Circuit Testers | McMaster-Carr

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202 Products

Measuring and Inspecting

Electrical Outlet Testers

Electrical Outlet Testers

Confirm proper wiring by checking for open circuits

Voltage Detectors

Voltage Detectors

Check for voltage in receptacles, cables, and other electrical components

Circuit Tracers

Circuit Tracers

Locate cables behind walls, check for continuity, and identify circuit breakers

Line Break Detectors

Line Break Detectors

Check for continuity in circuits

Current Detectors

Current Detectors

Check for AC current and voltage without making direct contact with wire

Multimeters

Take current, voltage, resistance, and other electrical measurements

Test Leads

Pair with electrical testers such as multimeters to analyze your devices

Circuit Breaker Identifiers

Circuit Breaker Identifiers

Determine which circuit breaker is connected to an electrical receptacle

Electronic-Component Testers

Electronic-Component Testers

Test, identify, and troubleshoot components such as circuit boards and diodes

Data Cable Identifiers

Data Cable Identifiers

Trace unshielded data and telephone cables to their source

Electrical

Electrical Cord Circuit Interrupter Converters

Electrical Cord Circuit Interrupter Converters

Hardwire to extension cords to protect against electric shock in wet areas

Binding Posts

Test circuits before making permanent connections

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)