IEC 60317-0-2:2020

Overview

IEC 60317-0-2:2020 - Edition 4.0 - is the International Electrotechnical Commission standard that specifies the general requirements for enamelled rectangular copper winding wire. This technical revision (replacing the 2013 edition) defines conductor dimensional ranges, mechanical and electrical performance criteria, test conditions and appearance for enamelled rectangular copper wire used in electrical windings.

Key topics and technical requirements

The standard covers a comprehensive set of requirements and test topics aligned with winding‑wire practice and IEC test methods (IEC 60851 series). Major technical subjects include:

• Conductor dimensions and tolerances (Clause 4, nominal sizes given in 4.1 and Annex A)
• Corner radii and increases in dimensions due to insulation and a newly defined bonding layer (Clauses 3.1, 4.3–4.5)
• Electrical resistance and continuity of insulation (Clause 5, 14)
• Mechanical properties: elongation, proof strength, springiness (Clauses 6–7)
• Flexibility and adherence tests, including revised adherence test requirements (Clause 8)
• Thermal performance: heat shock, temperature index (Clauses 9, 15; reference IEC 60172)
• Durability tests: cut‑through, abrasion, resistance to solvents and refrigerants, solderability (Clauses 10–13, 16–17)
• Dielectric tests: breakdown voltage, dielectric dissipation factor, pin hole test (Clauses 13, 19, 23)
• Packaging requirements (Clause 30)

Significant 2020 changes include added normative references for copper rod specifications (EN 1977, ASTM B49, ISO 1190-1), the new “bonding layer” definition and related dimensional requirements, updates to test conditions and proof‑strength considerations, and enhanced cross‑references to specification sheets.

Practical applications and who uses it

IEC 60317-0-2 is essential for:

• Winding wire manufacturers producing enamelled rectangular copper wire to meet international quality and interchangeability expectations.
• Design engineers specifying winding wire for transformers, motors, inductors, solenoids and power‑electronics windings.
• Test laboratories and QA teams performing mechanical, electrical and thermal tests per IEC 60851 methods.
• OEMs and procurement professionals ensuring supplier compliance and consistent performance across batches.
• Certification bodies and standards committees referencing harmonized test and dimensional criteria.

Using this standard helps ensure reliable insulation performance, manufacturability, and compatibility in electrical windings across industrial and consumer electrical equipment.

Related standards

• IEC 60851 (all parts) - Winding wires - Test methods
• IEC 60172 - Temperature index test procedure
• ISO 1190-1, EN 1977, ASTM B49 - copper rod/drawing stock specifications

Keywords: IEC 60317-0-2, enamelled rectangular copper wire, winding wires, conductor dimensions, bonding layer, IEC 60851, transformer wire, motor winding wire, insulation tests.