Revision for G104A part 1

In general with reference to AS3000, which of the following is an acceptable colour for active conductors? Table 3.4

• Green

• Yellow

• Black

• white

Which of the mandatory tests detailed in AS3000 prevents electric shock hazards from inadvertent contact? 8.3.10

• verification of RCD

• correct circuit connections

• fault-loop

  impedance

• insulation resistance

Circuits supplying appliances with sheathed heating elements can have a minimum insulation resistance of not less than: 8.3.6.2(i)

• 1kΩ

• 10kΩ

• 0.2kΩ

• 10MΩ

Which of the following circuits does NOT require RCD protection in a domestic installation?

• socket outlets

• lighting

  circuits

• directly connected hand held electrical equipment

• Sub main

Can a low voltage and extra low voltage wiring system be enclosed in a common enclosure? 3.9.8.3(c)

• Yes, providing the cables are

  installed in a separate compartment of a common cable trunking system

• No

• Yes, providing a distance of 300mm exists

• Yes, providing the wiring system of the lower value consists of triple insulation

The termination of fixed wiring at a socket outlet or lamp holder is: 1.4.72

• a point

• point of entry

• fixed wiring

• open wiring

Socket outlets must be connected so that: 4.4.5

• the neutral and earth conductors may be connected together in the multiple earthed neutral system

• when viewed from the front, the order of connection is Earth, Active and Neutral in a clockwise direction

• when viewed from behind the order of connection is earth, Active and Neutral in a clockwise direction

• the

  Neutral and Earthed conductors are easily interchanged to suit requirements

  of the local supply authority

If the insulation resistance of a circuit supplying a water heater gives a reading of 50 kΩ: 8.3.6.2(i)

• the wiring should be renewed

• the circuit may be connected to the supply

• the circuit should be tested again with the element disconnected

• the element of the water heater should be replaced with an element that has an insulation resistance in excess of 1MΩ

The temperature of hot water produced in an instantaneous hot water system is dependent on

• The setting of a contact-type bi-metal thermostat, mounted on the outside of the vessel, monitoring the vessels temperature

• The rate of flow across the heating

  elements

• The

  setting of a stem type thermostat, enclosed by a sheath, located in the

  vessel, monitoring the water temperature

• The setting of an over-temperature cut-out

An example of Class II equipment would be: 1.4.28

• domestic

  range

• double insulated drill

• light

  in a pool fed from a SELV supply

• hot water system