Earthing system

An electrical intake system which uses an earth rod would be classed as

• TT

• TN-S

• TN-C-S

• PME

Which of the following earthing systems has the path for earth leakage currents via the general mass of earth

• TN-S

• TNC-S

• TN-C

• TT

Factors on which soil resistance depends

• Salt Concentration

• Depth of electrode

• Moisture

• All of the above

What is an earth electrode?

• electrode that is connected to earth

• material used for earthing

• electrode connected to the circuit

• electrode which is connected to the mains

An electrical intake system whereby the main earth conductor is connected to the sheath of the incoming supply cable is known as

• TT

• TN-S

• TN-C-S

• NC-S

An electrical intake system which uses an earth rod would be classed as

• TT

• TN-S

• TN-C-S

• PME

The earthing system whereby the neutral combines the function of both neutral and earth is termed

• TN-S

• TT-S

• TN-C-S

• NE-S

The permanent inscribed notice on an earth bonding clip must read

• safety electrical connection

• safety electrical connection, do not remove

• do not remove

• safety electrical connection, replace after removal

Which one of the following supply systems would have three live conductors and a neutral?

• 4 phase

• 3 phase

• 2 phase

• Single phase

All electrical testing equipment should comply with which document

• GS 38

• The Electricity at work Regulations

• BS 7671

• Part P