Earthing Arrangements Flashcard

Front

What is the primary purpose of earthing in an electrical installation?

Back

To prevent electric shock

Front

Which regulation document provides guidance on earthing arrangements in the UK?

Back

BS 7671

Front

What does the term 'TN-S' indicate in earthing systems?

Back

The neutral and earth are separate throughout

Front

In a TT system, the earth connection is typically made via: The supplier's neutral conductor, An earth rod, A metallic water pipe, A shared earth bar

Back

An earth rod

Front

Which earthing system is commonly used in rural areas?

Back

TT

Front

TN-C-S

Back

Protective Earth and Neutral Combined in Supply

Front

In a TN-C-S system, the PEN conductor stands for:

Back

Protective Earth and Neutral

Front

Risk associated with a TN-C-S system?

Back

Earth potential rise

Front

The main earthing terminal (MET) in an installation is used to:

Back

Connect all protective conductors to earth

Front

What is the primary function of an earth electrode?

Back

To discharge fault currents safely to the ground