Electrical Equipment Useful Life
Useful Life
The useful life of electrical equipment refers to the period during which the equipment is expected to function properly and efficiently under normal operating conditions. It is the duration over which the equipment provides reliable service before it becomes obsolete, inefficient, or requires replacement due to wear and tear, technological advancements, or changing operational requirements.
| System | Average Useful Life (Years) | |
|---|---|---|
| 1. | Electric Motors | 18 |
| 2. | Electric Transformers | |
| a. Oil-Filled | 30 | |
| b. Dry Type | 30 | |
| 3. | Motor Control Center | 30 |
| 4. | Automatic Transfer Switch | 25 |
| 5. | Uninterrupted Power Supply | |
| a. Battery | 10 | |
| b. Rotary | 15 | |
| 6. | Batteries | 15 |
| 7. | Power Panels | |
| a. Light and Power Distribution Panels | 30 | |
| b. Switchgear and Service Entrance Equipment | 40 | |
| 8. | Circuit Breakers | 30 |
| 9. | Light Fixtures | 20 |
| 10. | Emergency Engine Generator Set | 20 |
| 11. | Ground Fault Circuit Interrupter | 25 |
| 12. | Wire and Cable | |
| a. 600V and below | 40 | |
| b. Above 600V | 30 | |
| 13. | Solar Photovoltaic Collector Panels | 20 |
| 14. | Branch Circuit Wiring and Devices | 30 |
| 15. | Lightning Protection | 40 |
| 16. | Fire Alarm Systems | |
| a. Activation Devices (Pull Station, Smoke Detector) | 10 | |
| b. Notification Devices (Av Horn/Strobe) | 15 | |
| c. Control Panels | 15 | |
| d. Wiring | 30 |
Notes:
- Source: BOMA Preventative Maintenance Guidebook