CEIG Approval
CEIG approval is the Electrical Inspectorate's statutory clearance — drawings approved and installation inspected — required before energising HT installations, transformers, DG sets and other specified electrical works under the CEA Safety Regulations 2023.
Why it matters on an MEPF project
Energising a covered installation without Inspectorate approval is the most consequential shortcut in industrial electrification: it exposes the occupier legally, voids the safety chain the 2023 Regulations construct, and surfaces at the worst moments — accidents, insurance claims, expansion applications. The regime is two-touch: drawing approval before construction/energisation, then physical inspection with test evidence.
Files bounce for predictable reasons: SLDs that disagree with reality, earthing designs without test values, protection settings unstated, missing test certificates for transformers and breakers. The inspector's checklist is knowable in advance — which is why a pre-check of the file against it converts a multi-cycle ordeal into a single visit.
How it's specified in practice
| Parameter | Typical / working position | Governing reference |
|---|---|---|
| HT connection / substation | Always covered | CEA (Safety) Regulations 2023 + state procedure |
| Transformers | Installation approval + inspection | same |
| DG sets | Covered above state-specified thresholds | state Inspectorate rules |
| Large solar plants | Capacity thresholds per state practice | state Inspectorate rules |
Common mistakes
- Energising "temporarily" before approval — the word does not exist in the regime.
- Submitting the consultant's SLD while site reality has moved on.
- Earthing shown on drawings but never measured for the file.
- Treating each addition (new DG, solar) as exempt because the original was approved.
Related on this site
One of 68 working definitions in the MEPF & solar engineering glossary. The buying side of the same decisions is in the buyer's guides; the numbers are in the calculators.
Frequently asked
How long does CEIG approval take?
Preparation is days-to-weeks if records exist; authority stages vary by state workload. The controllable variable is a first-time-complete file — our readiness checker walks the same checklist the inspector uses.
Does a rooftop solar plant need CEIG?
Above state-specified capacity thresholds, yes — as part of interconnection. Below them, the DISCOM process alone may suffice. Check your state's current practice; we verify it per project.
Standards referenced: CEA (Safety) Regulations 2023 · State Electrical Inspectorate procedures