Overview
IEC 61935-3:2008 - Testing of balanced and coaxial information technology cabling (Part 3) defines conformance testing for home cabling as specified in ISO/IEC 15018. The standard covers installed balanced (twisted‑pair) and coaxial cabling and specifies visual inspection, verification testing, and either qualification or certification testing, plus the required documentation of results.
Key topics and requirements
- Scope: Conformance testing for home generic cabling systems supporting data, voice, video and control applications.
- Inspection stages:
- Visual inspection: Performed after installation and before insulation/drywall; checks for physical damage, incorrect bend radius, EMC separation and excessive cable length.
- Verification testing: Performed after cable placement and prior to drywall. Ensures end‑to‑end connectivity and absence of shorts; includes continuity, length, wire map (crossed/reversed/split pairs), and screen continuity.
- Qualification vs Certification:
- Qualification testing: Confirms support for specific network technologies (e.g., 10/100/1000BASE‑T, IEEE 1394). Field testers used for qualification are not required to have traceable accuracy to national standards.
- Certification testing: Verifies conformance to ISO/IEC 11801 cabling classes (for example, Class D measured 1 MHz–100 MHz) using field testers with traceable accuracy. Measures parameters such as insertion loss, NEXT, PSNEXT, ELFEXT, delay, delay skew and return loss.
- Field tester parameters: Wire map, length, continuity, shorts, transposed/reversed/split pairs and screen continuity; testers should summarize results and generate documented reports.
- Documentation: Test summaries must be provided to the homeowner and retained in the home distribution center.
Applications and users
IEC 61935-3:2008 is practical for:
- Residential cabling installers and contractors - to ensure installations meet conformance requirements and to avoid common installation faults.
- Field technicians and test equipment vendors - for specifying required test functions and reporting formats for qualification/certification instruments.
- Homebuilders and system integrators - to validate cabling that will support ICT (Ethernet), telephony (analogue/ISDN/DSL), broadcast (VHF/UHF up to 862 MHz), satellite, CCTV, FM and control systems.
- Homeowners and network owners - to receive documented assurance that installed cabling can support intended services.
Related standards
- ISO/IEC 15018 - Generic cabling for homes (installation topology and links referenced by IEC 61935-3).
- ISO/IEC 11801 - Generic cabling for customer premises (used for certification test limits).
- IEC 60728 series - Coaxial cable network system performance and EMC.
Keywords: IEC 61935-3:2008, home cabling, conformance testing, verification testing, qualification testing, certification testing, ISO/IEC 15018, wire map, twisted‑pair, coaxial, field tester, documentation.
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