Unit 035 Knowledge Questions 7-17

Explain how to obtain and interpret drawings, circuit diagrams and physical layouts,

• From the workplace or technical library

• With the equipment or component you are about to fit

• From the internet.

• From someone at work.

Answer explanation

The way to obtain any drawings, circuit diagrams or instructions will be from a technical library at work. They will have been obtained from an authority and approved source such as the manufacturer and can be BS ISO accredited.

Using drawings and diagrams from the manufacturer that came with the component you are about to fit is also acceptable.

Sourcing information from the internet has to be done very carefully, it may be out of date and wrong so should not be used unless authorised.

Why do we have BS (British Standards) and ISO (International Standards)

• It helps standardise work practices and compliance with legislation.

• Everybody will be using them same techniques.

• Its a clear way of maintaining and installing equipment or components.

• It is the best practice to follow and is updated on a regular basis when necessary.

What assembly methods and techniques can be used when wiring electrical panels

• Crimping

• Stripping

• Securing

• Soldering

Answer explanation

We can use all of the techniques.

Some are permanent such as soldering.

Some can be semi-permanent such as screwed terminations. They need physical force to be removed.

Ty-wraps can be used to neaten and tidy cables. Mounts can be used with spiral-wrap or snake skins to offer protection of the cables

What preparations need to be undertaken on the components and panel, prior to mounting.

• Visual Inspections

• Functional checks

• Planning your task thoroughly

• Cleaning the panel.

Answer explanation

All answers are correct. Always check a component before fitting it. It is suitable for the circuit. For example fuses and resistors are colour coded. Check they are correct before fitting. Visual checks are simple and can identify straight away if a component is broken.

If you cant see or tell, a multimeter can tell if a fuse is broken.

A 9v battery can check to see if the motor works.

A thorough plan should cover all checks.

How would you ensure components are aligned and positioned prior to securing

and the tools and equipment that are used

• Check another persons work.

• Read wiring diagrams maintenance manuals.

• 
• 

Answer explanation

Checking other peoples work can lead to making the same faults. If the work has been tested and commissioned it usually is safe to do so.

What methods of attaching identification markers/labels during electrical assembly activities are used?

• 
• 
• 
• 

Answer explanation

All methods can be used to identify cables.

What gauge of cable are we using?

• 200 AWG

• 50 AWG

• 2 AWG

• 20 AWG

Answer explanation

It is ideal for use across a wide variety of electrical power, lighting and internal wiring applications. The flexible hook up cable can be used for reliable cable connections in a neat and well-organised layout.

It is Ideal for low voltage multi-purpose cable installations such as our wiring panel.

It is a flexible cable with a durable PVC protective sheath and copper conductors, available in multiple colours, ideal for colour-coding cable installations

Why is electrical bonding/earthing critical, and why it must be both mechanically and electrically secure

• It is a safety requirement to comply with BS7671

• It is a safety requirement to comply with BS7671.

  If it is not electrically secure it will still be ok.

• It is a safety requirement to comply with BS7671.

  If it is not mechanically secure it will still be ok.

• It is a safety requirement to comply with BS7671.

  it needs to be mechanically and electrically secure for it to be safe in all normal conditions.

Answer explanation

Earthing is provided to connect exposed-conductive-parts to the main earthing terminal, to provide a path to earth for fault current in the event of a fault.

Protective bonding is provided to connect extraneous-conductive-parts to the main earthing terminal, to prevent a potential difference occurring and creating a hazardous touch voltage.

Describe the use of BS7671/IET wiring, and other regulations, when selecting wires and cables and when carrying out tests on electrical circuits

• 
• Ask the tutor i will help answer this 1-1

• 

Answer explanation

This question does not directly relate to our panel so i will explain it 1-1 or in small groups.