Overview
IEC 62255-5-1:2005 is the blank detail specification for filled drop cables used in outside plant installations for broadband digital communications and high bit rate digital access telecommunication networks. Rather than specifying numeric limits itself, this document defines the layout, style and required information fields that national bodies, manufacturers or users should complete when preparing a detailed product specification for multicore and symmetrical pair/quad cables (filled drop cables).
The standard ensures consistent presentation of technical and commercial requirements so that filled drop cables can be specified, procured and tested in a repeatable, interoperable way.
Key topics and requirements
IEC 62255-5-1 organizes the detail specification into clearly numbered fields and characteristic groups. Key topics include:
- Document and administrative data: preparer, issue number, availability and related documents.
- Cable description and construction: conductor, insulation, sheath, filling/flooding compounds, screening, strength members, identification and packaging.
- Installation and mechanical limits: minimum bending radius (static/dynamic), temperature ranges, and mechanical make-up.
- Electrical and transmission characteristics grouped by subclauses:
- Conductor resistance, insulation resistance, dielectric strength
- Mutual capacitance, capacitance unbalance, delay skew
- Frequency-based transmission limits (attenuation, return loss, characteristic impedance) across referenced frequencies (e.g., 1–100 MHz)
- Crosstalk metrics: near-end (PSNEXT) and far-end (PSELFEXT)
- Screening attenuation and transfer impedance
- Mechanical / dimensional tests: elongation, breaking strength, crush, bending, impact, sheath adherence and integrity.
- Environmental tests: thermal oxidative stability, thermal ageing, cold bend, water penetration, wicking, UV resistance, compound flow and compatibility with filling/flooding materials.
The blank spec uses placeholders (NA, NS) and cross-references the sectional specification IEC 62255-5 and the generic IEC 62255-1 for normative requirements.
Applications
Use IEC 62255-5-1 when you need to:
- Create a manufacturer or purchaser detail specification for filled drop cables in outside plant broadband networks.
- Standardize procurement documents and test plans for multicore and symmetrical pair/quad cables.
- Ensure consistent technical communication between telecom operators, manufacturers and test laboratories.
Who should use this standard
- Cable manufacturers preparing product datasheets and factory test criteria
- Telecom network planners and procurement engineers specifying outside plant drop cables
- Test laboratories and quality assurance teams developing acceptance test procedures
- National standards bodies adapting IEC specifications into local detail specifications
Related standards
For the official text and to prepare compliant detail specifications, obtain IEC 62255-5-1:2005 from the IEC Webstore or the IEC Catalogue.