Electrical Installation Level 4

What are the key principles of electrical circuit design?

• Newton's Laws of Motion, Boyle's Law, and Archimedes' Principle

• Pythagorean Theorem, Law of Sines, and Law of Cosines

• Hooke's Law, Pascal's Law, and Bernoulli's Principle

• Ohm's Law, Kirchhoff's Laws, circuit analysis techniques, component selection, and safety considerations

Why is it important to follow safety regulations in electrical installation?

• To impress clients with advanced techniques

• To prevent accidents, ensure safety, protect property, and comply with legal requirements.

• To increase energy efficiency and reduce costs

• To make the installation process faster and easier

Name three types of electrical wiring systems commonly used in installations.

• Conduit wiring, cleat wiring, casing and capping wiring

• Wireless wiring, twisted wiring, underground wiring

How do you test and troubleshoot electrical circuits effectively?

• Follow a systematic approach by checking power supply, inspecting connections, using a multimeter, identifying faulty components, and replacing them.

• Guess which component is faulty

• Ignore safety precautions and work with live circuits

• Hit the circuit with a hammer

Explain the process of electrical load calculations in installations.

• Diversity factors are not considered in load calculations

• The process of electrical load calculations in installations involves identifying the wattage of each device, calculating the total wattage, considering diversity factors, and sizing the electrical components accordingly.

• The total wattage is divided by the number of devices to get the load

• The process involves counting the number of outlets only

What are the steps involved in the installation of electrical distribution boards?

• Skipping planning and layout

• Planning layout, mounting securely, connecting power supply, installing circuit breakers, connecting wires, labeling circuits

• Not labeling circuits

• Using incorrect circuit breakers

Why is it important to consider voltage drop in electrical installations?

• To increase the efficiency of the electrical system

• To ensure that the voltage supplied to the load remains within acceptable limits and prevent issues such as overheating, inefficiency, and premature failure of equipment.

• To reduce the risk of lightning strikes

• To improve the aesthetics of the installation

What safety measures should be taken when working with electrical circuits?

• Wear metal jewelry while working

• Work on circuits with wet hands

• Ignore warning labels on equipment

• Wear insulated gloves, use tools with insulated handles, de-energize the circuit before working on it, follow lockout/tagout procedures.

Describe the differences between series and parallel circuits.

• The temperature at which they operate

• The size of the components

• The main difference between series and parallel circuits is how the components are connected and how the current flows through them.

• The color of the wires used

What are the common tools used for testing electrical circuits?

• Flashlights, tape measures, wrenches

• Thermometers, rulers, calculators

• Screwdrivers, pliers, hammers

• Multimeters, circuit testers, continuity testers, voltage testers