雙芯接地電纜完整技術對比指南
Comprehensive comparison of the UK’s most popular domestic wiring cables. The 6242B LSZH provides enhanced fire safety for critical installations, while the 6242Y offers cost-effective solutions for standard applications. Both available from 1.0mm² to 16mm² with solid and stranded conductor options.
6242B Twin & Earth LSZH
vs
6242Y Twin & Earth
雙芯接地電纜完整技術對比指南
Comprehensive comparison of the UK’s most popular domestic wiring cables. The 6242B LSZH provides enhanced fire safety for critical installations, while the 6242Y offers cost-effective solutions for standard applications. Both available from 1.0mm² to 16mm² with solid and stranded conductor options.
英國最流行家用佈線電纜的完整對比。6242B LSZH 為關鍵安裝提供增強防火安全，而 6242Y 為標準應用提供經濟高效解決方案。兩者均提供 1.0mm² 至 16mm² 規格，含實心及絞合導體選項。
6242B LSZH
Low Smoke Zero Halogen 低煙無鹵
6242Y Standard
Standard PVC Insulation 標準PVC絕緣
Product Overview 產品概述
The 6242B and 6242Y Twin & Earth cables represent the backbone of domestic electrical installations across the UK and internationally. These flat-profile cables contain two insulated current-carrying conductors (live and neutral) plus a bare copper circuit protective conductor (earth), all enclosed within a protective outer sheath. This configuration makes them ideal for the majority of domestic wiring applications including lighting circuits, socket outlets, and fixed appliance connections.
The fundamental difference between these cable types lies in their insulation materials and corresponding fire safety properties. The 6242B utilizes Low Smoke Zero Halogen (LSZH) thermosetting compounds compliant with BS 7211:2012. When exposed to fire, LSZH materials emit minimal smoke and no toxic halogen gases (such as hydrogen chloride), significantly improving evacuation safety in enclosed spaces and reducing corrosive damage to sensitive electronic equipment. The higher temperature rating (90°C continuous, 250°C short-circuit) also allows for greater current-carrying capacity in the same conductor size.
The 6242Y employs traditional PVC (polyvinyl chloride) insulation per BS 6004:2012. While PVC releases smoke and halogen gases when burned, it remains the cost-effective standard choice for general domestic installations where enhanced fire safety is not specifically mandated. Both cable types are BASEC approved and ISO 9001 certified, ensuring consistent quality and compliance with UK electrical installation standards.
6242B 和 6242Y 雙芯接地電纜代表了英國及國際家用電氣安裝的骨幹。這些扁平型電纜包含兩根絕緣載流導體（火線和零線）加上裸銅電路保護導體（接地），全部封裝在保護外護套內。這種配置使它們非常適合大多數家用佈線應用，包括照明電路、插座和固定電器連接。
這些電纜類型之間的根本區別在於其絕緣材料及相應的防火安全特性。6242B 採用符合 BS 7211:2012 的低煙無鹵（LSZH）熱固性化合物。當暴露於火中時，LSZH 材料產生極少煙霧且無有毒鹵素氣體（如氯化氫），顯著提高封閉空間的疏散安全性並減少對敏感電子設備的腐蝕損害。較高的溫度額定值（連續90°C，短路250°C）也允許相同導體尺寸具有更大的載流能力。
6242Y 採用符合 BS 6004:2012 的傳統 PVC（聚氯乙烯）絕緣。雖然 PVC 在燃燒時會釋放煙霧和鹵素氣體，但它仍然是不特別要求增強防火安全的一般家用安裝的經濟標準選擇。兩種電纜類型均獲 BASEC 認證和 ISO 9001 認證，確保一致的品質和符合英國電氣安裝標準。
Key Performance Differences 主要性能差異
Fire Safety Properties 防火安全特性
Maximum Operating Temperature 最高運行溫度
Short Circuit Temperature 短路溫度
Current Capacity @ 2.5mm² 載流量
Current Capacity @ 10mm² 載流量
Manufacturing Standard 製造標準
📊 Current Capacity Comparison by Size 各規格載流量對比
Technical Specifications 技術規格
BS 7211:2012 | BASEC Approved | Low Smoke Zero Halogen
| Product Code 產品代碼 | Core Size 芯線 (mm²) | Conductor 導體類型 | Max Diameter 最大直徑 (mm) | Current 載流量 (A) | Resistance 20°C 電阻 (Ω/km) | Colors 顏色 | Lengths 長度 (m) | Usage 用途 |
|---|---|---|---|---|---|---|---|---|
| 6242B1.0 | 1.0 | Solid | 5.0 × 9.2 | 19 | 18.1 / 18.1 | 100 | Lighting circuits | |
| 6242B1.5 | 1.5 | Solid | 5.3 × 9.7 | 24 | 12.1 / 18.1 | 50, 100 | Heavy duty lighting | |
| 6242B2.5 | 2.5 | Solid | 6.0 × 11.2 | 33 | 7.41 / 12.1 | 100 | Ring mains & sockets | |
| 6242B4.0 | 4.0 | Stranded | 6.7 × 12.6 | 45 | 4.61 / 12.1 | 100 | Higher load ring mains | |
| 6242B6.0 | 6.0 | Stranded | 7.5 × 14.6 | 58 | 3.08 / 7.41 | 50, 100 | Light duty cookers/showers | |
| 6242B10.0 | 10.0 | Stranded | 8.8 × 17.5 | 80 | 1.83 / 4.61 | 50, 100 | Higher load cookers/showers | |
| 6242B16.0 | 16.0 | Stranded | 10.1 × 20.5 | 107 | 1.15 / 3.08 | 50, 100 | Light commercial & CUs |
BS 6004:2012 | BASEC Approved | Standard PVC Insulation
| Product Code 產品代碼 | Core Size 芯線 (mm²) | Conductor 導體類型 | Max Diameter 最大直徑 (mm) | Current 載流量 (A) | Resistance 20°C 電阻 (Ω/km) | Colors 顏色 | Lengths 長度 (m) | Usage 用途 |
|---|---|---|---|---|---|---|---|---|
| 6242Y1.0 | 1.0 | Solid | 4.8 × 8.7 | 16 | 18.1 / 18.1 | 10, 25, 50, 100 | Lighting circuits | |
| 6242Y1.5 | 1.5 | Solid | 5.3 × 9.7 | 20 | 12.1 / 18.1 | 5, 10, 25, 50, 100 | Heavy duty lighting | |
| 6242Y2.5 | 2.5 | Solid | 6.2 × 11.7 | 27 | 7.41 / 12.1 | 5, 10, 25, 50, 100 | Ring mains & sockets | |
| 6242Y4.0 | 4.0 | Stranded | 6.9 × 13.1 | 37 | 4.61 / 12.1 | 25, 50, 100 | Higher load ring mains | |
| 6242Y6.0 | 6.0 | Stranded | 7.8 × 15.0 | 47 | 3.08 / 7.41 | 5, 10, 25, 50, 100 | Light duty cookers/showers | |
| 6242Y10.0 | 10.0 | Stranded | 9.5 × 18.9 | 64 | 1.83 / 4.61 | 5, 10, 25, 50, 100 | Higher load cookers/showers | |
| 6242Y16.0 | 16.0 | Stranded | 10.8 × 20.9 | 85 | 1.15 / 3.08 | 25, 50, 100 | Light commercial & CUs |
💡 Selection Guide 選擇指南
🔥 Choose 6242B LSZH When 選擇 6242B LSZH 當：
- Fire safety is critical to the application 防火安全對應用至關重要
- Public buildings: hospitals, schools, shopping centers 公共建築：醫院、學校、購物中心
- Escape routes and emergency lighting systems 逃生路線及應急照明系統
- High-rise residential and commercial buildings 高層住宅及商業建築
- Installations near sensitive electronic equipment 敏感電子設備附近的安裝
- Higher ambient temperatures require derating 較高環境溫度需要降額
- Maximum current capacity is required from cable size 需要電纜尺寸的最大載流能力
- Building regulations specifically mandate LSZH 建築法規特別要求低煙無鹵
🔌 Choose 6242Y PVC When 選擇 6242Y PVC 當：
- Cost-effectiveness is the primary consideration 成本效益是首要考慮因素
- Standard domestic residential installations 標準家用住宅安裝
- General lighting and socket circuits 一般照明及插座電路
- Low fire risk environments 低火災風險環境
- Private residential properties without special requirements 無特殊要求的私人住宅物業
- Smaller length options required (5m, 10m, 25m) 需要較短長度選項
- DIY and home improvement projects DIY及家居裝修項目
- Budget-conscious installations 預算有限的安裝
Common Features 共同特性
Twin & Earth Construction 雙芯接地結構
Two insulated conductors (L/N) plus bare copper earth conductor for complete circuit protection in a flat profile design.
兩根絕緣導體（L/N）加裸銅接地導體，扁平設計提供完整電路保護。
Solid & Stranded Options 實心及絞合選項
Solid conductors (1.0-2.5mm²) for straight runs; stranded conductors (4.0-16mm²) for enhanced flexibility.
實心導體（1.0-2.5mm²）用於直線佈線；絞合導體（4.0-16mm²）增強柔性。
BASEC Approved BASEC認證
Third-party certified ensuring consistent quality, safety and performance compliance with UK standards.
經第三方認證，確保一致的品質、安全性和符合英國標準。
Damp Location Rated 潮濕環境額定
Suitable for fixed installation in both dry and damp premises with reliable moisture protection.
適用於乾燥及潮濕環境的固定安裝，具可靠防潮保護。
Versatile Installation 多用途安裝
Surface clipping, cable trays, free air, or within conduit and trunking for mechanical protection.
可表面夾固、電纜托架、架空，或在導管及電纜槽內進行機械保護。
Full Size Range 完整規格範圍
Both cables available from 1.0mm² to 16mm² covering all domestic and light commercial applications.
兩款電纜均提供 1.0mm² 至 16mm² 規格，涵蓋所有家用及輕商業應用。
Installation Methods 安裝方式
Both 6242B and 6242Y cables are designed for fixed installations in dry or damp premises. They can be installed using various methods depending on the level of mechanical protection required and the aesthetic preferences of the installation.
6242B 和 6242Y 電纜均設計用於乾燥或潮濕環境的固定安裝。可根據所需的機械保護等級及安裝的美觀偏好使用各種方法進行安裝。
Surface Clipping 表面夾固
Clipped to surface
夾固於表面
Cable Trays 電纜托架
On tray systems
托架系統安裝
Free Air 架空
Free air installation
架空安裝
Conduit 導管
In conduit systems
導管系統安裝
Trunking 電纜槽
In trunking systems
電纜槽系統安裝
Protection 機械保護
Conduit/trunking where damage possible
可能損壞處使用導管/電纜槽
Applications 應用領域
Twin & Earth cables are the most widely used domestic wiring cables in the UK and many international markets. They are suitable for virtually all fixed wiring applications in residential and light commercial premises.
雙芯接地電纜是英國及許多國際市場中最廣泛使用的家用佈線電纜。它們適用於住宅及輕商業場所幾乎所有固定佈線應用。
Standards & Compliance 標準與合規
Standard for 6242B: Cables with thermosetting insulation for voltages up to 450/750V with low emission of smoke and corrosive gases when affected by fire | 6242B適用標準：熱固性絕緣電纜，低煙低腐蝕氣體排放
BSI Shop Reference →Standard for 6242Y: Electric cables PVC insulated, non-armoured for voltages up to 450/750V | 6242Y適用標準：PVC絕緣非鎧裝電纜，電壓至450/750V
BSI Shop Reference →Requirements for Electrical Installations governing cable selection, sizing and installation methods | 電氣安裝要求，管理電纜選擇、尺寸及安裝方法
IET Wiring Regulations →Third-party certification ensuring cable quality, safety and performance compliance | 第三方認證確保電纜品質、安全及性能合規
BASEC Official Website →International standard for quality management ensuring consistent product quality | 國際品質管理標準，確保產品品質一致性
ISO Official Reference →Single vertical insulated wire or cable flame test requirements | 單根垂直絕緣電線或電纜燃燒試驗要求
IEC Webstore Reference →Measurement of smoke density of cables burning under defined conditions (applicable to 6242B) | 規定條件下燃燒電纜煙密度測量（適用於6242B）
IEC Webstore Reference →Test on gases evolved during combustion of materials from cables (applicable to 6242B) | 電纜材料燃燒時釋放氣體測試（適用於6242B）
IEC Webstore Reference →Authoritative References 權威參考資料
- British Standards Institution. (2012). BS 7211:2012 Thermosetting insulated cables for voltages of 300/500 V and 450/750 V. London: BSI. https://shop.bsigroup.com/
- British Standards Institution. (2012). BS 6004:2012 Electric cables — PVC insulated, non-armoured cables. London: BSI. https://shop.bsigroup.com/
- Institution of Engineering and Technology. (2022). BS 7671:2018+A2:2022 Requirements for Electrical Installations. London: IET. https://electrical.theiet.org/
- British Approvals Service for Cables. (2024). BASEC Certification Scheme Requirements. Milton Keynes: BASEC. https://www.basec.org.uk/
- International Electrotechnical Commission. (2009). IEC 60332-1-2 Tests on electric and optical fibre cables under fire conditions. Geneva: IEC. https://webstore.iec.ch/
- International Electrotechnical Commission. (2013). IEC 61034-2 Measurement of smoke density of cables burning under defined conditions. Geneva: IEC. https://webstore.iec.ch/
- International Electrotechnical Commission. (2014). IEC 60754-1 Test on gases evolved during combustion of materials from cables. Geneva: IEC. https://webstore.iec.ch/
- International Organization for Standardization. (2015). ISO 9001:2015 Quality management systems. Geneva: ISO. https://www.iso.org/
Contact Us 聯繫我們
For technical consultation, quotations, or customized Twin & Earth cable solutions, please contact our professional team.
如需技術諮詢、報價或定製雙芯接地電纜解決方案，請聯繫我們的專業團隊。
