什麼是BS6724電纜？— 低煙無鹵鎧裝低壓電力電纜技術指南
Standard: BS 6724 | IEC 60502-1 | BS EN 60332標準：BS 6724 | IEC 60502-1 | BS EN 60332
What is BS6724 Cable?
什麼是BS6724電纜？— 低煙無鹵鎧裝低壓電力電纜技術指南
Introduction 簡介
BS6724 is a British Standard specification for thermosetting insulated, armoured cables with rated voltages of 600/1000V and 1900/3300V, specifically designed to have low emission of smoke and corrosive gases when affected by fire. This standard is widely adopted in the UK and internationally for applications where fire safety is critical.
According to technical specifications from Feichun Cable (reelingcable.com), BS6724 cables combine Low Smoke Zero Halogen (LSZH) properties with robust mechanical protection, making them suitable for both internal and external installations. The cables are manufactured with Cross-Linked Polyethylene (XLPE), Ethylene Propylene Rubber (EPR), or thermosetting polyolefin insulation and an LSZH sheath, providing superior fire performance compared to conventional PVC-sheathed cables such as BS5467.
BS6724是英國標準規範，適用於額定電壓600/1000V和1900/3300V的熱固性絕緣鎧裝電纜，專門設計為在火災影響時具有低煙霧和腐蝕性氣體排放特性。該標準在英國和國際上被廣泛採用，適用於消防安全至關重要的應用場合。
根據飛純電纜（reelingcable.com）的技術規格，BS6724電纜結合了低煙無鹵（LSZH）特性和堅固的機械保護，適用於內部和外部安裝。該電纜採用交聯聚乙烯（XLPE）、乙丙橡膠（EPR）或熱固性聚烯烴絕緣材料和LSZH護套製造，與傳統PVC護套電纜（如BS5467）相比，具有更優越的防火性能。
EN: BS6724 cables produce significantly lower levels of smoke and corrosive gas when exposed to fire compared to BS5467 (PVC armoured) and BS6346 cables. HCl (Hydrogen Chloride) emission levels do not exceed 0.5%.
ZH: BS6724電纜在火災中產生的煙霧和腐蝕性氣體顯著低於BS5467（PVC鎧裝）和BS6346電纜。HCl（氯化氫）排放水平不超過0.5%。
Key Specifications 主要規格
Cable Construction 電纜結構
| Component 組件 | BS6724 1kV (600/1000V) | BS6724 3.3kV (1900/3300V) |
|---|---|---|
| Single Core 單芯 | Stranded Cu (Class 2) or Solid Al (Class 1) | Stranded Cu (Class 2) or Solid Al (Class 1) |
| Two Core 雙芯 | Stranded Cu (Class 2) or Solid Al (Class 1) | N/A |
| Three Core 三芯 | Stranded Cu (Class 2) or Solid Al (Class 1) | Stranded Cu (Class 2) or Solid Al (Class 1) |
| Four Core 四芯 | Stranded Cu (Class 2) or Solid Al (Class 1) | N/A |
| Five Core 五芯 | Stranded Copper (Class 2) | N/A |
| Multicore Auxiliary 多芯輔助 | Stranded Copper (Class 2) | N/A |
| Insulation 絕緣 | GP8, GP6 or EI5 (XLPE/EPR) | |
| Bedding 內護套 | Extruded polymeric material, HCl ≤ 0.5% | |
| Armour (Single Core) 鎧裝（單芯） | Plain Aluminium Wire (AWA) | |
| Armour (Multi Core) 鎧裝（多芯） | Galvanised Steel Wire (SWA) | |
| Outer Sheath 外護套 | LSZH conforming to LTS 1 (BS7655), HCl ≤ 0.5% | |
Construction Details 結構詳情
International Designation: BS6724 cables are commonly referred to by their construction in international markets:
• Multicore: XLPE/LSZH/SWA/LSZH
• Single Core: XLPE/LSZH/AWA/LSZH
國際命名：BS6724電纜在國際市場上通常按其結構命名：
• 多芯： XLPE/LSZH/SWA/LSZH
• 單芯： XLPE/LSZH/AWA/LSZH
Core Colour Identification 芯線顏色識別
Compliance Standards 符合標準
Flame Retardancy: BS6724 cables comply with BS EN/IEC 60332-1-2 (single cable vertical flame propagation) and BS EN/IEC 60332-3-24 Category C (bunched cables flame propagation test).
Smoke Emission: Tested to BS EN/IEC 61034-2 for low smoke density requirements.
Acid Gas Emission: Compliant with BS EN/IEC 60754-1/2 for halogen-free and low acid gas emission.
CPR Compliance: BS6724 cables are subject to Construction Products Regulation (CPR) when used in fixed installations in buildings and constructions.
阻燃性：BS6724電纜符合BS EN/IEC 60332-1-2（單根電纜垂直火焰傳播）和BS EN/IEC 60332-3-24 C類（成束電纜火焰傳播試驗）標準。
煙霧排放：按BS EN/IEC 61034-2低煙密度要求進行測試。
酸性氣體排放：符合BS EN/IEC 60754-1/2無鹵素和低酸性氣體排放標準。
CPR合規性：當BS6724電纜用於建築物和構築物的固定安裝時，須符合建築產品法規（CPR）。
Typical Dimensional Data 典型尺寸數據
| Cores 芯數 | CSA 截面積 (mm²) | Approx. OD 外徑 (mm) | Approx. Weight 重量 (kg/km) | Min. Bend Radius 最小彎曲半徑 (mm) |
|---|---|---|---|---|
| 2 | 1.5 | 12.5 | 295 | 75 |
| 2 | 2.5 | 13.0 | 340 | 78 |
| 2 | 4 | 14.2 | 410 | 85 |
| 3 | 1.5 | 12.8 | 310 | 77 |
| 3 | 2.5 | 13.5 | 365 | 81 |
| 3 | 4 | 14.8 | 450 | 89 |
| 3 | 6 | 15.8 | 545 | 95 |
| 3 | 10 | 17.5 | 720 | 105 |
| 3 | 16 | 19.2 | 920 | 115 |
| 3 | 25 | 21.8 | 1,280 | 131 |
| 3 | 35 | 23.5 | 1,580 | 141 |
| 3 | 50 | 26.0 | 2,050 | 156 |
| 3 | 70 | 29.5 | 2,750 | 177 |
| 3 | 95 | 33.0 | 3,650 | 198 |
| 3 | 120 | 36.0 | 4,450 | 216 |
| 3 | 150 | 39.5 | 5,450 | 237 |
| 3 | 185 | 43.0 | 6,650 | 258 |
| 3 | 240 | 48.5 | 8,500 | 291 |
| 3 | 300 | 53.0 | 10,300 | 318 |
| 4 | 1.5 | 13.5 | 350 | 81 |
| 4 | 2.5 | 14.5 | 420 | 87 |
| 4 | 4 | 15.8 | 520 | 95 |
| 4 | 6 | 17.0 | 640 | 102 |
| 4 | 10 | 19.0 | 870 | 114 |
| 4 | 16 | 21.0 | 1,120 | 126 |
| 4 | 25 | 24.0 | 1,580 | 144 |
| 4 | 35 | 26.5 | 2,000 | 159 |
| 4 | 50 | 29.5 | 2,650 | 177 |
| 4 | 70 | 33.5 | 3,600 | 201 |
| 4 | 95 | 38.0 | 4,800 | 228 |
| 4 | 120 | 42.0 | 5,950 | 252 |
| 4 | 150 | 46.0 | 7,350 | 276 |
| 4 | 185 | 50.5 | 9,050 | 303 |
| 4 | 240 | 57.0 | 11,700 | 342 |
| 4 | 300 | 63.0 | 14,400 | 378 |
| Cores 芯數 | CSA 截面積 (mm²) | Approx. OD 外徑 (mm) | Approx. Weight 重量 (kg/km) | Min. Bend Radius 最小彎曲半徑 (mm) |
|---|---|---|---|---|
| 1 | 25 | 14.5 | 380 | 116 |
| 1 | 35 | 15.5 | 460 | 124 |
| 1 | 50 | 17.0 | 580 | 136 |
| 1 | 70 | 19.0 | 750 | 152 |
| 1 | 95 | 21.0 | 960 | 168 |
| 1 | 120 | 23.0 | 1,150 | 184 |
| 1 | 150 | 25.0 | 1,380 | 200 |
| 1 | 185 | 27.5 | 1,680 | 220 |
| 1 | 240 | 30.5 | 2,120 | 244 |
| 1 | 300 | 33.5 | 2,580 | 268 |
| 1 | 400 | 37.5 | 3,250 | 300 |
| 1 | 500 | 42.0 | 4,050 | 336 |
| 1 | 630 | 47.0 | 5,100 | 376 |
Electrical Characteristics 電氣特性
| CSA (mm²) | DC Resist. @ 20°C 直流電阻 (Ω/km) | 2-Core in Ground 雙芯埋地 (A) | 3-Core in Ground 三芯埋地 (A) | 4-Core in Ground 四芯埋地 (A) | 2-Core in Air 雙芯空氣中 (A) | 3-Core in Air 三芯空氣中 (A) | 4-Core in Air 四芯空氣中 (A) |
|---|---|---|---|---|---|---|---|
| 1.5 | 12.1 | 26 | 22 | 21 | 22 | 18 | 17 |
| 2.5 | 7.41 | 35 | 30 | 28 | 30 | 25 | 24 |
| 4 | 4.61 | 46 | 39 | 37 | 40 | 34 | 32 |
| 6 | 3.08 | 58 | 49 | 47 | 51 | 44 | 41 |
| 10 | 1.83 | 79 | 67 | 63 | 70 | 60 | 57 |
| 16 | 1.15 | 104 | 88 | 83 | 94 | 80 | 76 |
| 25 | 0.727 | 137 | 116 | 110 | 127 | 106 | 101 |
| 35 | 0.524 | 167 | 141 | 133 | 158 | 131 | 125 |
| 50 | 0.387 | 202 | 171 | 161 | 198 | 163 | 155 |
| 70 | 0.268 | 251 | 212 | 200 | 253 | 208 | 197 |
| 95 | 0.193 | 303 | 255 | 241 | 311 | 256 | 243 |
| 120 | 0.153 | 349 | 293 | 277 | 364 | 298 | 283 |
| 150 | 0.124 | 398 | 334 | 315 | 422 | 344 | 326 |
| 185 | 0.0991 | 453 | 380 | 358 | 490 | 398 | 377 |
| 240 | 0.0754 | 532 | 446 | 420 | 591 | 478 | 453 |
| 300 | 0.0601 | 608 | 509 | 479 | 689 | 556 | 526 |
| 400 | 0.0470 | 710 | — | — | 824 | — | — |
Reference Conditions: Ground temperature: 20°C | Soil thermal resistivity: 1.5 K·m/W | Burial depth: 0.8m | Air temperature: 30°C | Conductor operating temperature: 90°C
Note: For XLPE-insulated cables operating at conductor temperatures exceeding 70°C, verify that connected equipment is suitable for the conductor operating temperature per IEE Wiring Regulations 512.1.2.
參考條件：地面溫度：20°C | 土壤熱阻率：1.5 K·m/W | 埋設深度：0.8m | 空氣溫度：30°C | 導體工作溫度：90°C
注意：對於導體溫度超過70°C運行的XLPE絕緣電纜，需根據IEE布線規程512.1.2驗證連接設備是否適合該導體工作溫度。
Comparison: BS6724 vs BS5467 對比：BS6724與BS5467
Applications 應用場景
BS6724 cables are specifically designed for installations where fire, smoke emissions, and toxic fumes could pose a threat to life and equipment. They are ideal for power networks (indoor, outdoor, underground), cable ducting, and direct burial in free-draining soil. The cables can be clipped directly to surfaces, installed on trays, in baskets, or in free air. Due to their ATEX-compliant construction (pressed bedding, no empty spaces between cores), they are also suitable for use in potentially explosive atmospheres.
BS6724電纜專門設計用於火災、煙霧排放和有毒煙氣可能對生命和設備構成威脅的安裝環境。它們非常適合電力網路（室內、室外、地下）、電纜導管和在排水良好的土壤中直埋。電纜可直接夾固在表面上、安裝在電纜橋架、電纜籃或自由空氣中。由於其符合ATEX標準的結構（壓實內護套、芯線間無空隙），它們也適用於潛在爆炸性環境。
References & Sources 參考資料與來源
Technical specifications and cable engineering data referenced from Reeling Cable by Feichun, a division of Anhui Feichun Special Cable Co., Ltd. (安徽飛純特種電纜有限公司), specializing in high-performance reeling cables, crane cables, and industrial power cables for port terminals, mining equipment, and heavy machinery applications. The company features cutting-edge manufacturing facilities with automated production lines and stringent quality control measures.
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