Overview
EN 61935-2-20:2009 (CLC adoption of IEC 61935-2-20:2008) is a blank detail specification for patch cords and work‑area cords intended for Class D (Category 5e) applications. It sets the layout, style and required information for preparing detail specifications for cords with transmission characteristics up to 100 MHz. The document is designed to be used by national bodies, manufacturers or users when creating product‑specific or national detail specifications and complements the patch‑cord test procedures in IEC/EN 61935 series.
Key topics and requirements
- Scope and purpose: Template for describing work‑area cords for Class D (Category 5e) applications under the EN 50173 series (generic cabling).
- Transmission band: Intended for cords with characteristics up to 100 MHz (Category 5e/Class D).
- Specification layout: Prescribed format and numbered data items ([1]–[9]) that every detail specification should include - e.g., document owner, references, cable description, material/construction, bending radius and temperature limits.
- Electrical & transmission parameters: Requires adherence to the applicable sectional specification for the referenced category (e.g., Category 5e characteristic impedance, coupling attenuation/screening where applicable).
- Mechanical and environmental data: Space for mechanical requirements (flexibility, bending radius) and environmental severity (MICE‑derived recommendations from ISO/IEC 24702).
- Test configuration and methods: Test arrangements for cords are specified in IEC/EN 61935‑2; coupling attenuation methods referenced in EN 50289‑1‑13.
- Notation rules: Use “na” (not applicable) when a characteristic does not apply and “ns” (not specified) when no specific value is required - defaulting to sectional specification requirements.
- Connector compatibility: References to IEC 60603‑7‑2 / 7‑3 detail specifications for 8‑way connectors (shielded/unshielded) intended for up to 100 MHz operation.
Applications and users
EN 61935-2-20 is practical for:
- Cable and connector manufacturers preparing product data sheets and detail specifications for Class D patch cords/work‑area cords.
- Test laboratories implementing standardized cord test procedures aligned with IEC/EN 61935 series.
- Specification writers and procurement teams creating technical procurement documents for premises cabling projects.
- Installers and system designers who need consistent technical descriptions to ensure compatibility with EN 50173‑based cabling systems.
Keywords: EN 61935-2-20, IEC 61935-2-20, work area cord, patch cord, Class D, Category 5e, testing, balanced communication cabling, EN 50173, 100 MHz.
Related standards
- EN 50173-1 / EN 50173-3 (generic cabling series)
- IEC/EN 61935‑2 (test procedures for patch cords and work‑area cords)
- IEC 61156 series (cable sectional specs)
- IEC 60603‑7‑2 / 60603‑7‑3 (8‑way connector detail specs)
- EN 50289‑1‑13 (coupling/screening attenuation test methods)
