Podcast
Questions and Answers
What happens when a single breakout mounted breaker is removed?
What happens when a single breakout mounted breaker is removed?
- The power remains on for all the circuit breakers
- The power automatically turns off (correct)
- The power turns off for all the circuit breakers
- The power turns off for only that particular breaker
What is a challenge when handling drawout mounted breakers?
What is a challenge when handling drawout mounted breakers?
- They are too expensive to handle
- They are difficult to manipulate by hand due to their weight and size (correct)
- They are too small to handle
- They are too fragile to handle
How are drawout mounted breakers typically installed and removed?
How are drawout mounted breakers typically installed and removed?
- By hand
- By using a crane
- By using a jacking screw and then hoisted onto a support (correct)
- By using a pulley system
What must be done before testing and removing a drawout mounted breaker?
What must be done before testing and removing a drawout mounted breaker?
What is a key difference between daylight and artificial lighting?
What is a key difference between daylight and artificial lighting?
What is a consideration when designing outdoor lighting systems?
What is a consideration when designing outdoor lighting systems?
What is the lumen method of lighting design a measure of?
What is the lumen method of lighting design a measure of?
What does a higher value of luminous efficacy indicate?
What does a higher value of luminous efficacy indicate?
What is the primary difference between daylighting and artificial lighting?
What is the primary difference between daylighting and artificial lighting?
What is essential for a successful floodlighting project?
What is essential for a successful floodlighting project?
Why is it important to consider the appearance of a building at night-time during its design stage?
Why is it important to consider the appearance of a building at night-time during its design stage?
What is the primary purpose of a ring main system in domestic wiring?
What is the primary purpose of a ring main system in domestic wiring?
What is the rating of a live conductor in a ring or power circuit?
What is the rating of a live conductor in a ring or power circuit?
What is the purpose of an earth loop in a ring or power circuit?
What is the purpose of an earth loop in a ring or power circuit?
Why is it important to consider the aesthetic values of the architecture when floodlighting a building?
Why is it important to consider the aesthetic values of the architecture when floodlighting a building?
What is the benefit of floodlighting ancient monuments and civic buildings?
What is the benefit of floodlighting ancient monuments and civic buildings?
What is the main reason for providing a range of values for each lamp type?
What is the main reason for providing a range of values for each lamp type?
What is a key consideration when choosing fittings for outdoor use?
What is a key consideration when choosing fittings for outdoor use?
What is a requirement for the daytime appearance of luminaires and columns?
What is a requirement for the daytime appearance of luminaires and columns?
What type of lamps require adjustable mounting arrangements?
What type of lamps require adjustable mounting arrangements?
Why is accurate aiming important in floodlighting systems?
Why is accurate aiming important in floodlighting systems?
What is the primary purpose of electrical conduits and conduit fittings?
What is the primary purpose of electrical conduits and conduit fittings?
What factors should be considered when selecting the material, size, and fittings of electrical conduits?
What factors should be considered when selecting the material, size, and fittings of electrical conduits?
Why is ease of access to the lamp, reflector, and front glass important in luminaires?
Why is ease of access to the lamp, reflector, and front glass important in luminaires?
Study Notes
Drawout Mounted Breakers
- Interlocked for safety, automatically turning off power when a single unit is removed
- Large and bulky, requiring a jacking screw and support for installation and removal
- Can be replaced without disconnecting power, but testing and removal require the load to be turned off
Conduit Systems
- Important considerations for daylight and artificial lighting
- Different orders of contrast and object relationships in daylight vs. artificial lighting
- Direction and distribution of light vary between day and night
- Lighting equipment must be visually acceptable in daylight
Lighting Design
- Lumen method measures lamp efficiency in converting electrical power to light
- Higher luminous efficacy indicates greater efficiency
- Daylighting is general and non-selective, while artificial lighting can reveal specific buildings
- Floodlighting can enhance architectural features and landscapes
Lighting Applications
- Bedrooms: consider lighting design in early stages to enhance interior features
- Halls: importance of lighting design in enhancing interior features
- Corridors: importance of lighting design in enhancing interior features
Basic Wiring Systems
- Two major ways of wiring in domestic buildings: ring main and radial systems
- Ring main system: fuse or miniature circuit breaker protected sub-circuit with a 32 amp rating
- Radial system: not specified in the provided text
Lighting Installation and Maintenance
- Consideration of design life and maintenance ease in choosing outdoor fittings
- Importance of initial cost, maintenance frequency, and economics in installation
- Daytime appearance of luminaires and columns should be in keeping with surroundings
- Mounting arrangements vary based on lamp type and burning position
- Accurate aiming and ease of access for relamping and cleaning are important
Electrical Conduits and Conduit Fittings
- Used to protect electrical cables and wires in various environments
- Material, size, and fittings chosen based on installation surroundings and wiring type
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Description
This quiz covers the safety features and installation procedures of drawout mounted breakers, including their interlocking mechanism and handling requirements.
