CEIG Approval in Telangana: Drawings, Testing and Energisation

1. What the Inspectorate Is and Where Its Authority Comes From

The Chief Electrical Inspector to Government is a statutory office notified by the state, deriving its authority from Section 162 of the Electricity Act, 2003, and exercised through the Electrical Inspectorate. Its remit is safety: verifying that installations comply with the applicable safety regulations, that clearances are maintained, that protection and earthing are adequate, and that the installation will not endanger persons or property. It is independent of the distribution licensee. Clearing your utility formalities does not clear your Inspectorate obligations, and vice versa; both run in parallel and both are required.

2. When Approval Is Required

Approval requirements are keyed to the nature and capacity of the installation. HT installations, transformers, HT motors and overhead lines fall within scope, and thresholds for capacity vary between states. Any project with a consumer substation, a transformer yard, or high-voltage apparatus should assume it is in scope and verify the current threshold with the jurisdictional Inspectorate office rather than relying on a figure quoted from another state. Generator installations, medium-voltage distribution in large buildings, and additions to existing sanctioned installations frequently attract requirements that owners do not anticipate.

3. The Drawing Approval Stage

Drawings are submitted before installation work begins, through a licensed electrical contractor. The submission typically covers the substation layout with equipment positions and statutory clearances, the single line diagram from incoming point through protection to distribution, the protection and relay coordination scheme, the earthing layout with electrode positions and conductor sizing, and details of the cable routes. Approval may come with conditions. Those conditions are binding, and the installation that is later inspected must match the approved drawings, so revisions made on site during construction have to be carried back into the approved set rather than left as an undocumented deviation.

4. The Completion and Test Report

Once the installation is complete and tested, the licensed electrical contractor issues a Completion and Test Report in the prescribed form. This is a signed technical declaration, not a formality: it records insulation resistance values, earth electrode resistance readings, protection relay settings and trip verification, transformer test results, polarity and continuity checks. The owner submits it with an undertaking that the installation is ready for inspection. Thin or internally inconsistent test records are one of the most common reasons an inspection stalls, because the Inspector has nothing reliable to verify the installation against.

5. Pre-Energisation Inspection and Why Installations Get Held

The pre-energisation inspection is a physical verification against the approved drawings and the submitted test results. Applications for inspection are expected in advance of the anticipated completion date, not on the day the site is ready. The recurring reasons installations are held are predictable: clearances reduced during construction to fit equipment into available space, earthing electrodes installed short of the designed count or reading higher resistance than declared, protection settings left at factory defaults, missing danger boards, first-aid and shock treatment charts, insulating mats and fire extinguishers, and as-built arrangements that differ visibly from the approved layout. Every one of these is avoidable by inspecting your own installation against the approved drawings before calling for the statutory visit.

Frequently Asked Questions