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How this is calculated#

The tool looks up the periodic assessment interval for a site type. It reads Electricity (Safety) Regulations 2010 reg 75 and points at the standard that reg 75 names.

1. Installation. You pick the site type, such as a caravan park. The tool finds its entry in reg 75(1)(a).
2. Standard named. It gives the standard that the entry names for the assessment.
3. Interval. It gives the maximum interval that reg 75(1) states for a low voltage installation.
4. Record. It gives how long the record of assessment is kept, from reg 75(4)(d).
5. Fire alarm. For a fire alarm system, it adds the NZS 4512 intervals.

Worked example#

• Caravan park. The tool names AS/NZS 3001.1. The maximum interval is 5 years. The record is kept for 3 years.

Limits#

The tool points at the regulation. It gives no ruling on a site or a system. Reg 75(2) and reg 75(3) cover who carries out the assessment. Reg 75(8) covers how the intervals sit against the standard. The tool holds none of that detail. It read the regulations as at 15 January 2026. Check for a later version.

Use the result to plan the next assessment. The tool gives the maximum interval the regulation states. A shorter interval can apply to your site, because the owner or an insurer can ask for one. The record of assessment is a separate document. Keep it for the period the tool gives. The tool applies to New Zealand only. It has no Australian interval.

See also: Regulatory pathway, Regulations 57 and 59 explained and Who may do electrical work in NZ.