smoke Density 煙密度 | BS EN 61034-2 | Light transmission ≥ 60% |
| Flame Propagation 火焰傳播 | BS EN 60332-1-2 | Self-extinguishing 自熄 |
9. BS8519:2020 Key Updates | BS8519:2020主要更新
- Added recognition of other critical systems beyond life safety or fire-fighting applications
- Added life safety and roof-mounted generator recommendations
- Added information on uninterruptable power supplies (UPS)
- Clause 12 revised to include recommendations for internal and external fire stopping to maintain switch room fire compartmentation
- Added provisions for thermal expansion of cable protective enclosures
- Further detailed recommendations for design and selection of cable enclosure support systems
- 增加對生命安全或消防應用以外其他關鍵系統的認可
- 增加生命安全和屋頂安裝發電機的建議
- 增加不間斷電源（UPS）的資訊
- 修訂第12條，包括內部和外部防火封堵的建議，以維持配電室的防火分區
- 增加電纜保護外殼熱膨脹的規定
- 進一步詳細說明電纜外殼支撐系統的設計和選擇建議
Contact Us 聯繫我們
Anhui Feichun Special Cable Co., Ltd. | 安徽飞纯特种电缆有限公司
✉️ Technical Support 技術支持
[email protected]10. References & External Resources | 參考資料與外部資源
[1] British Standards Institution, “BS 8519:2020 Selection and installation of fire-resistant power and control cable systems for life safety, fire-fighting and other critical applications — Code of practice,” BSI, 2020. NBS Publication Index
[2] Feichun Cable Technical Documentation, “BFOU vs RFOU: How to Select the Right Offshore Cable for Fire Safety and System Reliability,” 2025. Feichun Cable – Specialized Port Machinery Cables
[3] IEC 60331-21:2019, “Tests for electric cables under fire conditions — Circuit integrity — Part 21: Procedures and requirements — Cables of rated voltage up to and including 0.6/1.0 kV,” International Electrotechnical Commission. IEC Standards
[4] BS 6387:2013, “Test method for resistance to fire of cables required to maintain circuit integrity under fire conditions,” British Standards Institution. BSI Group
[5] BS 7846:2015, “Electric cables. Thermosetting insulated, armoured, fire-resistant cables of rated voltage 600/1000 V for fixed installations, having low emission of smoke and corrosive gases when affected by fire,” British Standards Institution. BSI Group
