Engineer Evaluation Medium risk

WV-2026-0142 — Pull-test alternative for MV cable joints

Affected: SES-D-101 / Clause 4.3.2 · Requested by Al-Yamamah Electric · Due in 2 days

Workflow

Requester
Apr 19
Proponent
Apr 21
Division Mgr
Apr 24
Engineer
In progress
Dept Mgr
—
Executive Director
—

A Request details

Requester

Al-Yamamah Electric Co.

Affected standard

SES-D-101 — MV Cable Joints (Rev 4)

Clause reference

4.3.2 — Mechanical pull test

Validity period

12 months from approval

Proposed alternative approach

Replace longitudinal pull test (30 N/mm² × 1h) with combined cyclic-pull procedure per IEC 61442 Annex D, demonstrating equivalent or higher mechanical integrity over 100 cycles.

Impact assessment

No impact on installation procedures. Test equipment already deployed at SEC Test Lab — no additional capex required.

B Justification

The proposed cyclic-pull procedure has been used internationally since 2018 and is recognized by IEC 61442 Annex D as equivalent or superior for MV joint mechanical qualification. SEC Test Lab has previously evaluated five vendor samples under this method (Reports CL-2024-07, CL-2024-08, CL-2024-09) with conformance correlation of 0.94 to the SES-D-101 procedure.

The cyclic procedure better reflects in-service stress profiles observed in the Eastern Province field surveys (FS-2025-Q1) and would reduce false-fail rates by an estimated 18% based on lab data.

Supporting evidence

SEC Test Lab Reports CL-2024-07 through CL-2024-09 are attached. Field correlation data from Al-Yamamah's installations between 2022–2025 is included in Annex 2.

Previous deviations on this standard

3 found

WV-2024-088 — Cable joint dimension tolerance

Approved · 2024-07-12 · Validity 24mo

View
WV-2023-021 — Alternative crimp connector

Approved · 2023-03-04 · Validity 12mo (expired)

View
WV-2022-114 — Adhesive material substitution

Rejected · 2022-09-30

View