A multimeter is a powerful tool for measuring electrical values such as voltage, resistance, and current, commonly used in ...

Using the multimeter at the one box will allow you to discover which of the wires is the continuous hot wire that has power when the circuit breaker is on. Mark this wire once you determine this.

AFCI (Arc Fault Circuit Interrupter) breaker switches: This type of specialized breaker is made to detect the unique voltage and current produced by arcing. If the switch detects arcing, it will ...

Using a non-RMS meter on these loads can cause a lower-than-true value — up to 40-percent lower in some cases. Therefore, the next time you need to purchase a multimeter, spend some time looking at ...

Use this guide to find out what the switches on your breaker mean so you can take better control of your house. Related: How to Reset a Tripped Circuit Breaker What Is a Breaker Panel?