Electrical Safety and Isolation Practices

The video tutorial explains the concept of safe isolation in electrical circuits, emphasizing its importance in preventing electric shocks. It covers the basics of electrical supply, the dangers of reverse polarity, and the necessity of using double pole switches. The tutorial provides a detailed procedure for performing safe isolation, including testing and verification methods to ensure safety. It highlights the need for proper equipment and adherence to established procedures to avoid accidents.

What is the primary purpose of safe isolation in electrical work?

• To prevent electric shocks

• To reduce electricity bills

• To increase voltage

• To save energy

What are the typical voltage levels for live and neutral in a standard supply transformer?

• 230 volts for both live and neutral

• 115 volts for live, 115 volts for neutral

• 0 volts for live, 230 volts for neutral

• 230 volts for live, 0 volts for neutral

What is reverse polarity in electrical installations?

• When voltage is doubled

• When earth wire is disconnected

• When live and neutral wires are correctly connected

• When live and neutral wires are swapped

Why is it important to use a double pole main switch in domestic properties?

• To save space

• To switch off both live and neutral

• To reduce noise

• To increase current flow

What should you do before starting any work on an electrical circuit?

• Disconnect the earth wire

• Seek permission from the customer

• Turn on all appliances

• Increase the voltage

What is the first step in performing a safe isolation test?

• Call an electrician

• Turn on the circuit

• Prove the test equipment is functioning

• Check the weather

In a single-phase system, which combination should be tested first for safe isolation?

• Earth to earth

• Live to neutral

• Neutral to earth

• Live to earth

What should be the voltage reading between neutral and earth in a properly isolated circuit?

• 230 volts

• 115 volts

• 0 volts

• 50 volts

What is a key reminder when working with electricity?

• Electricity is unlimited

• Electricity is cheap

• Electricity is dangerous

• Electricity is safe

What should you do if you are unsure about the safety of an electrical circuit?

• Proceed with caution

• Ignore the issue

• Stop and ask for help

• Increase the voltage