ALL TIME ZONES
SCHOOL OF ENERGY, GEOSCIENCE, INFRASTRUCTURE & SOCIETY
Architectural Engineering
D19EL
ELECTRICAL AND LIGHTING SERVICES FOR BUILDINGS
Semester 1 – 2020/2021
Date: December 2020
Duration: 24 Hours
Answer ALL THREE questions.
All questions carry equal marks.
Heriot-Watt University Electrical And Lighting Services For Buildings D19EL – 2020/2021
Page 2 of 6
Question 1
(a) For the space shown in Figure Q1, estimate the electrical load and clearly state
the units. Where specific dimensions are not given please estimate.
(35 Marks)
(b) A data centre building has a total floor area 4000m2,of which 2,800m2 is used
for data processing equipment and the remainder as general office space. The
building has electrical air conditioning throughout. Estimate the electrical load
and size a suitable transformer (or transformers) for the building and specify an
appropriate make and model. You may include a data sheet in your answer.
(35 Marks)
(c) For the space shown in Figure Q1 discuss the different types of electrical load
and what their relative influence is on the overall load profile of the building.
Use sketches and equations to illustrate your answers. Any reasonable
assumption regarding the type of equipment expected in the office space is
acceptable.
(30 Marks)
Question 2
Discuss the methods for protection against electrical shock described in BSEN
7671(2008), the IEE Wiring Regulations. Your answer should include reference to
restrictions in the application of particular methods.
(100 marks)
(Word Limit: 750 words)
Question 3
The increased use of daylighting in buildings offers a significant opportunity to reduce
the amount of energy consumption associated with electric lighting schemes. Explain
why this is the case and describe the range of techniques that could be applied in
order to achieve this reduction.
(100 marks)
(Word Limit: 750 words)
END OF PAPER
Heriot-Watt University Electrical And Lighting Services For Buildings D19EL – 2020/2021
Figure Q1
