Questions in power engineering

[Jason_tcs]

May I know seek advice from experienced guys because I have interview test for my power engineering as below. Thank you.

a) For 600A switchboard, what type of device setting need to do?
Can I say that I need to do setting for direct acting for MCCB since more than 300A and Earth fault relay setting?Any other else?

b) How to calculate the Earth fault setting since some use ELR and EFR with the setting range only 0.03A to 3A or 10A and so on for the switchboard below 700A?

c) What is the sequence for electrical testing need to do for the bungalow when electrical installation completed before supply is turn on?

Can I say need the test below:

earth electrode test
Continuity test
Ring final circuit test
Insulation test

d) How we apply the value of Earth fault loop impedance value and Earth electrode resistance value?

 

[Illmatic1]

For this question, you can explain that Earth fault loop impedance value is used for calculating the maximum earth fault current that should not exceed the rating of the protective device. The Earth electrode resistance value is used to ensure that the circuit is properly earthed and to check the integrity of the earthing system.