| Schneider Electric India (P) Ltd. | |
| Luminous Power Technologies (P) Limited | |
| Secure Meters Ltd. | |
| BEETEL (Brightstar) Tele. India Ltd.. | |
| Microtek International Limited | |
| Havells India Ltd. | |
| Exide Industries Ltd. | |
| Su-kam Power System Ltd. | |
| Amara Raja Electronics Ltd. | |
| HPL Electric & Power Pvt. | |
| Genus Power Infrastructures Ltd. | |
| V-Guard Industries Ltd. | |
| True Power International Ltd. | |
| Arise India Ltd. | |
| Flextronics Technologies Pvt. Ltd. | |
| Samsung India Pvt. Ltd. | |
| I.T.I. Ltd. | |
| TEI Technologies Pvt. Ltd. (Tyco Group) |
| Larsen & Toubro Limited | |
| Landis+Gyr Ltd. | |
| Minda Corporation Ltd. | |
| Pricol Ltd. | |
| Flash Electronics India Pvt. Ltd. | |
| Kaynes India (P) Ltd. | |
| Deltron (A Div. of Continental Device Ltd.) | |
| SGS Tekniks Manufacturing (P) Ltd. | |
| Digital Circuits Pvt. Ltd. | |
| Crompton Greaves Ltd. | |
| UTL Power System Priyaraja Electronics Ltd. | |
| Priyaraja Electronics Ltd. | |
| Siemens Ltd. | |
| BCH Electric Ltd. | |
| BPL Telecom Ltd. | |
| Salzer Electronics Ltd. | |
| BSNL & MTNL Defence | |
| Defence |