Safety Precautions When Checking a Fuse

Since a fuse has current through it, you must be very careful when checking for an open fuse to avoid being shocked or damaging the circuit. The following safety precautions will protect you and the equipment you are using.

• Turn the power off and discharge the circuit before removing a fuse.
• Use a fusepuller (an insulated tool) when you remove a fuse from a clip-type fuseholder.
• When you check a fuse with a voltmeter, be careful to avoid shocks and short circuits.
• When you use an ohmmeter to check fuses with low current ratings, be careful to avoid opening the fuse by excessive current from the ohmmeter.