1. Telephone switchboard, electric equipments, medical- Equipments, power instruments and meters
2. Computer, uninterrupted power source (UPS)
3. Power transmission and transformer station, switch- Control, and accident lighting
4. Fire fighting, safety device, and alarm monitoring

5. Automatic office system
6. Radio communication system
7. Emergency lighting and car/ship starting system
8. Portable electric appliances and mining system
9. Traffic and navigation signal lamp