Work carried out without the competence or legal authorisation required for that work

Use with incompatible or unstable power sources, unsuitable inverter output or DC supplies, or incorrect voltage, polarity or frequency

Damage caused by unsuitable or unsafe modifications to wiring, terminals or internal components

Failure to provide the electrical protection required for the installation, which may include RCDs, MCBs, fuses or DC-rated protection as applicable

Lack of proper earthing for AC systems, or isolation/protection for ELV systems

Use outside the product’s rated electrical specifications

Electrical work that legally requires an authorised electrical worker must be carried out by a person authorised for that work, whether grid-connected or off-grid. Obtain the testing and certification required for the actual work.

Ordinary connection of a product designed to plug into a suitable existing socket is different from electrical installation work. Follow the instructions and consult an authorised electrical worker if wiring, alterations, protection, earthing or supply compatibility need assessment.

For extra-low-voltage equipment, follow the model’s installation, polarity, wiring and protection requirements. Use a suitably competent person and any legally required authorised tradesperson for the work involved; an extra-low-voltage label does not itself determine what work may safely or legally be done.

Products must be installed and operated in accordance with applicable New Zealand electrical safety standards, including AS/NZS 3000 and AS/NZS 3820 where relevant

The power supply must be electrically compatible with the product

The system must be installed and maintained in compliance with applicable New Zealand standards

Damage caused by an unsuitable or unstable supply may fall outside voluntary cover. Contact WCTNZ® about a fault so the cause, any product or advice issue, and the available warranty or statutory remedy can be assessed.