The field problem
Mostakbal City Residential Development
Within a short period after installation, an opened earth pit showed visible corrosion products/debris around the rod and clamp/coupler area, although the network could still show continuity and acceptable initial resistance.
why the obvious answer can be misleading
Electrical acceptance does not prove coating integrity, alloy composition, corrosion resistance or service life. Early deterioration is a material-conformity warning that requires evidence, not an immediate unsupported accusation of counterfeit material.
Why it failed
Electrical acceptance does not prove coating integrity, alloy composition, corrosion resistance or service life.
Early deterioration is a material-conformity warning that requires evidence, not an immediate unsupported accusation of counterfeit material.
Follow the engineering
Switch between the field condition and the engineering concept. Trace the path and examine what changes.
Inspect the engineering detail
What changes
Quarantine/scope the concern, take representative samples, check traceability and approved submittals, and use accredited laboratory tests for coating/material/alloy/mechanical requirements.
Correction & verification
Quarantine/scope the concern, take representative samples, check traceability and approved submittals, and use accredited laboratory tests for coating/material/alloy/mechanical requirements.
Inspect earth-pit housings and covers for application-appropriate mechanical durability as well.
Verification recorded in the case
- Compare laboratory results with the project-specified standard edition and product classification. Expand inspection if non-conformity is confirmed.
- Record as-built topology and connection points.
- Repeat the measurement or functional test under a defined condition.
- Confirm continuity and mechanical integrity of the corrected path.
- Document instrument/setup, environmental condition and test method.
- Close the NCR/case only when evidence supports the conclusion.
References & project context
References are reproduced from the PIS casebook. Select the governing edition and project acceptance criteria before using them for a design. The diagrams explain the concept, rather than define construction dimensions.
IEC 62561-1, IEC 62561-2 and IEC 62561-5 where applicable; project-approved material specification.
PIS reviewed field handbook · PIS-CS-038
The engineering lesson
Passing today’s test does not guarantee tomorrow’s reliability.
Take the lesson into your next design review.