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British Standards Bs 7671 Electrical Installation Exam Practice quiz 12 100

British Standards Bs 7671 Electrical Installation Exam Practice quiz 12 100

British Standards Bs 7671 Electrical Installation Exam Practice

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Quiz Questions And Answers

Requirements are included in BS 7671 for electrical installations of

Lift installations
Mobile offshore electrical systems
Distributor's networks
Locations containing a bath or shower

Which of the following is excluded from the scope of BS 7671?

Cabins containing sauna heaters
Fountains
Highway power supplies
Lightning protection

Which of the following is not included in BS 7671?

Demolition site installations
Electric fences
Medical locations
Motor caravans

Which of the following documents is non-statutory?

Electricity Safety, Quality and Continuity Regulations
Electricity at Work Regulations
The Building Regulations
Requirements for Electrical Installations

Protective equipotential bonding is achieved by

Preventing current from passing through the body
Ensuring adequate continuity between extraneous conductive parts
Automatic disconnection of supply in the event of a fault
Separation of equipment from the supply using a safety isolating transformer

The type of earthing arrangements requiring a consumer's earth electrode to be installed is where

No earth facility is supplied by the distributor
The supply is from a low voltage generator
Earthing is via the distributorā€™s cable armour

Low-voltage is defined in BS 7671 as having a value exceeding

24V ac
48V ac
50V ac
120V ac

Tables showing the classification of external influences when considering environmental conditions during the design of an installation can be found in BS 7671

Chapter 32
Chapter 53
Appendix 4
Appendix 5

An assessment must be made of harmful effects on other electrical systems when installing

Large electric motors
Fire alarm systems
Emergency lighting circuits

For a 32A ring final circuit in similar premises to a dwelling, the minimum size of thermoplastic insulated copper live conductors allowed is

1.0mm2
1.5mm2
2.5mm2
4.0mm2
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