ELECTRICITY BOARDS :  Tamil Nadu, Andhra,  kerala & Pondicherry.

  MUNICIPAL CORPORATIONS : Chennai, Madurai, Coimbatore, Trichy,         Tirunelveli & Salem

  MUNICIPALITIES & PANCHAYATS : All Municipalities & panchayat Unions       & Town Panchayats in the state of  Tamilnadu

  GOVT. DEPARTMENTS : CPWD, PWD, P & T, Indian Railways, Nuclear       Corporation, Vikram Sarabhai Space Centre, All India Radio, Ordinance Factory,       Shar Centre, Dept. of Atomic Energy etc.

  PUBLIC SECTOR :  NLC, NHPC, HAL, BHEL, ONGC, IDPL, IBP, ICF,       NTPC LTD., NAVAL & AIR STATIONS, Power Grid Corporation of India,       L.I.C., Banks, Hospitals & M.E.S etc.

  PORT TRUST : Chennai, Tuticorin & Cochin.

   PRIVATE PARTIES : Sugar, Cotton & Textile Mills, Cement Factories,         Educational Institutions, Interior Decorators, Architects, Hotels, Resorts,       Electrical Contractors.

  STATE TRANSPORT CORPORATIONS : PATC, DATC, & TNSTC ETC.

  SHIP YARDS : Hindustan Shipyard, Cochin Shipyard etc.