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Appliances Can Kill... Safety First!
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Electrical Terminology
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Number Prefixes
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Ohms Law
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An overview of our safe working practices
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What is Earth Loop Testing
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TN-S Earth System
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TN-C-S System
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TT System
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Testing a TN-S Earth System
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Testing a TN-C-S System
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Testing a TT System
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How to perform an earth loop test from a hard wired appliance
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What is Earth Continuity
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Earth Continuity Test Sequence
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What is Insulation Resistance?
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Insulation Resistance Test Sequence
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How to test Earth Continuity and Insulation resistance on a freestanding appliance.
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How to test Earth Continuity and Insulation resistance on a hard wired appliance.
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Safe Isolation
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Water Regulations
Quizzes
This test should be carried out on all appliances before and after a repair. The purpose of the test is to check that there is a good connection between the Earth pin on the plug and user-accessible conductive parts of the appliance. A good connection is defined as having a resistance of less than 0.3 Ohms.
The Earth Continuity test is sometimes referred to as the Earth Bond test or the Earth Resistance test. In effect, they all measure that there is a good connection between the mains plug and the Earth point.
