Socket Tester Classic

Code: MARCP501

Location Stock
Cork In Stock
Tallaght In Stock
Dungannon Out of stock.

Martindale MARCP501

Socket Tester


Product Overview

With over 2 million of these socket testers sold, the Martindale CP501 is the most popular socket tester available. The classic check plug is a quick and easy way to ensure that 13A sockets are correctly wired, indicated by 3 bright long life LEDs.

Wiring faults are indicated by one or more of the LEDs failing to illuminate, with the pattern of lit LEDs indicating the type of fault detected. 

This fail-safe system means that any LED not lit indicates a fault. The robust ABS housing has a sculpted shape for easy removal and there is a look up chart on the tester for quick fault diagnosis.

The plug induces less than 5mA of earth leakage, well below RCD trip thresholds.

Detects 28 fault conditions


Product Specs

Mains Supply
  • 200 - 250V (30-70Hz)

Power Consumption

  • <1.2W

Temperature Range

  • -10°C to 40°C, 60% RH (max)

Earth Leakage

  • <5mA


  • CAT II, 300V


  • Flame retardant ABS


  • 65 x 65 x 47mm

Please click the links below to download the application notes in pdf format.

Socket testing safety

Socket Testers Best Practice Guide 8



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