Insulation Resistance Testing Procedures

The video tutorial covers the insulation resistance test, the third dead test according to BS 7671. It begins with an overview and preparation steps, ensuring all circuits are in the correct position and sensitive devices are removed. The tutorial then details the procedure for conducting the test, including testing between live conductors and to earth, and recording results. It concludes with finalizing the test, ensuring all steps are followed, and documenting the results.

What is the primary purpose of the insulation resistance test?

• To verify the operation of RCCBs

• To ensure the installation is live

• To measure the resistance between conductors and earth

• To check the continuity of protective conductors

Why is it important to leave all circuits in the 'on' position during the continuity test?

• To ensure RCCBs are operational

• To avoid unnecessary power consumption

• To prevent damage to electronic devices

• To ensure the insulation resistance test reaches the front of the plate

What should be done with electronic devices like RCCBs during the insulation resistance test?

• Leave them in the on position

• Increase their voltage

• Remove them from the circuit

• Leave them in the off position

According to BS 7671, how should the insulation resistance test be conducted?

• Between neutral and earth only

• Between line and neutral only

• Between live conductors and earth

• Between line and earth only

What is the significance of recording the worst reading during the insulation resistance test?

• To avoid retesting

• To ensure the highest safety standards

• To simplify the testing process

• To comply with BS 7671 requirements

What is the purpose of using a link during the insulation resistance test setup?

• To increase the voltage

• To connect the RCCBs

• To ensure a short circuit is present

• To test the continuity of the circuit

What is the role of the mega MFT in the insulation resistance test?

• To measure current

• To provide a test voltage of 500 volts DC

• To connect the RCCBs

• To isolate the circuit

What should be done if the insulation resistance test shows a reading greater than 999 mega ohms?

• Reduce the test voltage

• Check for faulty equipment

• Consider the test successful

• Repeat the test with a different voltage

Why is it necessary to adjust two-way switches during the insulation resistance test?

• To ensure all parts of the circuit are tested

• To reduce the test voltage

• To isolate the circuit

• To prevent damage to the switches

What is the final step after completing the insulation resistance test?

• Remove all test equipment

• Re-test the entire circuit

• Document the results

• Increase the test voltage