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Socket tester also checks earth-loop impedance
Published: April 2008
Martindale’s E-ZE 150 electrical socket tester gives an accurate indication of earth-loop impedance — as well as wiring faults such as a reversed phase and neutral, reversed phase and earth, open earth etc. These testers are shaped like a plug top and cost less than £50. They enable the earth in an electrical installation to be pretested by an apprentice. They can also be used to check if damage has occurred to an earth circuit — without tripping RCDs. The impedance of the earth loop is indicated in bands of 0, 1.7, 5, 10, 100, 200 and 500 Ω. For more information on this story, click here: April 08, 165 Related articles: 
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