Electrical Safety Principles and Precautions

What is the purpose of the 17th Edition Wiring Regulations (BS 7671)?

To set the minimum standards for electrical installations in the UK

To provide guidelines for plumbing installations

To outline safety procedures for gas appliances

To regulate telecommunications infrastructure

Which of the following is a recommended precaution when working with electrical circuits?

Always work alone to avoid distractions

Wear rubber-soled shoes and insulated gloves

Use metal tools to ensure durability

Work in a damp environment to minimise static

What should you do before working on any electrical equipment outdoors?

Check the weather forecast

Disconnect the equipment from the power source

Wash your hands thoroughly

Take a photo of the equipment for reference

What colour is the protective earth (ground) wire in the UK?

Red

Blue

Green and yellow

Black

Which device is used to protect against electric shock by breaking the circuit when it detects an imbalance between live an neutral wires?

Circuit breaker

Fuse

Residual Current Device (RCD)

Transformer

What is the maximum permissable voltage for low voltage systems in the UK?

50V

230V

400V

1000V

What is the first step to take if someone receives an electric shock?

Call an electrician

Turn off the power supply

Move the person away from the source

Administer CPR immediately

What type of fire extinguisher should be used for electrical fires?

Water

Foam

Carbon Dioxide (CO2)

Dry powder

Which organisation is responsible for setting electrical safety standards in the UK?

British Standards Institution (BSI)

Health and Safety Executive (HSE)

National Grid

UK Power Networks

What is a common indication that an electrical device is unsafe to use?

The device is warm to the touch

The device emits a burning smell

The device makes a low humming noise

The device is made of plastic

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Electrical Safety Principles and Precautions