What should be checked before using a circuit tester?

Before using a circuit tester, it is essential to check the condition of the tester leads. The leads are the crucial components that connect the tester to the electrical circuit. If the leads are damaged, frayed, or have poor connections, it can lead to inaccurate readings or even potential safety hazards. Properly functioning leads ensure that the tester can accurately measure voltage, resistance, or current.

Ensuring that the tester is in good working order, particularly the leads, promotes safety and reliability during electrical testing procedures. This step is vital to prevent false readings that could lead to misunderstandings about the circuit's condition, potentially causing unsafe working conditions.