## Title: Electrical Installation Work

File format: PDF

Book volume: 435 pages

File size: 8MB

Content in details:

### Basic information and calculations

• Units, Indices, Simple algebra, Manipulation or transposition of formula
• The theorem of Pythagoras, Basic trigonometry, Areas and volumes

### Electricity

• Molecules and atoms, Potential difference, Electron and conventional current flow
• Conductors and insulators, Electrical quantities, Ohm’s law, Electricity and the human body, Types and sources of supply
• Voltage bands, Measuring current and voltage, Components of a circuit
• Self-assessment questions

### Resistance, current and voltage, power and energy

• Resistance, Voltage, Power, Electrical energy, Water heating, Efficiency
• Self-assessment questions

### Electromagnetism

• Magnetism, Electromagnetism, Application of magnetic effects
• Waveform of an alternating quantity, Root-mean-square (r.m.s.), Average value
• Three-phase a.c. generator, Inductance, Induced e.m.f. due to change in flux
• Self-inductance, Mutual inductance, Time constant, Graphical derivation of current growth curve
• Energy stored in a magnetic field, Inductance in a.c. circuits
• Resistance and inductance in series (RL circuits) , Impedance
• Resistance and inductance in parallel, Power in a.c. circuits, Transformers
• Self-assessment questions

### Capacitors and capacitance

• Capacitors, Capacitance, Dimensions of capacitors, Capacitors in series & parallel
• Capacitors in d.c. &  a.c. circuits, Capacitive reactance
• Resistance and capacitance in series & parallel, Working voltage
• Applications of capacitors, Self-assessment questions

### Resistance, inductance and capacitance in installation work

• Power factor improvement with self-assessment questions

### Three-phase circuits

• Star-delta connections, The neutral conductor, Current and voltage distribution
• Measurement of power in three-phase systems, Self-assessment questions

### Motors and generators

• Direct-current motors, Alternating-current motors, Starters, Installing a motor
• Fault location and repairs to a.c. machines, Power factor of a.c. motors
• Motor ratings, Self-assessment questions

### Cells and batteries

• General background, The primary cell, The secondary cell, Cell and battery circuits
• Self-assessment questions

### Illumination and ELV lighting

• Light sources, Calculation of lighting requirements, Self-assessment questions

### Electricity, the environment and the community

• Environmental effects of the generation of electricity
• Purpose and function of the National Grid
• Generation, transmission and distribution systems
• The aesthetic effects of the siting of generation and transmission plant

### Health and safety

• The Health and Safety at Work Act 1974, Electricity at Work Regulations 1989
• Personal Protective Equipment Regulations (PPE)
• Construction (Design and Management) Regulations (CDM)
• Control of Substances Hazardous to Health Regulations (COSHH)
• The Building Regulations, General safety, The mechanics of lifting and handling
• Work, load and effort, Access equipment, The joining of materials, Fire safety
• Electrical safety, First aid

### The electrical contracting industry

• Sample specification, Cost of materials and systems

### Installation materials and tools

• Cables, Jointing and terminations, Plastics, Conduit, Trunking, Traywork
• Fixing and tools, Comparison of systems, Self-assessment questions

### Installation circuits and systems

• Lighting circuits & layouts, Power circuits, Space heating systems, Thermostats
• Installation systems, Industrial & Multi-storey installations, Off-peak supplies
• Alarm and emergency systems, Call systems, Emergency lighting systems
• Central heating systems, Extra-low-voltage lighting, Choice of system

### Earthing and bonding

• Earth electrode resistance, Earthing systems, Earth fault loop impedence
• Residual current devices, Supplementary bonding, Self-assessment questions

### Protection

• Protection & Control, Points to note (IEE Reglations)

### Circuit and design

• Design procedure, Design current, Nominal setting of protection, Correction factors
• Current-carrying capacity, Choice of cable size, Voltage drop, Shock risk
• Thermal constraints, Example of circuit design, Design problem

### Testing

• Measurement of electrical quantities, current & voltage
• General instruments, Test instruments, Approved test lamps and indicators
• Accidental RCD operation, Calibration, zeroing and care of instruments
• Testing continuity of protective & ring final circuit conductors, Insulation resistance
• Testing polarity, earth fault loop impedance, earth electrode resistance
• External loop impedance Ze, Prospective fault current, Functional testing
• Periodic inspection, Certification, Inspection and testing, Fault finding

### Basic electronics technology

• Electronics components, Semi-conductors, Rectification, Electronics diagrams
• Self-assessment questions