Electrical Installations Quiz 1960s
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Questions and Answers

What was the primary focus of the supply authority when new domestic electrical installations were finished in the early 1960s?

  • Obtaining a payment commitment from the future electricity bill payer. (correct)
  • Ensuring thorough testing and certification of the installation.
  • Confirming the installer was qualified.
  • Verifying the quality of installed materials.

In the early days, what type of insulation resistance testers were used?

  • Testers that had auto-ranging capabilities.
  • Digital testers powered by batteries.
  • Testers that required manual winding to generate power. (correct)
  • Testers that used mains power directly.

If an insulation resistance test failed (due to a fault like a nail through a cable), what was a common quick fix performed before the meter was installed?

  • Removing fuse wires or disconnecting the neutral of the faulty circuit. (correct)
  • Replacing all the wiring in the house.
  • Rewinding the handle of the testing instrument.
  • Disconnecting the entire installation from the mains.

What is the primary purpose of the 'Earth Electrode' in an electrical installation?

<p>To provide a low-impedance path for fault currents to the earth. (C)</p> Signup and view all the answers

When was earth fault loop impedance typically measured in the early days?

<p>Only when a survey was being carried out. (A)</p> Signup and view all the answers

Which of the following is NOT explicitly verified for 'Main protective bonding conductors' according to the provided format?

<p>Length (D)</p> Signup and view all the answers

Why was it believed to be easier to find a fault in a live electrical system, especially during winter?

<p>A warm house with light provides better working conditions. (B)</p> Signup and view all the answers

What information is required regarding the 'Main Switch or Circuit-breaker'?

<p>The type and number of poles, current rating, and voltage rating. (D)</p> Signup and view all the answers

What common feature did both new and old houses typically share regarding their incoming water supply?

<p>Both typically had copper or iron water mains. (A)</p> Signup and view all the answers

How have practices regarding electrical installations changed most dramatically?

<p>Improvements in education, experience and legislation. (C)</p> Signup and view all the answers

What does 'I Δn' refer to in the context of the Residual Current Device (RCD)?

<p>The rated residual operating current of the RCD. (C)</p> Signup and view all the answers

In the context of the 'COMMENTS ON EXISTING INSTALLATION', what is mentioned as a specific consideration when alterations or additions are made?

<p>Section 633 must be consulted in such cases. (D)</p> Signup and view all the answers

According to the document, what is the primary standard that the design work should adhere to?

<p>BS7671: 2008 amended to (B)</p> Signup and view all the answers

What does the document indicate about the responsibility of the signatories?

<p>Their liability is limited to the work described in this certificate. (C)</p> Signup and view all the answers

If the installation includes changes beyond what is described by the certificate, what would be the implied process?

<p>A new certificate should be issued. (C)</p> Signup and view all the answers

Under what circumstance is a continuation sheet needed?

<p>If the provided spaces on the certificate are insufficient for complete information. (D)</p> Signup and view all the answers

What is the significance of noting departures from BS7671?

<p>It provides a transparent record of deviations from the standard. (D)</p> Signup and view all the answers

What does the term 'design work' refer to, within the context of the certificate?

<p>The process of planning and specifying how the electrical installation should be done. (A)</p> Signup and view all the answers

Which of these is NOT a checkbox option for the type of electrical work?

<p>Repair to an existing installation (B)</p> Signup and view all the answers

What is indicated by the phrase 'having exercised reasonable skill and care'?

<p>The installer has performed the work diligently and to the best of their ability. (C)</p> Signup and view all the answers

What does the certificate number likely indicate?

<p>The unique identifier of the certificate. (D)</p> Signup and view all the answers

Where are departures from standards detailed?

<p>Within the document in a specified location. (B)</p> Signup and view all the answers

What is the main purpose of the 'FOR DESIGN' section in the document?

<p>To identify the individuals responsible for the electrical installation's design. (D)</p> Signup and view all the answers

What information is required within the 'FOR CONSTRUCTION' section?

<p>The signature, date, and printed name of the constructor, alongside a statement of compliance with BS7671, noting any departures. (A)</p> Signup and view all the answers

According to the document, what should be included in the 'Details of departures from BS7671' section?

<p>Any deviations from BS7671 standards during construction or testing. (B)</p> Signup and view all the answers

What is the limitation of liability for the signatories in this document?

<p>Liability is limited to the scope of work they are responsible for, as described on the certificate. (B)</p> Signup and view all the answers

Which of the following best describes the overall structure of the document?

<p>A unified document covering design, construction, and testing, where different parties take responsibility. (D)</p> Signup and view all the answers

In addition to a signature and date, what else is explicitly stated as being essential information for all signatories?

<p>Their name written in block capitals. (A)</p> Signup and view all the answers

What is the specific standard that all listed activities should adhere to?

<p>BS7671: 2008 (D)</p> Signup and view all the answers

Where are the details of any project discrepancies noted?

<p>Specifically noted in their respective sections, for the work they are relevant to. (B)</p> Signup and view all the answers

Who is responsible for the certification of the construction work?

<p>The constructor of the installation. (C)</p> Signup and view all the answers

What does the phrase 'exercised reasonable skill and care' imply in the context of this document?

<p>That the work was carried out to the best of the signatories’ abilities and in a professional manner. (A)</p> Signup and view all the answers

What is the primary purpose of the Building Regulation Part P?

<p>To ensure electrical safety in domestic installations. (B)</p> Signup and view all the answers

According to the Building Regulation Part P, with which regulations must electrical work comply?

<p>The Electricity at Work Regulations 1989. (B)</p> Signup and view all the answers

What document outlines the specific standards for electrical wiring that must be followed under Part P?

<p>BS 7671 Electrical Wiring Regulations. (A)</p> Signup and view all the answers

What is the responsibility of the electricity distributor regarding flood risks, according to Part P?

<p>To install the supply cut-out in a safe location, considering the risk of flooding. (C)</p> Signup and view all the answers

What building regulation must be complied with, in relation to accessibility, according to Part P?

<p>Part M. (C)</p> Signup and view all the answers

What must be done to verify an electrical installation is safe before it is put into service?

<p>Inspection and testing. (A)</p> Signup and view all the answers

How is compliance with Part P typically demonstrated?

<p>By issuing the correct electrical installation certificate. (B)</p> Signup and view all the answers

What is the key difference between a BS 7671 certificate and a building regulation compliance certificate?

<p>Building regulation certificates show compliance with all building regulations, not just Part P. (C)</p> Signup and view all the answers

What is the requirement for non-notifiable electrical work under Part P?

<p>It must comply with BS 7671 and certificates should be completed. (A)</p> Signup and view all the answers

Flashcards

Electrical Installation Inspection

The process of inspecting and verifying that electrical installations meet safety standards.

Insulation Resistance Test

A type of test that measures the resistance of electrical insulation, helping detect faults in wiring.

Earth Fault Loop Impedance

The resistance encountered by an earth fault current when returning to the power source.

Earth Fault Loop Impedance (EFLI) Tester

A type of protective device that interrupts the flow of electricity when a fault occurs, preventing electrical shock and fire.

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Live System Testing

The practice of conducting electrical work while the power is on, allowing for easier fault detection, but requiring caution.

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Domestic Installation Certification

When the electrical system in a house is inspected and certified to meet safety standards.

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Evolution of Electrical Installations

A major shift in approach towards electrical installations, with advancements in materials, methods, and regulations to ensure safety.

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Building Regulation Part P

A set of regulations introduced in 2005 to ensure electrical safety in domestic installations. It aims to control electrical work in homes by ensuring compliance with specific standards and regulations, promoting safe and reliable electrical installations.

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BS 7671 Electrical Wiring Regulations

A comprehensive set of regulations covering electrical wiring and installation practices. It is a crucial reference for electricians and inspectors.

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Inspection and Testing of Electrical Installations

A mandatory step to be taken for a new electrical installation before it is put into service. This includes thorough inspection and testing to verify compliance with safety standards.

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Electrical Installation Certificate

An official document issued to demonstrate compliance with BS 7671 and Part P regulations. It provides evidence that the electrical installation meets safety standards and requirements.

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Notifiable Work

A type of electrical work categorized as needing notification to the local authority before it can be carried out. This is due to the potential safety risks involved in the work.

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Building Regulation Compliance Certificate

A formal document issued by a local authority signifying the completion of notifiable work. It verifies that the project adheres to building regulations and safety standards.

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Inspection and Testing of Non-Notifiable Work

Even if the work doesn't require notification, it must still be executed according to BS 7671 and appropriate certificates must be completed.

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Compliance with BS 7671

A primary requirement for electrical installations. This includes verifying that all electrical work adheres to BS 7671 and that the final installation is safe and functional.

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Compliance with Electricity at Work Regulations

This regulation states that electrical work must comply with the 1989 Electricity at Work regulations and any changes to the mains supply must be approved by the energy supplier.

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Description of Installation

A document that provides specific details about an electrical installation, including its purpose, location, and any deviations from standards.

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Alteration to an existing installation

Any changes or modifications made to an existing electrical installation, covered by the certificate.

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Design of the electrical installation

The process of planning and designing an electrical system, ensuring it meets safety regulations and functional requirements.

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Departures from BS 7671

Any departures from the standard electrical regulations (BS 7671) outlined in the electrical installation certificate.

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Person(s) responsible for the design

The person or persons responsible for the design and safety of the electrical system.

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Details of the Client

A document that provides details about the client who requested the electrical installation work.

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Installation Address

The address where the electrical installation is located.

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Extent of installation covered by this Certificate

A section that outlines the extent and scope of the certified installation work.

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CERTIFY that the design work...

A certified statement acknowledging that the design of the electrical installation complies with applicable regulations.

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Electrical Installation Design Certificate

A document that confirms the design of an electrical installation adheres to safety standards. Signed by both designers responsible for the project.

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Electrical Installation Construction Certificate

A document that confirms the construction of an electrical installation adheres to safety standards. Signed by the person(s) responsible for construction.

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Electrical Installation Inspection and Testing Certificate

A document that confirms the inspection and testing of an electrical installation adheres to safety standards. Signed by the person(s) responsible for inspection and testing.

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BS7671: 2008

A standard used in the UK to ensure electrical safety in installations. It outlines regulations and requirements.

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Electrical Installation Testing

The act of verifying the safety of an electrical installation by using specialized equipment to test different aspects of the system.

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Insulation Resistance

A measure of the resistance of electrical insulation, used to detect faults and potential hazards.

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Earth Fault Loop Impedance Test

A test that measures the resistance of the path that an earth fault current would take, ensuring safety.

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Main Switch Type

The type of protective device used for the main switch or circuit breaker, e.g. BS 3871, BS EN 60898.

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Current Rating

The maximum amount of current the main switch or circuit breaker can handle before interrupting the circuit.

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Voltage Rating

The voltage at which the main switch or circuit breaker operates.

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Fuse Rating

The maximum current the fuse can handle before blowing, protecting the circuit from overloads.

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RCD Settings (IΔn and Operating Time)

The rated residual operating current (IΔn) is the maximum fault current that the RCD will allow to flow before tripping. The operating time is how quickly it trips.

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Study Notes

  • This book is a practical guide to inspection, testing, and certification of electrical installations.
  • It conforms to the 17th Edition IET Wiring Regulations.
  • The author is Christopher Kitcher.
  • The book is dedicated to the author's grandchildren.

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Practical Guide to Inspection of Electrical Installations PDF

Description

Test your knowledge on domestic electrical installations from the early 1960s. This quiz covers insulation resistance testing, fault identification, and key components like the Earth Electrode and Residual Current Device. Delve into historical practices and regulations in electrical systems.

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