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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
A TT system, shown in the image below, has the neutral of the source of energy connected as for TN-S, but no facility is provided by the distributor for the consumers earthing. With TT, the consumer must provide their own connection to earth, i.e. by installing a suitable earth electrode or ground spike local to the installation.
