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Apr 14, 2018

EBOOK - Practical guide to inspection testing and certification of electrical installations (Christopher Kitcher)


EBOOK - Hướng dẫn thực hành kiếm tra test các thông số lắp đặt điện (Christopher Kitcher) - 225 Trang.

Part P of the Building Regulations came into effect on the 1st of January 2005. This part of the Building Regulations requires that all electrical work carried out in domestic installations now has to be certificated. For work places, the Electricity at Work Regulations 1989 require that they provide a safe and well maintained electrical system. Certification and well kept records are a perfect way to confirm that every effort has been made to ensure that the system is, and remains safe.

I have written this book to assist electricians of all levels in carrying out the inspecting, testing and certification of all types of electrical installations. It will also be invaluable to City and Guilds 2330 level 2 and 3 students, electricians studying for City and Guilds 2391parts 101 and 102 and all tradesmen who are required to comply with Building Regulation part P.
Step by step guidance and advice is given on how to carry out a detailed visual inspection during initial verifications, periodic inspections and certification. Text and colour photographs of real, not simulated installations, are used to show the correct test instruments. Step by step instructions for how to carry out each test safely using different types of instruments are given along with an explanation as to why the tests are required.

CONTENTS:

1. Inspection and testing of electrical installations . . . . . . . . . . . . . . . . . . .1
Why inspect and test? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Section 1. Design, Installation, Inspection and Testing . . . . . . . . . . . . .2
Section 2. Extensions, Material alterations and material
changes of use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Section 3. Information about other legislation . . . . . . . . . . . . . . . . . . .3
Compliance with Building Regulations Part P . . . . . . . . . . . . . . . . . . . . . .4
Earthing and bonding to comply with Part P . . . . . . . . . . . . . . . . . . . . . . .5
Registered domestic installer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Unregistered competent person . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
DIY installer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2. Types of certification required for inspecting and testing
of installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Certification required for domestic installations (Part P) . . . . . . . . . . . . . .9
Minor Electrical Installation Works Certificate . . . . . . . . . . . . . . . . . . .9
Part P, Domestic Electrical Installation Certificate . . . . . . . . . . . . . . . . .9
Periodic inspection, testing and reporting . . . . . . . . . . . . . . . . . . . . .10
Certification required for the inspecting and testing of
installations other than domestic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Minor Electrical Installation Works Certificate . . . . . . . . . . . . . . . . . .11
Electrical Installation Certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Initial verification inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Initial verification testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Periodic inspection report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Periodic inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Three phase circuit/systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Periodic testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Voltage drop in conductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
3. Testing of electrical installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Safe isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Isolation procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Testing for continuity of protective conductors . . . . . . . . . . . . . . . . . . . .31
Main equipotential bonding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Continuity of supplementary bonding . . . . . . . . . . . . . . . . . . . . . . . .35
Continuity of circuit protective conductors . . . . . . . . . . . . . . . . . . . .40
Method one . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Method two . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Ring final circuit test . . . . . . . . . . . . . . . . .

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