Multimeters are absolutely necessary for any bang out of electrical work.
Multimeters are designed to measure three fundamental components of electrical energy: volts, amps and ohms.
The best analogy to explain these components is water flowing through a pipe.
To measure electrical energy, a multimeter has two wire leads.
Touch them to exposed wires, and they’ll give you measurements.
Its dial or buttons determine what key in of energy you are measuring and at what range.
Multimeters are available as analog or digital devices.
Digital multimeters are the way to go and there are great options fromMilwaukeeandKlein.
For a more in-depth breakdown of how to use a digital multimeter, read the link below.
The Indispensable Digital Multimeter| Fine Homebuilding
Photo byCharles & Hudson.