Electrical Inspection and Certification Testing. A Guide to Passing the City and Guilds 2391 Exams. Edition 2020 (PDF)

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  • Sku: KS16925VUK
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About the book:

Edition: 2020;
Pages: 182;
Author: Michael Drury;
Publisher: Routledge;
Language: English;
Size: 1 Mb;


1. Statutory and non-statutory regulations
Legal responsibilities
The memorandum of guidance on the electricity at work regulations 1989 BS 7671 wiring regulations
Inspector's status: differentiating between the terms in law and legal IET guidance note 3 inspection and testing
2. Certification and reports
Electrical installation certificate (EIC)
Schedule of inspection
Minor electrical installation works certificate (minor works certificate)
Electrical installation condition report (EldeR)
Condition report inspection schedule (for domestic and similar premises with up to 100A supply)
Schedule of test results
3. Electrical safety
Regulation 12 - means for cutting off the supply and for isolation
Regulation 13 - precaution for work on equipment made dead
Regulation 14 - work on or near live conductors
Isolation procedure
Terminology: electrical charge and live
HSE GS 38: electrical test equipment for use on low voltage electrical systems 53
Installation Testing
Initial verification
Sequence of tests
Test sequence
Instrument check
Safe isolation
Test 1 i): Continuity of protective conductors
Continuity of protective conductor; testing methods
Test 1 ii): Continuity of ring final circuit conductors
Spurious results
Test 2 Insulation resistance
Testing preliminaries
Test results
Test 3 i): Confirming SELV or PELV circuits by insulation testing
Testing procedure
Test 3 ii): Electrical separation
Test 4: Insulation resistance/impedance of floors and walls
Test 5: Polarity testing
Test B: Protection by automatic disconnection of supply (ADS)
Test 7: Earth electrode resistance
Test 8: Earth fault loop impedance verification
Measurement of earth fault loop impedance (Zs)
Measurement of external earth fault loop impedance (Ze)
Test 9: Prospective fault current (lpf)
Reasons for measuring PSCC and PEFC
Breaking capacities
Test 10: Additional protection
Test 11: Phase sequence
Test 12: Functional testing
Test 13: Verification of voltage drop
Verification in medical locations
Temporary overvoltages due to high voltage systems
Verification of protection against overvoltages of atmospheric origin or due to switching
Selection and erection of surge protective devices
Verification of measures against electromagnetic disturbance
5. Initial verification
The purpose of the initial verification
Departures from BS 7671
Foremost inspection
Inspection of installed equipment
Inspector's responsibilities
Required information
6. Periodic inspection
Purpose of periodic inspection and testing
Necessity for Periodic inspection and testing
Required information
What action should be taken where diagrams, charts or tables are not available?
What is a survey?
Setting the sample size
Results of sampled inspection and testing
Frequency of periodic inspections
7. Initial verification and periodic inspection questions
8. Further questions
9. Equations and calculations
Cable resistance
Voltage drop
Earth fault loop impedance
Insulation resistance
Insulation resistivity
RCD used fault protection
C&G 2391-50, 51 and 52 syllabi
Glossary of terms

Tags: guide 2391 Exam book, Electrical Inspection guide, Electrical testing guide, 2391 Exam guide

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