esv.vic.gov.au
Question
We are completing a multi-unit
development that started early
last year. RCDs were not specified
or allowed for, for the hot water
systems, air conditioning and
ovens and cook tops.
Are we still able to install the
remaining residential units
without RCDs on these circuits?
Answer Standard/Clause
No. You will need to comply with AS/NZS 3000:2018, which
requires that all final subcircuits in domestic and residential electrical
installations be protected by RCDs with a maximum rated residual
current of 30 mA. This includes circuit supplying electric hot water
systems, air conditioning units and ovens and cook tops. AS/NZS 3000:2018
2.6.3.2.2
Alternatively, you can apply to ESV for an exemption. You will need
to complete the application form and pay the applicable fee.
To be granted an exemption you will need to demonstrate that the
electrical work commenced before 26 June 2018, and provide
technical information detailing that the granting of an exemption will
not reduce the level of safety from physical injury, fire or electric shock.
For more on the exemption process refer to the information on our
website at www.esv.vic.gov.au/electrical-installations-exemptions
I have been asked to wire up
240 volt lights and a power outlet
in a food van. What standard do
I need to comply with?
The electrical requirements for wiring food vans are in the Australian
Standard AS/NZS 3001:2008 (Incorporating Amendment No. 1)
Electrical installations—Transportable structures and vehicles including
their site supplies.
AS/NZS 3000:2018
7.1.2
These requirements are in addition to the requirements of
AS/NZS 3000:2018, the Australian/New Zealand Wiring Rules.
Australian Standards can be purchased from SAI Global.
Do I need to install RCDs on all final
subcircuits at a domestic installation
when I install a battery system, if
the installation does not have RCDs
installed on the final subcircuits?
No. Clause 5.4.4 of 4777.1 states that RCDs on multiple mode
inverter system RCD protection shall be installed on final subcircuits
in accordance with AS/NZS 3000.
Therefore, due to the alteration of the installation by adding a
battery inverter, the final subcircuits need to be in accordance
with AS/NZS 3000.
AS/NZS 3000 clause 2.6.3.2.5 covers the RCD requirements for
alterations to installations. As you are not doing any alterations to
the final subcircuits, the installation falls under the requirements
outlined in (b).
AS/NZS 4777.1
5.4.4
AS/NZS 3000:2018
2.6.3.2.5 and
2.6.3.2.3.3
Therefore, as the alteration does not include the replacement of
all of the circuit protection in the switchboard, upgrading to RCDs
is not required.
Note: it is important to understand that when you are adding backup
systems to installations with existing RCDs already installed, you
are required to check whether the RCDs are the correct type for the
inverter you are using. Some modern battery inverters require Type A
RCDs, while many RCDs installed in Australia are Type AC and may
therefore not work correctly when in backup mode.
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