Testing and Inspection

What is Inspection and Testing?

Electrical Inspection and Testing is a procedure completed by qualified electricians that complies with HASAWA 1974 ,EAWR 1989 and BS7671.

Inspection and testing on completion of a new installation

Within BS 7671, Regulation 610.1 states that "every installation shall, during erection and on completion before being put into service be inspected and tested to verify , so far as reasonably practicable, that the requirements of the regulations have been met."

To comply with this regulation, qualified electricians must complete a full inspection and testing procedure. In a case of a new electrical installation, the procedure is followed by the completion of the Electrical Installation Certificate. In a case of an alteration of an existing electrical installation, a Minor Electrical Work Certificate is to be completed.

Periodic inspection and testing

Regulation 621.1 states that "where required, periodic inspection and testing of every electrical installation shall be carried out in accordance with regulations 621.2 to 621.5 in order to determine as far as reasonably practicable, whether the installation is in a satisfactory condition for continued service".

This regulation relates to electrical installations which are not newly built or altered. In this case a periodic inspection is to be carried out. Together with visual inspection it consists of a full inspection and testing procedure and is followed by the completion of the Electrical Installation Condition Report (EICR).

These certificates are documents which must be kept by both the "person ordering the work" (i.e.: owner) and the "competent person"(qualified electrician) completing the inspection and testing procedure.

In both cases the sequence of tests to be carried are the same.

Sequence of tests

During both initial verification and periodic inspection, each circuit must be tested. It is very important that the sequence of tests is carried out in a correct order.
The sequence of tests:

  • - Continuity of protective conductors, including main and supplementary bonding
  • - Continuity of ring final circuit conductors
  • - Insulation resistance testing
  • - Polarity testing
  • - Earth fault loop impedance testing
  • - Prospective fault current testing
  • - RCD testing
  • - Phase sequence testing
  • - Functional testing

Nomico can arrange a rolling programme of testing to spread the cost of this important work over the 5-year period. When combined with emergency light testing and routine maintenance (such as changing fluorescent tubes and light bulbs) a cost-effective schedule can be produced.

Electrical Testing