IEC 60227-4:2024

Overview

IEC 60227-4:2024 - "Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V - Part 4: Sheathed cables for fixed wiring" specifies particular requirements for light PVC‑sheathed cables intended for fixed wiring with a rated voltage of 300/500 V. It is part of the IEC 60227 series and is to be used in conjunction with IEC 60227-1 (General requirements). Test methods for the series are referenced to IEC 63294.

Key topics and technical requirements

• Scope and designation
  • Code designation: 60227 IEC 10.
  • Rated voltage: 300/500 V for sheathed cables for fixed wiring.
• Construction requirements
  • Conductors: 2, 3, 4 or 5 conductors complying with IEC 60228 (class 1 for solid; class 2 for stranded).
  • Insulation: PVC compound type PVC/C around each conductor.
  • Inner covering: Extruded unvulcanized rubber or plastic covering over twisted cores; cores must be separable.
  • Sheath: PVC compound type PVC/ST4 applied over the inner covering; sheath must fit closely and be removable without damaging inner covering.
• Dimensional and electrical data
  • Table 1 (in the standard) gives insulation and sheath thicknesses, mean overall diameter limits, and minimum insulation resistance for specified conductor cross‑sectional areas (examples included in the standard).
• Tests and conformity
  • Compliance is verified by type tests (T) and sample tests (S) as listed in Table 2.
  • Normative test references include IEC 63294 (cable test methods), the IEC 60811 series (non‑metallic material tests), and IEC 60332‑1‑2 (vertical flame test).
• Operational guidance
  • Temperature in normal use: 70 °C.
  • Guidance on safe use is provided via IEC 62440.

Applications and practical value

• Intended use: fixed wiring applications where PVC‑sheathed cables up to 300/500 V are required - e.g., building wiring, lighting circuits and other installed power circuits within the rated voltage and temperature limits.
• Practical benefits:
  • Ensures consistent mechanical, electrical, and fire‑performance properties.
  • Enables manufacturers to design and test cables to internationally recognized specifications.
  • Assists specifiers, procurement teams and regulators in selecting compliant PVC sheathed cables.

Who should use this standard

• Cable manufacturers and designers
• Test laboratories and conformity assessors
• Electrical contractors and installation engineers
• Procurement specialists and regulatory bodies specifying fixed‑wiring cables

Related standards

• IEC 60227-1 (General requirements)
• IEC 60228 (Conductors)
• IEC 63294 (Test methods for cables up to 450/750 V)
• IEC 60811 series (Non‑metallic material tests)
• IEC 60332-1-2 (Flame propagation test)
• IEC 62440 (Guide to use)

Keywords: IEC 60227-4:2024, PVC sheathed cables, sheathed cables for fixed wiring, 300/500 V, PVC/C, PVC/ST4, IEC 60227 series, IEC 63294.