Load size can be determined by either of these methods:
- Measure the load with a current clamp to obtain the full load current (I).
- Look at the rating plate on the rear of the equipment and find the current consumption, or ask the manufacturer, add up all load to be supplied.
To ensure the product selected is sufficiently large enough to supply the load use the following calculations:
Single Phase – Multiply volts (V) by the full load current (I) to give you the power (W).
Three Phase – We would recommend you contact us to calculate this power requirement. sales@abilitypower.co.uk
NB. Selection of the correct emergency backup power equipment is essential. Not all power products are suitable to supply all load types. To ensure correct selection call us on 0845 868 7345 or email us.
The table below gives indicative power consumptions of common IT equipment:
| TYPICAL DEVICE POWER (W) | |
| PC & Workstations | |
| Home PC | 104 |
| Desktop PC | 100 |
| Minitower PC | 121 |
| Workstation PC | 201 |
| Unix Workstation Desktop | 234 |
| Unix Workstation Tower | 586 |
| Printers | |
| Colour Laser Printer | 446 |
| Impact Printer | 74 |
| Inkjet Printer | 23 |
| Multifunction Printer | 37 |
| Office Laser Printer | 221 |
| Network Colour Laser Printer | 1005 |
| Scanner A4 | 47 |
| Scanner A3 | 100 |
| Monitor | |
| 14-15″ CRT | 60 |
| 14-15″ LCD Flat panel | 37 |
| 16-17″ CRT | 60 |
| 16-21″ LCD Flat panel | 72 |
| 18-19″ CRT | 107 |
| 20-21″ CRT | 161 |
| 22-24″ LCD Flat panel | 100 |
| 30-36″ CRT | 234 |
| Server | |
| Unix Host | 281 |
| PC Server | 281 |
| Appliance Server | 74 |
| Network PC Server | 570 |
| Network Unix Host | 570 |
| Enterprise PC Server | 737 |
| Enterprise Unix Host | 737 |
| Small PC Server | 214 |
| Telco Server | 335 |
| Supercomputers | 1675 |
| Internetwork | |
| Remote Access Server | 214 |
| Router | 147 |
| Hub | 37 |
| 100 lines PBX | 300 |
| Fax | 100 |
| Switch | 37 |
| Wan switch | 295 |
