Oral Questions - Set 1 Flashcards
Questions associated with AS/NZS 3000
Apart from the hot water system what other equipment should have an equipotential bond
Any metallic surface that may come into contact with an exposed live part or conductor.
If the consumer mains are not protected what is the minimum size of the MEN link.
The same size as the main neutral. AS/NZS 3000:2018, Clause 5.3.5.2
Show and name the parts of the earthing system associated with your installation.
- Earth electrode,
- Main earthing conductor,
- Main earthing terminal/bar,
- MEN link,
- Protective earthing conductors,
- Equipotential bonding
What is the maximum distance above the ground, floor or platform you can install a main switch.
2 meters
AS/NZS 3000:2018, Clause 2.3.3.4
Can you isolate or switch an earthing conductor?
No
AS/NZS 3000:2018, Clause 2.3.2.1.2(c)
Do circuit neutrals have to be identified at a switchboard?
Yes AS/NZS 3000:2018, Clause 2.10.5.4
Can a 2.5mm2 neutral conductor be connected directly to the load side terminal of an RCD?
Yes, if it’s the only neutral conductor in the RCD
What is the minimum size underground single-phase domestic consumer’s mains cable that can be connected in Western Australia?
10mm2 - WAER 9.2.1
What is an MEN link?
A link between the main earth conductor and the main neutral conductor.
In a domestic installation, do all circuit protection devices on a switchboard have to actuate in the same direction?
Yes.
How would you join the protective earth conductors if an earth link were not provided on a switchboard?
By other approved means, eg soldering, double screw connectors.
What is the minimum size underground three-phase domestic consumer’s mains cable that can be connected in Western Australia?
6mm2 - WAER 9.2.1