Oral Questions - Set 1 Flashcards

Questions associated with AS/NZS 3000

1
Q

Apart from the hot water system what other equipment should have an equipotential bond

A

Any metallic surface that may come into contact with an exposed live part or conductor.

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2
Q

If the consumer mains are not protected what is the minimum size of the MEN link.

A

The same size as the main neutral. AS/NZS 3000:2018, Clause 5.3.5.2

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3
Q

Show and name the parts of the earthing system associated with your installation.

A
  1. Earth electrode,
  2. Main earthing conductor,
  3. Main earthing terminal/bar,
  4. MEN link,
  5. Protective earthing conductors,
  6. Equipotential bonding
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4
Q

What is the maximum distance above the ground, floor or platform you can install a main switch.

A

2 meters

AS/NZS 3000:2018, Clause 2.3.3.4

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5
Q

Can you isolate or switch an earthing conductor?

A

No

AS/NZS 3000:2018, Clause 2.3.2.1.2(c)

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6
Q

Do circuit neutrals have to be identified at a switchboard?

A

Yes AS/NZS 3000:2018, Clause 2.10.5.4

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7
Q

Can a 2.5mm2 neutral conductor be connected directly to the load side terminal of an RCD?

A

Yes, if it’s the only neutral conductor in the RCD

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8
Q

What is the minimum size underground single-phase domestic consumer’s mains cable that can be connected in Western Australia?

A

10mm2 - WAER 9.2.1

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9
Q

What is an MEN link?

A

A link between the main earth conductor and the main neutral conductor.

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10
Q

In a domestic installation, do all circuit protection devices on a switchboard have to actuate in the same direction?

A

Yes.

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11
Q

How would you join the protective earth conductors if an earth link were not provided on a switchboard?

A

By other approved means, eg soldering, double screw connectors.

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12
Q

What is the minimum size underground three-phase domestic consumer’s mains cable that can be connected in Western Australia?

A

6mm2 - WAER 9.2.1

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