What voltage is this?

You are installing a new computer at a remote office in another country. What’s the best way to determine the voltage of the wall outlet power source and how can you configure the computer for best results?

A) Plug in the computer and see if it starts. If it doesn’t, change the voltage switch on the power supply and try again.

B) Use a multimeter to determine the wall outlet voltage and set the computer’s power supply to match.

C) Check with the office staff to determine the wall outlet voltage and set the computer’s power supply to match.

D) Contact a licensed electrician to determine the wall voltage and set the computer’s power supply to match.

E) Power is dangerous. Don’t ever use anything electrical. Perhaps you should consider a job working outside somewhere.

The answer: B) Use a multimeter to determine the wall outlet voltage and set the computer’s power supply to match.

It only takes a few seconds to determine the wall voltage with a multimeter. If the power supply has a voltage switch, set the switch to match the results from the multimeter. If you have questions about the capabilities of the computer’s power supply, check the power supply or computer documentation for more detailed specifications. When it comes to power, you should never guess!

Want to know more? Watch “Installing and Troubleshooting Computer Power.” Troubleshooting power problems with personal computers goes well beyond the power cord. In this module, we’ll show you how to use a circuit tester and multimeter to troubleshoot power on the motherboard , the PC components, and the power outlets themselves. You’ll also learn about power protection systems and the process for installing a PC power supply.