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Latest AS/NZS 5033:2014 revision

CEC solar members and installers are advised that the revised version of AS/NZS 5033 comes into effect from tomorrow, 6 February 2015.



Latest AS/NZS 5033:2014 revision effective from tomorrow

CEC solar members and installers are advised that the revised version of AS/NZS 5033 comes into effect from tomorrow, 6 February 2015.
This updated standard was released in November 2014 following consultation with the CEC and its members and installers.
CEC technical staff have prepared this advice to help accredited people understand the changes in the updated standards. These changes are also outlined in the installer area of the Solar Accreditation website and the member area of the Clean Energy Council website.
A copy of the standard can be purchased from SAI Global (click here) or by calling 131 242.
The high level changes are:

  • Change in scope with respect to the power limit
  • Inclusion of DC conditioning units applied at a module level
  • Revision of small micro inverter requirements
  • Requirements for PV cables, cable protection and conduit, connector requirements
  • New signs and commissioning requirement

Below is a summary of some of the more specific changes in this standard. This does not cover all the changes and installers should purchase the latest standard for all the details.

  • The term 'adjacent' is now defined (clause 1.4.1)
  • The term 'domestic dwelling' is now defined (clause 1.4.14)
  • Clearer definition of 'restricted access' is provided (clause 1.4.61)
  • The requirements for arrays using maximisers/optimisers/DC conditioning units has been defined (clause 2.1.5)
  • Defining PV array maximum voltage for DC conditioning units as equal to the PCE maximum voltage
    • For example if the system contains DC conditioning units, the output circuit of these units shall be considered to be the PV string because it is the output voltages of the DC-to-DC conditioners that are added to produce the string voltage and under these conditions the inverter maximum voltage shall be used as the PV array maximum voltage.
    • In some cases the sum of all the open circuit voltage of all the modules in this configuration may be much greater but the DC to DC conversion units reduce their output voltage and match it to the inverter requirements, so it is the inverter max input voltage that is most relevant (clause 2.1.5)
  • Ensuring Voc of each parallel string is within 5 per cent of each other (clause 2.1.6)
  • Allowance of arrays with maximisers/optimisers/DC conditioning units to be oriented differently (clause 2.1.6)
  • The requirement of array framing to be anodised when in a marine environment has been removed (clause 2.2.7)
  • Better definition for maximum voltage of domestic installation and restricted access requirements (clause 3.1)
  • Clearer definition of when HD conduit is required
    • Allowance for some of the DC cable to be not in conduit (for connection to the inverter).
    • Allowance for using methods other than HD when installed in non-domestic situations (clause
  • Clearer definition of micro inverters
    • Allowance to have multiple (2) micro inverters in one package (clause 4.3.12)
  • Allowance for adaptor leads when using micro inverters to enable like for like plug connection (clause 4.3.12)
  • Clearer definition of when isolators are required when there are multiple strings (clause and
  • Defining earthing requirements for micro inverters (clause and
  • Allowance to connect the PV module frame earth to the inverter AC output earth conductor under specific situations as outlined in clause (i-iv)
  • Change the labelling of conduit to every 2 metres (clause 5.3.1)
  • Much clearer definition of what is required on the fire emergency sign in relation to short circuit current and open circuit voltage when you have multiple arrays and DC conditioning units (clause 5.4.1)
  • Defined fire emergency information sign for micro inverters (clause 5.4.1)
  • Clearer definition of the shutdown procedure sign requirements (clause 5.5.3)
For more information you can purchase the revised standard from the SAI Global online store, contact Standards Australia or get in touch with the CEC accreditation team




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