What needs to be considered when figuring out the number and type of circuits in an electrical installation?
Installation purpose
Equipment rating
Inteded use of socket outlets
Inclusion of electrical heating
An electrical installation should be arranged into circuits to ensure...
Maintenance, alterations and additions can be done
Ease of fault finding
Limiting of overloading
The loss of supply to critical equipment is limited
A separate circuit shall be provided for all equipment that is more than 30A.
False
A separate circuit should be provided for all equipment that is greater than...
20 A
What circuit is most likely to be installed with multiple points installed on the same circuit?
Lighting circuit
Which type of equipment nuisance trips the most when connected to an RCD protected circuit?
Class I Equipment
What is maximum demand?
The continuous current needed for a circuit to operate reliably
Maximum demand is determined for Final Subcircuits by...
The connected equipment's actual current
Using a diversity determination
The protective device's size
What electrical equipment changes the seasonal demand?
Heating appliances
Clothes Dryers
Hot Water Systems
What electrical diagram is best used to help in wiring circuits and equipment, and shows components in the same layout?
Wiring Diagram
What electrical diagram is best used in fault finding and gives a logical sequence of circuit operation?
Circuit Diagram
What electrical diagram shows the arrangement of switching, protection and control of an installation?
Line Diagram
What electrical diagram shows basic functions of main components and how they interconnect?
Block Diagram
What extra low voltage system is designed so that the secondary is isolated from the low voltage
earthing system?
Separated Extra Low Voltage (SELV)
What extra low voltage system is designed so one side of the secondary supply is connected to the low voltage earthing system?
Protected Extra Low Voltage (PELV)
What is the voltage rating of Extra Low Voltage systems?
50 V a.c.
120 V d.c.
An extra low voltage system that doesn't meet the requirements of SELV or PELV has to be
treated as Low Voltage and meet installation requirements for low voltage
True
How does Electrical Separation provide protection from electric shock?
By making sure all exposed conductive parts AREN'T connected to Earth
Pool lighting, Pumps for water features, and Sanitization areas are all examples of ELV Installations
True
An a.c. shock is 3 to 5 times more dangerous to the human heart than a d.c. shock of the same voltage and current.
True
Electrical installations shall be arranged so that there's no risk of ignition of flammable materials due to...
High Temperature/s
Which AS 3000 section provides acceptable methods for protecting against hazards and risks in an electrical installation?
Section 2
According to Clause 6.2.4.4, to reduce the risk of electric shock a luminaire in Zone 0 of a swimming pool must be...
Supplied by a SELV or PELV source located outside zone 0
Designed specifically for use
Provided with the correct degree of protection
Supplied at a nominal voltage not exceeding 12 V a.c. or 30 V ripple free d.c.