Capstone Revision 4

The cable that connects the main earth busbar to the earth electrode is called “___________ earthing conductor”

• Protective

• Main

• Copper

• MEN

The MEN system keeps the phase voltages all at a locked value with reference to the ______? of earth

• moistness

• point

• equipotential

• mass

Conductors (or conductive material) that can get a voltage on them accidently are connected to the earth bar by a ____________? bonding conductor.

• equipotential

• earth

• linked

• copper

__________? testing is completed to ensure that there is no shock hazard arising from any incorrect connections.

• Insulation

• Resistance

• Polarity

• Continuity

Protective earthing must enable _____________? disconnection of the supply in the event of a short-circuit to earth fault.

• quick

• immediate

• fused

• automatic

Unlike a protective earthing conductor, a ___________? earth may have current flowing in it to do its normal job.

• functional

• protective

• main

• bonding

One of the tests that should be carried out on the earthing system is earth _______?

• polarity

• protection

• insulation

• continuity

A MCB typically used for the protection of a motor circuit is what type?

• A type

• B type

• C type

• D type

The minimum equipotential conductor size for bathrooms, swimming pools and spa pools is ?

• 2.5mm

• 4.0mm

• 6.0mm

• 10.0mm

A RCD (residual current device) detects earth leakage by measuring the imbalance of current between what two conductors?

• Phase and Earth

• Neutral and earth

• Phase and Neutral