Test And Spec

Question 1

What will the inspector issue when a new circuit is added to an existing installation

Answer 1

An initial verification certificate

Question 2

What’s the correct document to be completed when additional socket has been added to an A1 ring circuit?

Answer 2

Minor electrical installation works certificate

Question 3

What’s the unit of measure for an insulation test

Answer 3

M omhs

Question 4

Unit of measure for a PFC instrument

Answer 4

kA

Question 5

What’s the maximum test current applied to a 30mA RCD

Answer 5

5x30=150mA

Question 6

One item of information that isn’t included on a minor works cert.

Answer 6

External loop impedance (Ze)

Question 7

How do you calculate the ipscc?

Answer 7

IPFC= V/ZE

Question 8

What’s required to do before an insulation resistance test?

Answer 8

Remove all loads from the circuit

Question 9

What instrument is used to carry out continuity of prospective conductors tests?

Answer 9

A low ohms meter

Question 10

On a socket ring when you cross the cpc’s and line conductors what will you be testing?

Answer 10

R1+R2 values

Question 11

What will the mains intake current be recorded as?

Answer 11

Prospective fault current

Question 12

How do u calculate the expected value of R1+R2 for a ring circuit

Answer 12

Line+cpc/4

Question 13

Supplementary bonding conductors that are not protected from mechanical damage shall have a cpc no smaller than?

Answer 13

4 sqmm

Question 14

What’s the maximum test current that will be applied to a 100mA RCD

Answer 14

100mA

Question 15

If you double the amount of circuits
What will happen to the insulation resistance

Answer 15

Decrease

Question 16

Supplementary bonding conductors that are protected against mechanical damage shall have a csa of

Answer 16

2.5sqmm

Question 17

What type of instrument will measure leakage current in a circuit

Answer 17

Clamp meter

Question 18

When a certificate is issued for initial verification for the certificate to be valid what must it be accompanied by

Answer 18

Test results sheet

Question 19

Nest Inspection dates for domestic

Answer 19

10 years max (recommendation)

Question 20

Next inspection dates for flats/hotels/student residents

Answer 20

5 years max (law)

Question 21

Next inspection dates for commercial/ shops

Answer 21

5 years max (law)

Question 22

Next inspection dates for industrial

Answer 22

3 years max (law)

Question 23

Next inspection dates for building sites

Answer 23

3 months (law)

Question 24

Are the schedule of test results and the circuit schedule be kept together as one document?

Answer 24

NO

Question 25

Who calls up the next date on an initial verification

Answer 25

The designer and after that the inspector and tester

Question 26

Tell me about minor works certificate? How many sheets? Additional schedules? How many signatures?

Answer 26

Single sheet 1 signature No additional schedules

Question 27

Tell me about electrical condition report certificate (“periodic”) How many signatures? Addition schedules?

Answer 27

2 signatures (inspector and tester, the person commissioning the work) 3 further schedules

Question 28

Tell me about electrical installation cert How many signatures and who How many schedules

Answer 28

3 signatures installer, designer, tester and inspector 3 schedules (inspect schedule, test schedule, schedule of circuits)

Question 29

Order for dead testing

Answer 29

1.Continuity testing 2.insulation resistance 3.polarity check

Question 30

Order of live testing

Answer 30

1.Voltage verification 2.earth fault loop impedance 3.RCD 4.functional testing

Question 31

What methods would u use to find zs

Answer 31

By calculation or testing

Question 32

How many separate circuits will you complete of initial verification

Answer 32

3

Question 33

What document needs to be posted adjacent to the consumer unit

Answer 33

Schedule of circuits

Question 34

If you spot something dangerous outside the agreed scope of the inspection and test report, what is your immediate action?

Answer 34

Include it in your report!

Question 35

Describe test method 1

Answer 35

R1+r2

Question 36

Describe test method 2

Answer 36

Long lead

Question 37

What is the one circuit where the neutral presents a safety issue?

Answer 37

Ring circuit finale

Question 38

When testing r1+ r2 on lights, what wiring circuit requires you to test at both at the light and at the switches?

Answer 38

Spider wiring and 3 plate at the light

Question 39

R1+R2 on a light circuit which wiring type requires you to test only at the light?

Answer 39

Mains at switch

Question 40

When testing a 2 way lighting circuit what must you ensure you test?

Answer 40

Both strappers

Question 41

How many IR test on A single phase consumer unit would be absolute minimum?

Answer 41

3 for every circuit

Question 42

How many IR tests are there for a 3 phase unit

Answer 42

10

Question 43

Name me 3 reasons on why you test polarity on dead testing

Answer 43

Cross connections All single pole devices are in the line only Edison screw lamp holders have the centre contact in the line only

Question 44

What test method should be employed for polarity?

Answer 44

Test method 1

Question 45

5 pre checks to be carried out on a low reading ohm meter?

Answer 45

Case, leads, zero, calibration date, batteries

Question 46

3 requirements of GS38?

Answer 46

4mm max exposed tip preferably 2mm , finger guards, coloured leads

Question 47

What 3 zones is bathrooms and up codes

Answer 47

Zone 0 IPx7 zone 1 and 2 IPx4

Question 48

An RCD is rated at 30mA should trip within what time?

Answer 48

300ms

Question 49

Correct sequence for safe isolation?

Answer 49

Identify circuit, isolate, prove dead, lock off, retest

Question 50

Earth fault loop impedance (ZS) is measured to ensure?

Answer 50

Fault current is high enough to trip protective devices

Question 51

What should u expect for a r1+r2 on a ring finale circuit

Answer 51

0.3-0.5 ohms