6035 | Electrical Principles LO3

The safe isolation for an immersion heater is done at:

• The plug socket

• The consumer unit

• The fused spur

• The electrical meter

The image shown here is:

• Multimeter

• Proving unit

• RCD

• Voltage tester

The GS38 is:

• A guidance document produced by the Health & Safety Executive dealing with electrical test equipment.

• The national standard used for electrical installation and wiring safety across domestic, commercial, and industrial properties.

• that anyone carrying out electrical installation work in a home must make sure that the work is designed and installed to protect people from fire and electric shocks.

The maximum length that the test probe can be is:

• 2mm

• 3mm

• 4mm

• 5mm

Place the safe isolation in the correct order.

1.) Test the voltage indicator on a known source.

2.) Go back to appliance and prove appliance is dead

3.) Make sure it is ok to disconnect the supply

4.) Identify the source for the supply.

5.) Re-test the voltage indicator on a known source.

6.) Switch off MCB, lock and label, or remove fuse, lock and label.

• 3, 4, 1, 2, 5, 6

• 4, 1, 3, 6, 2, 5

• 1, 3, 6, 4, 2, 5

• 3, 1, 4, 6, 2, 5

Which of the following combinations do not need to be tested during safe isolation procedure?

• Live to Neutral

• Live to CPC

• Neutral to CPC

• CPC to Earth

During safe isolation, you must test your voltage indicator is working by using a known source. What is that known source?

• An MCB

• A proving unit

• The earth terminal

• A plug socket

Which of the following is not a correct location for isolating safely?

• At consumer unit

• At appliance switch

• At fused spur

• At switched fused spur