Test house audits

Test houses calibrate, install, commission and certify electricity metering installations.

About test houses

Approved test houses are responsible for:

  • installing, testing and certifying metering installations
  • ensuring that the standards of metering calibration, testing, installation  and maintenance detailed in the Code are carried out accurately.

There are the two types of approved test houses, class A and B. Each category performs different work and has different audit requirements.

1. Class A test houses

Class A test houses are approved to:

  • calibrate working standards, metering equipment and metering installations
  • install metering equipment
  • commission and certify all categories of metering installations
  • issue calibration and certification reports for all metering categories.

2. Class B test houses

Class B test houses are approved to:

  • calibrate class 1 and class 2 meters and class 0.5 current transformers
  • install metering equipment
  • commission and certify category 1-3 metering installations.

When a test house is audited

Audits should be carried out and submitted:

  • when a test house first gains approval
  • on the date that we advise that an audit should take place
  • at any time at the request of the industry participant, the market administrator (Electricity Authority) or an auditor.

What the test house audit covers

The audit shows if a test house:

  • has the facilities and procedures to consistently meet the requirements of the Code
  • has a fit and proper person for approval to act as an approved test house
  • addresses any other matters raised.

Read the following guidelines and inherent risk register.

Register of approved test houses and next audit dates

We keep a register of approved organisations that can carry out the functions of an approved test house. The register includes the due dates for their next audits.

Audit reports and compliance plans

We publish all approved test house audit and compliance reports.