“In a 240-volt panel, the multimeter determines whether a breaker or circuit is receiving the correct voltage,” says Vasilevski. “It works by measuring the electrical potential between two ...

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.

When it comes to choosing a multimeter for servicing refrigeration systems, there are a lot of choices on the market. Careful planning should go into selecting the right meter.

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?

Snap-on ’s new EECT900 Multi-Probe Ultra features a circuit tester and digital multimeter in one handheld device for testing AC and DC voltage, resistance, and amperage.