Tamil Nadu Electrical Inspectorate: Procedure for Drawing Approval

Competent Authority

  • Tamil Nadu Electrical Inspectorate (TNEI)


  • Pre – Establishment

Approving Authority

  • Upto 630 kVA – Electrical Inspector
  • 630 – 2500 kVA – Senior Electrical Inspector
  • Above 2500 kVA – Chief Electrical Inspector

Procedure & Documents Required

  • Applicant to fill the online form on the Single Window Portal and upload the following documents
    • Copy of Memorandum and Articles of Association of the Company.
    • Brief details of proposal for setting up new enterprise or expansion of existing enterprise.
  • Applicant to make the necessary online payment and submit the form on the Single Window Portal
  • Applicant shall submit (by Speed Post) 4 copies of documents (mentioned below) relevant to their enterprise to the concerned TNEI office
    • Site plan showing point of supply, H.T. installation routes of main (Over Head & Under Ground) & Topo plan.
    • Plan and elevation of substation with clearance to nearby buildings or structures.
    • PSchematic layout of the equipments.
    • Sectional elevation of switch gears with erection details.
    • Earthing arrangements.
    • If the building height exceeds 15m, Details of planning permit and drawing approval obtained from the DTCP / CMDA Authority.
    • If the installation is having Ground +3 floors and above, Elevation drawing indicating the total height of the building.
  • Applicant shall enter Speed Post details on the portal for the application to be tracked
  • TNEI Officer confirms receipt of hard copies by speed post
  • TNEI officer validates payment details and shall raise clarification on payment, if any
  • TNEI officer shall issue the Drawing Approval online on the Single Window portal
  • Applicant can download the Drawing Approval letter from the Single Window portal

Process Time

  • 5 days

Process Fees

  • Based on Equipment