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For all the latest energy safety news visit www.esv.vic.gov.au
May 2014
energysafe issue 35
Installation of DC cables
Can I install DC sub-array cable within a roof
space of a building where the arrays are
located on different sections of the roof?
Yes, DC cables must be installed compliant with section 3 of AS/NZS 3000:2007 Selection
and Installation of Wiring Systems.
When installing solar roof tiles, can I install
the isolating switch on the fascia board?
Yes, where DC cables are installed within a structure (such as a roof space) and are not
controlled by an isolating device, the protection method of Cause 3.9.4.4 (a) & (b) of
AS/NZS 3000:2007 must be used.
To minimise the risks of DC arcs occurring between conductors, double insulation between positive
and negative conductors shall be maintained within heavy duty (HD) enclosures where installed within
a structure. In locations where it can reasonably be expected that cables are subject to mechanical
damage, the protection method of AS/NZS 3000:2007 Clause 3.9.4.4 (a) & (b) must be used,
eg. cables installed in an accessible roof space or cable enclosed in walls.
Solar boosted equipment
Is the DC supply from the solar panels for
The DC supply from the solar array can be