EPC 37 - Switchboard Connections From Sub-circuits

Question 1

Is it necessary to mark the electrical components on a switchboard to indicate their relationship to each other? (Give the Wiring Rules Clause Number).

Answer 1

Yes.

AS/NZS 3000 Clauses 2.10.5.2.

Question 2

List FIVE electrical accessories that would be found on the switchboard of a typical single phase single domestic installation which had at least two lighting circuits and two power circuits.
(Give the Wiring Rules Clause Number).

Answer 2

Main switch, 
Circuit breakers, 
RCDs, 
Main neutral link, 
RCD neutral links.

Question 3

If two or more circuit breakers are mounted in the same row on a switchboard, is it necessary to orient the operating mechanism of each circuit breaker in the same direction? (Give the Wiring Rules Clause Number).

Answer 3

Yes.

AS/NZS 3000 Clause 2.10.3.4.1.

Question 4

What is the maximum permissible mounting height for a main switch above the ground, floor or platform?
(Give the Wiring Rules Clause Number).

Answer 4

2m.

AS/NZS 3000 Clause 2.3.3.4(a).

Question 5

How can all protective earthing conductors be joined together if an earth link is not provided at the main switchboard? (Give the Wiring Rules Clause Number).

Answer 5

By twisting together and soft soldering.

AS/NZS 3000 Clause 5.3.4 and 3.7.2.11.