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WorksheetsQuiz 2: Earthing Network System
Total questions: 10
Worksheet time: 20mins
Please choose the correct earthing system.
TN-C
IT
TN-S
TT
Earthing is used to protect you from an electric shock. It does this by providing a path (a protective conductor) for a fault current to flow to earth. It also causes the protective device (either a circuit-breaker or fuse) to switch off the electric current to the circuit that has the fault.
TRUE
FALSE
Please choose the correct earthing system
TT
TN-C
TN-C-S
IT
Why there is no effect of electric shock occurs on the bird?
Bird standing on neutral line
Both of the bird’s feet touch the same line
Both of the bird's feet is high resistance
One of the bird's feet is not touch the line
Please choose the correct earthing system
TN-S
TT
IT
TN-C
Please choose the correct earthing system
TN-C
TT
IT
TN-S
Please choose the correct earthing system.
TN-C-S
TN-S
TN-C
IT
International standard IEC 60364 distinguishes three families of earthing arrangements, using the two-letter codes TN, TT, and IT. The first letter indicates the connection between earth and the power-supply equipment (generator or transformer)
FALSE
TRUE
Please choose the correct earthing system.
TN-S
TN-C-S
TT
IT
Please choose the correct earthing system.
TT
IT
TN-C
TN-C-S
