Page 296 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

12 mm Conduit

Length CDEF ( 1 + 1.5+0.5) = 3 m
Length Dh = 2.0+0.4 m
Length EG = 2.0+0.4 m
Length BJK = (2+1) = 3.0 m

Length JNVWY (0.4+2+2+1) = 5.4 m
Length JL = 2.0 m
Length JN = 0.4 m
Length NM = 2.0 m
Length YL6 = 0.5 m

Length POR = 4.0+1+0.4m
Total = 26.5 m
Vertical down drops (horizontal run to SB’s) :
19 mm conduit
Length A to SB-4 = 1.5M

Length D to SB-2 = 1.5M
Length E to SB-3 = 1.5M
Length J to SB-1 = 1.5M
Length N to SB-5 = 1.5M
Length A to roof = 0.5M

Length D to roof = 0.5M
Length E to roof = 0.5M
Length N to roof = 0.5M
Length J to roof = 0.5M

Total = 10 M

Total 19 mm conduit required = 1.4+10=11.4 m
Total 12mm conduit required = 26.5M

Wastage10% = 2.65M
Total = 29.15 Take (30 M)
Cable for (power) sub circuit -3 (1/1.8mAl) = 3 x (4+1+1.5+1.5 ) = 21M
Cable for Subcircuit 1&2 (1.0sq mm copper)
3 x (6+10+26.5) = 127.5M

Meter Board = 2 points
Distribution board = 2 points
Light/Fan = 15 Points
Power = 2 Points
Total = 21 points

279

CITS : Power - Electrician & Wireman - Exercise 105 CITS : Power - Electrician & Wireman - Exercise 105