Prospective |Fault Current Testing

What is the external earth loop impedance?

• The loop to earth

• A resistance to earth

• The external resistance back to transformer

• A christmas pudding

Should the main earthing conductor be removed or terminated for the EFLI test?

• It should be removed

• It should be terminated

• It should be attached to the line conductor with a connector.

• It shoud be safely locked-off

When performing a EFLI test with 2 leads, which setting should the Multi-Function Tester be set on to?

• Ze 2Lo

• Ze 3 Hi

• Zs 2 lead

• R1 +R2

What is the quoted Ze from the DNO for a TNC-S earthing system?

• 0.8 ohms

• 200 ohms

• 0.35 ohms

• 0.4 seconds

What is PFC

• Passive Fault Current

• Prospective Fault Collection

• Prospective Fault Current

• Perfect For College

Should the earthing conductor be terminated in the Main Earth Terminal ( MET), for Prospective Earth Fault Current testing?

• No, it should be disconnected

• No, terminate using a Wago connector.

• Yes, connect via a connector to the line or R1 cable.

• Yes, re-connect for this test.

What types of PFC testing are there?

• Prospective Earth Fault Current ( PEFC), and Prospective Short Circuit Current ( PSCC)

• PFC and EFLI ( Earth Fault Loop Impedance)

• 2 lead PFC and 3 lead PFC

Which reading do you record on the Test Schedule of an EIC ( Electrical Installation Certificate), or EICR ( Electrical Installation Condition Report)?

• The lower of the PEFC and PSCC

• The Prospective Earth Fault Current result

• The Prospective Short Circuit Current result

• The higher of the PFC and PFCC.