ECS - Electrotechnical Certification Scheme Testing and Inspection Procedures Questions and Answers

Question 1

An electrician has correctly isolated a circuit, locked it off with a padlock and warning notice, and proved the circuit is dead using an approved voltage indicator.
According to the recommended safe isolation procedure, what is the final essential step before commencing work?

Accepted Answer

Re-check the voltage indicator against a known live source or proving unit.

Answer

Inform the site manager that the power is off.

Answer

Take a photograph of the locked-off device for records.

Answer

Measure the resistance of the conductors to be worked on.

Question 2

During a periodic inspection (EICR) of an existing domestic installation, an inspector discovers that the main protective bonding conductor to the incoming gas service is missing entirely. How should this observation be coded?

Accepted Answer

C2 - Potentially Dangerous

Answer

C3 - Improvement Recommended

Answer

C1 - Danger Present

Answer

FI - Further Investigation Required

Question 3

When carrying out the initial verification of a newly installed ring final circuit, which of the following 'dead' tests must be performed first according to the sequence in BS 7671?

Accepted Answer

Continuity of protective conductors

Answer

Insulation Resistance

Answer

Polarity

Answer

Continuity of ring final circuit conductors

Question 4

According to BS 7671, what is the minimum acceptable insulation resistance value for a standard 230V final circuit when tested using a 500V DC test voltage?

Accepted Answer

1.0 MΩ

Answer

0.5 MΩ

Answer

2.0 MΩ

Answer

5.0 MΩ

Question 5

Which of the following is a key safety requirement for test leads used for voltage measurement on low voltage systems, as detailed in the HSE's Guidance Note GS38?

Accepted Answer

Probes must have fused leads or internal fuses.

Answer

Leads must have a minimum length of 2 metres for accessibility.

Answer

Connectors must be unshrouded 4mm plugs for universal compatibility.

Answer

The insulation must be coloured red and black only.

Question 6

An electrician replaces a single damaged socket outlet on an existing circuit with a like-for-like equivalent. No new wiring is installed. Which certificate should be completed for this work?

Accepted Answer

Minor Electrical Installation Works Certificate (MEIWC)

Answer

Electrical Installation Certificate (EIC)

Answer

Electrical Installation Condition Report (EICR)

Answer

Schedule of Test Results