The requirement for full inspection and testing has not changed, this should be carried out safely and by a skilled person. However, some details have changed and need to fully understood by the inspector.
What it means
Changes have been introduced such as: Inspection and testing Table 71A is now known as table 61.
Minimum installation values changed to:
- 0.5 MΩ Selv or Pelv at 250 volts
- 1.0 MΩ for systems up to and including 500 volts with a test voltage of 500 volts.
- For systems above 500 volts tested at 1000 volts the minimum is also 1.0 MΩ
Only a skilled person competent in such work should be used to conduct the inspection and testing. Proof of competence should be shown.