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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Seventh Semester B.Tech Degree Examination (Regular and Supplementary), December 2020

Course Code: EE405
Course Name: Electrical System Design

Max. Marks: 100 Duration: 3 Hours
PART A
Answer all questions, each carries 5 marks. Marks
1 Explain the scope of the following IS codes: IS 732, IS 3043 (5)
2 What are the factors to be considered while selecting the type of wiring? (5)
3 What is meant by selective coordination in electrical distribution system? (5)
4 What is the purpose of earthing in an electrical installation? Distinguish (5)

between system earthing and equipment earthing.

5 A lamp giving out 1200 1൩ in all directions is suspended 8 m above the (5)
working plane. Calculate the illumination at a point on the working plane 6 m

away from the foot of the lamp.

6 Discuss the significance of LLF and its components. (5)
7 Which are the energy conservation techniques in lighting? (5)
8 What is automatic transfer switch? Explain. (5)
PART B
Answer any two full questions, each carries 10 marks.
9 a) Explain the salient features of electricity act 2003. (5)
b) Describe electric services in buildings. (5)

10 a) A single storied residential building with two bedrooms with attached toilets, (10)
one dining room, one living room, kitchen, and sit out. Decide the required
number of light points, fan points, SA socket outlet, 154 socket outlet. Decide
the number of sub circuits required. Determine the connected load, type of
supply required, sub circuits required, maximum demand.

11 a) What are the special features in the electrical installation for a high-rise (5)
building than a domestic installation?

b) Which are the pre-commissioning tests on a domestic installation? (5)

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