Power network and local distribution cables form the critical infrastructure that delivers electricity from generating stations through transmission networks to the final connection at residential, commercial, and industrial properties. These cables operate across multiple voltage levels: Low Voltage (LV) up to 1kV for final distribution, Medium Voltage (MV) at 6.35/11kV and 12.7/22kV for primary distribution, and High Voltage (HV) at 19/33kV for sub-transmission. In the UK, these cables must be approved by Distribution Network Operators (DNOs)—the regional companies responsible for operating the electricity distribution network from the National Grid to end users. The primary standard is BS 7870, which specifies cables for power distribution at voltages up to 36kV.

ESLos cables de red eléctrica y distribución local forman la infraestructura crítica que entrega electricidad desde las estaciones generadoras hasta la conexión final en propiedades residenciales, comerciales e industriales.

繁中電力網絡和本地配電電纜構成了將電力從發電站通過輸電網絡輸送到住宅、商業和工業物業最終連接點的關鍵基礎設施。這些電纜在多個電壓等級運行：低壓（LV）高達 1kV 用於最終配電，中壓（MV）6.35/11kV 和 12.7/22kV 用於一次配電，高壓（HV）19/33kV 用於次輸電。在英國，這些電纜必須獲得配電網絡運營商（DNO）的批准——這些區域公司負責運營從國家電網到終端用戶的配電網絡。主要標準是 BS 7870，規定了電壓高達 36kV 的配電電纜。【說明：DNO（配電網絡運營商）是英國電力市場自由化後負責區域配電的公司，與負責高壓輸電的國家電網（National Grid）不同。每個 DNO 對其區域內使用的電纜有特定的批准要求】

Distribution cables are manufactured with various constructions to suit different installation methods. Concentric cables feature a combined neutral and earth conductor wrapped concentrically around the phase cores, providing both return path and mechanical protection. Split concentric designs separate the neutral into multiple segments for improved fault current distribution. For underground installations, cables use XLPE insulation with MDPE (Medium Density Polyethylene) or LSZH outer sheaths for mechanical protection. Where burial is not practical, Aerial Bundle Cables (ABC) provide an insulated overhead alternative to bare conductor systems, with aluminium cores bundled together for lightweight installation on poles.

ESLos cables de distribución se fabrican con diversas construcciones para adaptarse a diferentes métodos de instalación. Los cables concéntricos cuentan con un conductor neutro y tierra combinado.

繁中配電電纜以各種結構製造以適應不同的安裝方法。同心電纜具有纏繞在相芯周圍的組合中性線和接地導體，提供回路和機械保護。分裂同心設計將中性線分成多個部分以改善故障電流分佈。對於地下安裝，電纜使用 XLPE 絕緣配合 MDPE（中密度聚乙烯）或 LSZH 外護套進行機械保護。在不適合埋設的地方，架空絕緣電纜（ABC）提供了裸導體系統的絕緣架空替代方案，鋁芯捆紮在一起以便輕量化安裝在電桿上。【說明：同心電纜結構的優勢在於中性/接地導體形成連續的金屬屏蔽，在故障情況下提供低阻抗回路並限制接觸電壓，這對安全至關重要】

Concentric cables to BS 7870 are the primary choice for LV mains distribution and service connections in the UK. The concentric neutral/earth conductor surrounds the insulated phase cores, providing a continuous metallic screen that limits touch voltages during faults and serves as the combined neutral-earth (CNE) conductor in PME (Protective Multiple Earthing) systems. Standard concentric designs have a single continuous neutral layer, while split concentric designs divide the neutral into separate segments (typically 3 or 4), allowing individual identification of each segment for connection purposes and improved current-sharing characteristics.

ESLos cables concéntricos según BS 7870 son la opción principal para la distribución de redes LV y conexiones de servicio en el Reino Unido.

繁中符合 BS 7870 的同心電纜是英國低壓幹線配電和服務連接的主要選擇。同心中性/接地導體環繞絕緣相芯，提供連續的金屬屏蔽，在故障期間限制接觸電壓，並作為 PME（保護多重接地）系統中的組合中性-接地（CNE）導體。標準同心設計具有單一連續的中性層，而分裂同心設計將中性線分成單獨的部分（通常為 3 或 4 段），允許單獨識別每個部分用於連接目的，並改善電流分配特性。【說明：分裂同心設計的優勢在於每個中性段可以單獨識別和連接，便於安裝和故障診斷，同時多段設計改善了故障電流在各段之間的分佈】

BS 7870-4.10 specifies medium and high voltage cables for distribution networks at 6.35/11kV, 12.7/22kV, and 19/33kV. These cables use XLPE insulation (cross-linked polyethylene) for its superior electrical and thermal properties, with MDPE (Medium Density Polyethylene) outer sheaths providing excellent mechanical protection for direct burial. LSZH variants are available for installations where fire safety is paramount. Single-core cables are typically installed in trefoil (touching) or flat (spaced) formation, with triplex configurations bundling three single cores together for easier handling. Copper conductors offer lower resistance and better fault current capacity, while aluminium provides cost savings for larger installations.

ESBS 7870-4.10 especifica cables de media y alta tensión para redes de distribución a 6.35/11kV, 12.7/22kV y 19/33kV.

繁中BS 7870-4.10 規定了 6.35/11kV、12.7/22kV 和 19/33kV 配電網絡的中高壓電纜。這些電纜使用 XLPE 絕緣（交聯聚乙烯）以獲得其優越的電氣和熱性能，MDPE（中密度聚乙烯）外護套為直埋提供出色的機械保護。LSZH 變體可用於防火安全至關重要的安裝。單芯電纜通常以三角形（接觸）或扁平（間隔）配置安裝，三芯絞合配置將三根單芯捆紮在一起以便於處理。銅導體提供更低的電阻和更好的故障電流容量，而鋁則為大型安裝提供成本節約。【說明：MDPE 護套特別適合直埋安裝，因為它具有出色的耐濕性、耐化學性和機械強度，可以承受土壤中的壓力和振動】

Each UK Distribution Network Operator (DNO) maintains specific approval lists for cables used in their network areas. While all DNO-approved cables meet BS 7870 requirements, each DNO may have additional specifications for screen construction, conductor sizes, and outer sheath materials. Single-core triplex cables bundle three single-core cables together (typically with a bare messenger wire) for easier installation. Three-core cables have all phases in a single construction with collective screening. Approval by a specific DNO is essential for cables to be accepted for connection to that network.

ESCada Operador de Red de Distribución (DNO) del Reino Unido mantiene listas de aprobación específicas para cables utilizados en sus áreas de red.

繁中每個英國配電網絡運營商（DNO）為其網絡區域使用的電纜維護特定的批准清單。雖然所有 DNO 批准的電纜都符合 BS 7870 要求，但每個 DNO 可能對屏蔽結構、導體尺寸和外護套材料有額外的規格。單芯三芯絞合電纜將三根單芯電纜捆紮在一起（通常帶有裸露的承力線）以便於安裝。三芯電纜將所有相位放在單一結構中，帶有集體屏蔽。特定 DNO 的批准對於電纜被接受連接到該網絡至關重要。【說明：在英國進行配電網絡連接工作時，必須使用相關 DNO 批准的電纜。使用未經批准的電纜可能導致連接被拒絕或需要昂貴的更換工作】

Low voltage distribution beyond concentric cables includes various international standard cables. N2XH (IEC 60502-1) provides XLPE insulated, LSZH sheathed power cables for fire-sensitive installations. NA2XBY adds double steel tape armour (DSTA) for mechanical protection in direct burial. French standard U-1000 R2V/RV/XV cables are widely used in continental Europe, with the RVFV/XAV variant adding flat steel wire armour. British Standard SWA (Steel Wire Armoured) and AWA (Aluminium Wire Armoured) cables to BS 5467 (PVC) and BS 6724 (LSZH) provide robust mechanical protection for industrial and external installations.

ESLa distribución de baja tensión más allá de los cables concéntricos incluye varios cables de estándar internacional. Los cables armados SWA y AWA proporcionan protección mecánica robusta.

繁中除同心電纜外的低壓配電包括各種國際標準電纜。N2XH（IEC 60502-1）為防火敏感安裝提供 XLPE 絕緣、LSZH 護套電力電纜。NA2XBY 增加了雙鋼帶鎧裝（DSTA）用於直埋的機械保護。法國標準 U-1000 R2V/RV/XV 電纜在歐洲大陸廣泛使用，RVFV/XAV 變體增加了扁平鋼絲鎧裝。英國標準 SWA（鋼絲鎧裝）和 AWA（鋁絲鎧裝）電纜符合 BS 5467（PVC）和 BS 6724（LSZH），為工業和外部安裝提供堅固的機械保護。【說明：選擇 SWA 還是 AWA 取決於芯數——多芯電纜使用 SWA，單芯電纜使用 AWA 以避免交流電流在鋼鎧裝中產生渦流和過熱】

Aerial Bundle Cables (ABC) provide an insulated alternative to bare conductor overhead lines for power distribution. All conductors are insulated and bundled together, often with a bare or insulated neutral messenger that provides mechanical support. ABC offers significant advantages: reduced risk of electrocution, improved reliability in forested areas, lower maintenance costs, and easier installation. Available for both LV (1kV) and MV (11kV-33kV) applications, ABC cables are manufactured to various international standards including BS 7870 (UK), NF C33-209 (France), AS/NZS 3560 (Australia/New Zealand), and HD 626 (CENELEC).

ESLos cables aéreos agrupados (ABC) proporcionan una alternativa aislada a las líneas aéreas de conductor desnudo para la distribución de energía.

繁中架空絕緣電纜（ABC）為配電提供了裸導體架空線路的絕緣替代方案。所有導體都絕緣並捆紮在一起，通常帶有裸露或絕緣的中性承力線提供機械支撐。ABC 提供顯著優勢：減少觸電風險、改善林區可靠性、降低維護成本和更容易安裝。可用於 LV（1kV）和 MV（11kV-33kV）應用，ABC 電纜按照各種國際標準製造，包括 BS 7870（英國）、NF C33-209（法國）、AS/NZS 3560（澳大利亞/新西蘭）和 HD 626（CENELEC）。【說明：ABC 特別適合樹木茂密的地區，因為樹枝接觸絕緣電纜不會導致短路或停電，而裸導體線路則會。這顯著提高了供電可靠性並減少了修剪樹木的需求】