Revision Paper 4 BS 7671:2018 AM3

Which of the following types of installation is not included in the special installations recognised by BS 7671?

• Agricultural

• Petrol filling stations

• Saunas

• Swimming pools

Answer explanation

Contents

BS 7671 does not apply to

• fairgrounds

• marinas

• photovoltaic systems

• railway traction equipment

Answer explanation

110.1.1

Which one of the following parts of BS 7671 contains greater detail of the Assessment of General Characteristics?

• Part 1

• Part 2

• Part 3

• Part 4

Answer explanation

Contents

BS 7671 states that installation design must take into account

• a comparison of renewable energy sources

• anticipated electromagnetic emissions

• current copper prices

• the effects of climate change

Answer explanation

Page 21 132.11

Simple separation is separation between circuits by means of

• A basic insulation

• B double insulation

• C no insulation

• D reinforced insulation

Answer explanation

Definitions Part 2

Excessive current occurring in an electrically sound circuit is known as

• earth fault current

• fault current

• nuisance current

• overload current

Answer explanation

Definitions Part 2

Which one of the types of system earthing codes has the following description 'neutral and protective functions combined in a single conductor'

• C

• N

• S

• aT

Answer explanation

312.2, note 3

Which one of the following needs to be considered in order to identify the characteristics of equipment likely to have harmful effects on other electrical equipment?

• Classification of external influences

• Compatibility of characteristics

• Continuity of services

• Maintainability

Answer explanation

331.1

The compatibility of harmful effects upon electrical equipment would not need to be assessed for

• D.C feedback

• fault currents

• power factor

• undervoltages

Answer explanation

331.1

Which one of the following is a consideration of maintainability?

• The EMC regulations

• The division of the installation

• The effectiveness of the protective measures for safety

• The supplies for safety services and standby systems