esv.vic.gov.au
Question Answer Standard/Clause
Do I need an RCD for a lift installed
in a common area of a residential
building? Not necessarily. AS/NZS 3000:2018
RCDs will be required where the lift is installed inside
an individual occupier’s portion (domestic or residential). Clause 2.6.3.2.2
RCDs may not be required for common areas of a residential
building, as this area is not considered to be domestic or residential
for the purpose of clause 2.6.3.2.2 — RCDs in domestic and
residential installations.
Do I need an RCD on all the
subcircuits in the plant room
circuits supplying equipment listed
in 2.6.3.2.3.3 of a residential building?
Not necessarily. AS/NZS 3000:2018
RCDs may not be required for final subcircuits in the plant
room of a residential building, as this area is not considered
to be domestic or residential for the purpose of clause
2.6.3.2.2 — RCDs in domestic and residential installations. Clause 2.6.3.2.3.1
However, RCDs will be required where the final subcircuit
supplies electrical equipment associated with any portion
of a domestic or residential living unit.
Can I put an LV main switchboard
in a HV substation room?
Yes. However, you must be aware of any access requirements. AS/NZS 3000:2018
Private HV substations typically require an electrical access
permit (EAP) to be issued before anyone can access the substation.
This means an EAP will be required to access the room impeding
access to the LV MSB. Clause 2.10.2.1
No. A cupboard is not deemed to be an enclosure
or a switchboard room. AS/NZS 3000:2018
If an installation includes a circuit
that has cables sized for voltage drop
reasons and therfore significantly
larger than required for the installed
protective device, does the earth
size need to meet Table 5.1 for the
larger cable or can it be reduced to
that required for the equivalent sized
cable related to the current carrying
capacity? For main earthing conductor size — Clause 5.3.3.2,
Exception 2 may be applicable. AS/NZS 3000:2018
Can I put baton holders in ceiling
spaces, or under floors? No. If it has direct contact with live parts of a lampholder
when the lamp is removed. AS/NZS 3000:2018
Do I need to mechanically protect DC
wiring system in a internal wall with
less that 50mm clearance from the
surface of a wall, floor, ceiling or roof. Yes. Mechanical protection must meet a minimum of WSX3. AS/NZS 3000:2018
Guidance on WS classification can be found in Appendix H
of AS/NZS 3000:2018. Clause 3.9.4.2
Does a door to a switchboard
installed in a passage need to
be 2.2m high?
AS/NZS 2067
The Blue Book
Clause 2.10.2.2(iv)
The building code only requires
passageways to be 2.1m high, so
potentially this stops us installing
switchboards in passageway
cupboards.
All other earthing conductor sizing will relate to the larger
conductor size and you will need to comply with Table 5.1
or calculation as per Clause 5.3.3.1.3.
Clause 5.3.3.1.2 (a)
Note 2
Clause 4.5.1.1
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