Electric Systems in Building: Components and Considerations

Play an AI-generated podcast conversation about this lesson

What is the purpose of a transformer in an electric system in a building?

To provide safe access to electric meter
To switch (transform) from high supply voltage to service voltage (correct)
To calculate electricity consumption
To control and protect branch circuits

Where should the service switch be located in a building?

Inside a unit for easy access by residents
Inside the building away from the main entrance
Outside the unit for accessibility by officials (correct)
Next to the main feeder lines

What is the function of a branch circuit in an electric system of a building?

To control and protect the main feeder lines
To calculate electricity consumption
To contain final distribution points (correct)
To distribute large incoming power supply

Why are overhead service connections preferred in some buildings?

They are easier to maintain (A) Signup and view all the answers

What is the purpose of a main switchboard in an electric system of a building?

To distribute large incoming power supply into smaller parcels (B) Signup and view all the answers

Which of the below statements listed below is true about using wind power as an alternative to fossil fuels in some countries?

Appealing alternative to fossil fuels, especially in countries with scarce petroleum and ample wind (C) Signup and view all the answers

In electrical system design, what role does the interior designer play?

Designing the lighting for the building (A) Signup and view all the answers

What component of the electrical panel protects the wiring system from overload?

Fuses or circuit breakers (B) Signup and view all the answers

Which of the below listed energy sources is considered 'clean'?

Wind Power (A) Signup and view all the answers

What kind of drawing does the interior design use to indicate locations of electrical outlets and lighting fixtures?

Electric and lighting plan (C) Signup and view all the answers

Why is it dangerous to use plug-in devices like hairdryers near water sources?

It poses a risk of electric shock to users (A) Signup and view all the answers

Which building areas are prohibited for the use of flat cables?

Bathrooms and other wet areas (D) Signup and view all the answers

What advantage do busways offer over conventional wiring methods?

Simplified connections with plug-in receptacles (B) Signup and view all the answers

Which statement about underfloor ducts is true?

They allow frequent changes in wiring and outlet locations (D) Signup and view all the answers

What is a potential disadvantage of underfloor ducts?

They are expensive and inflexible in layout (D) Signup and view all the answers

Electric cables are must always be buried into the building structure.

False (B) Signup and view all the answers

flat conductor cable (FCC) is recommended for use under stone and wood finish floors

False (B) Signup and view all the answers

What kind of electric wiring distribution is used in some kinds of Flexible Track Lighting Fixtures?

Low Voltage Wiring (A) Signup and view all the answers

How many separate electric meters are required when one plot of land has two residential units?

2 meters, 1 meter for each unit (B) Signup and view all the answers

How many separate electric meters are required when one plot of land has three units - two residential and one commercial?

2 meters, one of the residential units and one for the commercial unit (A) Signup and view all the answers

SCENARIO: your are finalizing the design of a private home when your electric engineer informs you that the electric power load she/he calculated surpasses the plot's maximum load allocated by DEWA. What can you do as an interior designer to resolve the issue?

Work with the electric engineer to specify kitchen appliances, HVAC system, and other electric equipment with better electric ratings (C) Signup and view all the answers

Match the following with their description:

Raceways = Provide safety while allowing access for communication cabling Raceway tray = Also provides safety and access for communication cabling Underfloor ducts = Special rectangular ducts with many access boxes for attaching fixtures Surface raceway = Includes conduit and raceway suspended above hung ceilings Signup and view all the answers

Match the following with their location in a building:

Conduit in the floor slab = Buried in the building's structure Underfloor ducts = Installed below or flush with the floor Surface raceway = Attached to the structure as surface raceway Parallel metal raceways = Laid on structural slab and covered in concrete fill Signup and view all the answers

Match the following with their primary purpose:

Underfloor ducts = To locate outlets away from walls and partitions Raceways = Getting wiring where it is needed with excellent access Surface raceway = Position power, data, and signal outlets close to desk regardless of furniture layout Raceway tray = Bulky trays that provide safety for communication cabling Signup and view all the answers

Match the following with their common usage area:

Office buildings and computer facilities = Special rectangular underfloor ducts for frequent wiring changes Prestige office buildings, museums, galleries = Use underfloor ducts for rearranging electrical and signal services often Industrial facilities = May use underfloor ducts for rearranging systems frequently Open floor areas with set grid = Utilize underfloor ducts to locate outlets away from walls Signup and view all the answers

Match the following with their characteristic:

Surface raceways = Somewhat unsightly but provide excellent access without opening up walls and ceilings Underfloor ducts = Sometimes result in underutilization of area due to inflexible layout Parallel metal raceways = Expensive due to being cast in concrete Raceway tray = Must either be exposed or accessible through hung ceiling Signup and view all the answers