City & Guilds Fundamental Inspection, Testing and Initial Verification 2392-10

Underpinning knowledge

For each topic below, the candidate will be able to:

Instruments

3.1 State the need for instruments to be regularly checked and the need for compliance with the requirements of BS 7671 (current edition) and HSE Guidance Note GS 38

3.2 List the correct instruments, functions and appropriate scale(s) to carry out each test and explain the reasons for each choice

Sequence

3.3 State the recommended sequence of tests covered by this unit and the reasons for that sequence

Protective Conductors

3.4 State the requirements which need to be considered for protective conductors in terms of

1. a) earthing conductors
2. b) main protective bonding conductors
3. c) supplementary equipotential bonding conductors
4. d) circuit protective conductors

3.5 Describe the need for, and methods of, verifying the continuity of protective conductors and the interpretation of results

3.6 State the relationship between conductor length, cross sectional area (csa) and resistance

3.7 State the effect of temperature on conductor resistance.

Ring Final Circuits

3.8 State the effect on conductor resistance when cables are connected in parallel

3.9 Describe the need for, and the method of verifying the continuity of, ring final circuit conductors and the interpretation of results

3.10 State the relationship between conductor length and conductor resistance.

30 Level 2 Certificate in Fundamental Inspection, Testing and Initial Verification (2392-10)

3.11 Explain, by example, the effect on insulation resistance of

1. a) cables connected in parallel
2. b) variation in cable length

3.12 State the difference between measurements taken for insulation resistance and conductor resistance, and the order of magnitude that would be expected in each case

3.13 State the preconditions required for the performance of insulation resistance testing in terms of:

1. a) client consultation
2. b) safety procedures and notices

3.14 State the precautions to be taken before testing insulation resistance in terms of

1. a) isolation of circuits and equipment
2. b) voltage sensitive equipment
3. c) electronic components

3.15 Describe methods of testing insulation resistance

3.16 State the required test voltages and minimum values of insulation resistance for circuits operating at various voltages

SELV

3.17 Describe the test to verify separation between SELV circuits and other circuits.

Special Installations and locations

3.18 State the requirements for locations containing baths or showers in terms of

1. a) circuits
2. b) equipment
3. c) zones.

IP Code

3.19 State the appropriate degrees of protection required for given locations and environments

afforded within the IP classification BS EN 60529.

Polarity

3.20 State the reasons for tests to confirm correct polarity

3.21 Describe the methods of testing used to identify correct polarity

3.22 State the reasons for confirming correct polarity following initial energising of installations.

Prospective Fault Current

3.31 Describe prospective fault current in terms of

a) prospective short-circuit current

b) prospective earth fault current

3.32 State methods of determining prospective fault current

3.33 Describe the methods of measuring prospective fault current

3.34 Explain the importance of confirming that protective devices are appropriate for the prospective fault current.

Verification of voltage drop

3.35 State the methods of evaluating voltage drop

3.36 Determine compliance with voltage drop from given criteria.

Candidates will be required to complete the following two assessments:

• One 1.5 hour on-line multiple choice test covering outcomes 1-3 consisting of 50 questions (2392-101)
• One practical assessment for the unit (2392-102)

Successful candidates will achieve a City and Guilds Certification in Fundamental Inspection, Testing and Initial Verification 2392-10 certificate.