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GOVT. ENGINEERING COLLEGE

ELECTRICAL AND ELECTRONICS ENGINEERING DEPT.

EE09 801- ELECTRICAL SYSTEM DESIGN

FIRST SERIES TEST –March 2016– S8 EE-B

Time: 90minutesMax. 38

marks

1. Explain the followings( Marks – 08)

a. Need of earthing at substations and buildings.

b. MCB, MCCB and ELCB

c. Main board and distribution board

d. If calculated value of load current in a single point is 2. !"pere, then

what would be the rating of cable to be selected# Co""ent.

2. $e%ne the followings with its signi%cance,

(Marks – 06) 

a. Lu"inous &ux, lu"inance intensit', Illu"inance and Lu"inaire

b. Maintenance factor

c. C(I

). ! residential wiring has total of )*+ atts. -he building has, -Ls / 0 nos, an/ ) nos, 1! plug point / 1 nos, Exhaustfan / *, 3ower plug / 2 nos. $raw a

single line diagra" showing cutout, "eter, "ain switch, "ain distribution board

and other e4uip"ent5s. Ma6e 'our own assu"ptions for nu"ber of electrical

points in each subcircuit and %nd7calculate total length of cable, rating of "ain

switch and distribution board. !lso "ention t'pe of protective device to be

used. ( Marks – 14)

 Assume height of ceiling is 3m from oor level, Wall thickness – 0.2m.

 Answer all questions from the

N

8pen areaan / *, -Ls

9itchen / 33 2Exan / *, 1!3 *.1"

E(oa 1" -Ls 2

an / *, 1! 3 2

).1":"

-Ls 2an / *, 1! 3 2

*+"

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. a; Explain in detail the Law of Illu"ination with su of +.:, a la"p e