I started a new thread in the testing section with this post, but it seemed invisible to anyone except me!
Didn't seem too bad?
It lacked the usual earthing system diagram and the insulation resistance calculation.
Couple of questions that I've remembered:
Section A:
If a MCB has a Ics of 10kA and a Icn of 6kA and an overload of 8kA occurs, what action should you take?
State three human senses that could be used during an inspection of an installation.
What documents should you be provided with when carrying out a PIR?
a) What is the maximum impedance for a 300mA RCD protected TT system?
b) What is the maximum allowable earth electrode resistance?
c) how would you test a TT system with a 300mA RCD
What are the required test voltages for the following circuits:
a) 12v SELV
b) 650V
c) 400v Kiln circuit
List the correct names of the conductors that connect these items to the main earthing terminal:
a) earth electrode
b) incoming gas pipe
c) forgotten
List three precautions to be taken prior to commencing an insulation test.
State the IP code of:
a) Something in Zone 2 of a bathroom
b) A barrier? in a DB that can be accessed with out the use of tools
c) forgotton!
State the earthing arrangement at the supply that has that has:
a) supply with the only earth located at the supply transformer
b) a multicore supply cable with a seperate earth and neutral
c) PEN
If a ring continuity circuit has resistances of L-L 0.4ohm, N-N 0.4ohm, CPC 0.? What will the resistance be if measured at a socket? (possibly asking R1+ R2, can't remember!)
State 3 functional tests that should be carried out after testing a socket(???) circuit?
What happens to the resistance of a conductor if its 0.4ohm to start with:
It halves in in length?
It doubles in diameter?
It doubles in length and halves in diameter?
Section B:
Scenario involving a house that needed to be PIR'd, had a garage connected with SWA and had a loft extension that had had a new lighting circuit, socket circuit and shower? Also new CCU fitted.
List 5 checks you would make on the SWA as part of the PIR.
Explain how you would do these checks.
State two Statutory DOCUMENTS relevant to inspection and testing.
State three non-statutory PUBLICATIONS relevant to inspection and testing.
List all the documents to be completed for the scenario mentioned.
Explain how to perform a CPC continuity test on a lighting circuit.
Explain the dangers of using faulty testing equipment?
List the tests in order that you would carry out on a newly installed ring final circuit.
a) Explain why the measures Zs values cannot be directly compared to the maximum tabulated values in BS7671
b) calculate from the table given whether the stated Zs values would comply with BS7671 after calculating the correction factor (it wasn't worded like this!)
Explain IN DETAIL the testing current and the maximum trip time of a 30mA RCD.
State the dangers of a RCD test. Or requirements?
That's all I can remember!
