The market is full of cable cleats described as "compliant with IEC 61914." There is a significant difference between a product that carries the declaration and one that has been put through the laboratory programme the standard requires. Procurement engineers who do not know what the standard actually tests cannot use it to filter suppliers — and that gap is where underperforming products get specified.
§ 01 Scope of IEC 61914
IEC 61914 Cable Cleats for Electrical Installations is the IEC standard defining performance requirements, test methods, and marking rules for devices used to secure and support electric power cables rated 1 kV and above. It applies to all materials — polymer, metallic, and composite — and to cleats for single-core, multicore, and trefoil arrangements.
A supplier citing IEC 61914 compliance without a test report has made a declaration only. The standard's value to the buyer is entirely dependent on those reports existing.
§ 02 Classification system: material × strength
IEC 61914 classifies cleats on two axes:
- Material category: Polymeric (P), Metallic (M), or Composite (C) — this determines which environmental test requirements apply;
- Short-circuit withstand class: defined by the peak current (kA) the cleat must sustain; common levels include 10, 25, 40, and 63 kA peak.
The selected cleat must have a withstand class at or above the system peak fault current iₚ = κ × Isc.
§ 03 Short-circuit withstand test: the core verification
This is the most technically demanding test in the standard and the one that most differentiates genuine compliance from a self-declaration:
Build the test circuit
Cleats installed at rated spacing on a representative support; standard test cables clamped per normal installation.
Apply the rated peak current
The circuit is energised to produce the declared peak fault current for the number of cycles specified by the standard.
Inspect for integrity
After the test: no fracture, no opening of the cleat, and no cable displacement beyond the specified limit.
Record and report
Test data forms a type-test report. The rated kA value and the maximum installation spacing are both declared — they are inseparable.
The kA rating and the installation spacing are always paired. Using a larger spacing than declared invalidates the rating.
§ 04 Environmental and mechanical tests
Beyond the short-circuit test, IEC 61914 requires:
- Corrosion resistance: metallic cleats tested per ISO 9227 (salt spray); the standard specifies minimum test hours by exposure category;
- Temperature resistance: cleat must maintain mechanical performance across its rated temperature range;
- UV weathering: polymeric cleats must pass UV ageing tests confirming the material will not become brittle outdoors — this is the basis for UV-stabilised grades;
- Clamping force: cleat must exert adequate grip on the declared cable OD range without over-compressing the sheath.
§ 05 What procurement should demand beyond the citation
Specifying "IEC 61914 compliant" in a procurement document without further requirements leaves the standard as unenforceable decoration. Effective procurement should require:
- A type-test report from an accredited laboratory, identifying the peak current tested and the installation spacing used;
- The declared kA class and maximum spacing explicitly stated in the product datasheet — both figures, not just kA;
- Corrosion and UV test evidence appropriate to the installation environment.
For how to use the declared kA figure in practice, see Cable Cleat Selection Parameters.