| Publisher | IEC |
|---|---|
| Type | Standard (multi-part international series) |
| Scope | Construction, dimensions and test requirements for power cables with extruded solid insulation for rated voltages from 1 kV up to 30 kV, and test requirements for their accessories. |
| Who uses it | Cable manufacturers, utility and industrial engineers, specifiers, testing laboratories, cable installers and jointers. |
| Edition note | Each part of the series has its own edition. Refer to the publisher for the current edition of each part. |
What It Is
IEC 60502 is the international series covering power cables with extruded insulation and their accessories in the low- and medium-voltage range. IEC 60502-1 covers cables for rated voltages of 1 kV and 3 kV. IEC 60502-2 covers cables from 6 kV up to 30 kV. IEC 60502-4 sets test requirements for accessories, such as joints and terminations, for cables from 6 kV up to 30 kV.
The cable parts specify construction elements, including conductors, insulation materials such as XLPE, EPR and PVC, semiconducting screens, metallic screens, armor and sheaths, together with dimensions and tests. Testing is organized into routine tests on every length, sample tests on selected lengths and type tests to qualify a design. Tests after installation are also addressed. Cable voltage ratings are expressed using a designation that relates the conductor-to-screen voltage, the conductor-to-conductor voltage and the highest system voltage.
Why It Matters
Much of the medium-voltage cable installed worldwide is specified to IEC 60502. Correct specification ensures the cable is suited to the system voltage, earthing arrangement, installation conditions and fault levels. Selecting an accessory tested to the matching part of the series helps ensure the joint or termination is as reliable as the cable.
For jointers and technicians, understanding cable construction under IEC 60502 explains why preparation steps such as screen removal, semiconducting layer termination and armor bonding matter so much to long-term performance. The series also gives a common reference for comparing cables from different manufacturers and for resolving disputes about whether a delivered cable meets specification. Test reports referencing the correct part and clauses of IEC 60502 are a normal part of procurement and acceptance documentation on international projects.
Key Concepts
- Rated voltage designation — the paired voltage values used to describe a cable's design for conductor-to-earth and conductor-to-conductor stress, along with the highest system voltage.
- Extruded insulation — polymeric insulation such as XLPE or EPR applied by extrusion, often with semiconducting screens on each side.
- Screens and armor — semiconducting and metallic screens control electric field and carry fault current; armor provides mechanical protection.
- Routine, sample and type tests — a layered testing regime covering every production length, selected samples and design qualification.
- Accessory testing — IEC 60502-4 defines test sequences for joints and terminations to demonstrate compatibility and reliability.
- Tests after installation — voltage tests and related checks that confirm the installed system before it enters service.
- Conductor and insulation materials — copper or aluminum conductors combined with insulation compounds whose temperature ratings determine current-carrying capacity.
Who Should Know It
- Cable jointers and termination technicians
- Utility and industrial distribution engineers
- Procurement and specification engineers
- Cable test technicians
- Quality inspectors for cable manufacture and installation
Related Standards
- IEEE 404 — the IEEE standard for cable joints, often compared with IEC 60502-4 for accessory testing.
- IEEE 400.2 — VLF field testing used on installed medium-voltage cable systems.
- IEC 60840 — the IEC standard for extruded insulation cables above 30 kV up to 150 kV.
- IEC 60228 — the IEC standard for conductors of insulated cables, referenced for conductor classes and resistance.
How ASEEE Uses It
ASEEE cable programs map learning outcomes and assessments to IEC 60502 concepts, including cable construction, voltage designations, accessory requirements and testing, supporting safe and reliable jointing and termination work. See related ASEEE programs.
ASEEE Programs Referencing This Standard
- 3M HV Cold Shrink Cable Accessories: Train the Trainer
- 3M Medium & High Voltage Cold Shrink Cable Accessories
- High Voltage Cable Jointing and Termination
- Raychem LV/HV Cable Accessories Installation
- VLF AC Hipot Testing of HV Cables
Educational summary only. ASEEE is not the publisher of this document and this page does not reproduce or replace it. Always consult the current official edition from IEC for requirements.