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HD 603

6 Min Read
In the international cable industry, the letter "N" at the beginning of a cable designation carries significant technical and regulatory meaning. However, many engineers encounter confusion when comparing cables marked with N (without brackets) versus (N) (with brackets). This distinction is fundamental to understanding whether a cable is manufactured to German national standards or European harmonised standards. 在国际电缆行业中，电缆型号开头的字母"N"具有重要的技术和法规含义。然而，许多工程师在比较标有N（不带括号）和(N)（带括号）的电缆时会感到困惑。这种区别对于理解电缆是按照德国国家标准还是欧洲协调标准制造的至关重要。
Technical Department
on22/01/2026

What Does the Letter “(N)” in Brackets Signify in Cables Like (N)TSCGEWÖU Compared to Cables Without Brackets “N”?

In the international cable industry, the letter “N” at the beginning of a cable designation carries significant technical and regulatory meaning. However, many engineers encounter confusion when comparing cables marked with N (without brackets) versus (N) (with brackets). This distinction is fundamental to understanding whether a cable is manufactured to German national standards or European harmonised standards. 在国际电缆行业中，电缆型号开头的字母”N”具有重要的技术和法规含义。然而，许多工程师在比较标有N（不带括号）和(N)（带括号）的电缆时会感到困惑。这种区别对于理解电缆是按照德国国家标准还是欧洲协调标准制造的至关重要。
6 Min Read
KEMA approval is recognised as the key independent Dutch third-party accreditation for electrical cables, particularly important when working on low voltage installation projects in the Netherlands and across Europe. KEMA approvals are issued by KEMA Labs, based in Arnhem, The Netherlands. KEMA Labs' parent company is CESI (Centro Elettrotecnico Sperimentale Italiano), the Italian independent testing and laboratories business, having acquired the testing division from DNV GL Energy in 2019.
Technical Department
on04/01/2026

What are KEMA Approved Cables?

KEMA approved cable, KEMA certification, KEMA Labs, KEMA certified, KEMA approval, Dutch cable certification, Netherlands cable standard, third-party certified cable, independent cable certification KEMA认证电缆, KEMA認證電纜, 荷兰标准电缆, 荷蘭標準電纜, 低烟无卤电缆, 低煙無鹵電纜, 数据中心电缆, 數據中心電纜, 荷兰认证, 荷蘭認證
6 Min Read
UNE 21123 standard refers to the design and cross-sectional area specifications for cables used by utilities on power distribution circuits with voltage ratings up to and including 600/1000V (0.6/1kV). UNE standards are released by AENOR (Asociación Española de Normalización y Certificación), the Spanish Association for Standardisation and Certification. As AENOR is a member of ISO, IEC, and CENELEC, many of its standards are harmonized with European and international conventions.
Technical Department
on04/01/2026

What is UNE 21123 Cable?

UNE 21123 standard refers to the design and cross-sectional area specifications for cables used by utilities on power distribution circuits with voltage ratings up to and including 600/1000V (0.6/1kV). UNE standards are released by AENOR (Asociación Española de Normalización y Certificación), the Spanish Association for Standardisation and Certification. As AENOR is a member of ISO, IEC, and CENELEC, many of its standards are harmonized with European and international conventions.
8 Min Read
HD 620 is commonly linked to the German national standard DIN VDE 0276 Part 620 and is harmonized with international standard IEC 60502-2. The standard establishes comprehensive construction requirements, dimensional specifications, and test methods that exceed the baseline requirements of IEC 60502-2. Both HD 620 and IEC 60502-2 require compulsory conductor and insulation screening, typically applied through a triple extrusion process with the insulation layer. The test methodology for compliance is set out in HD 605 subclause 2.1.1 for insulation material and HD 605 subclause 2.1.2 for sheath material.
Technical Department
on29/12/2025

What is HD620 Standard Cable?

HD 620 cables are designed for power distribution networks, industrial installations, and infrastructure applications. These medium voltage cables are suitable for permanent installation in various environments including underground, outdoor, and cable ducting installations.
11 Min Read
UNE 21123 Standard Cable
Technical Department
on10/11/2025

What is UNE 21123 Standard Cable?

UNE 21123 is a Spanish electrical cable standard developed by AENOR (Asociación Española de Normalización y Certificación), the Spanish Association for Standardisation and Certification. This standard specifies the design, construction, and cross-sectional area requirements for cables used in power distribution circuits with voltage ratings up to and including 600/1000V (0.6/1 kV).[1] As a member of ISO, IEC, and CENELEC, AENOR develops standards in conjunction with European and international conventions, ensuring that UNE 21123 cables meet both regional and global safety and performance requirements.[2] These cables are widely used in transmission, distribution, and power networks across industrial installations in Europe and beyond.