2. Calculate Cable Trunking Size

CALCULATE CABLE TRUNKING SIZE

Example: Calculate PVC Trunking size for following Power Cables running through Trunking .Consider 10% as Future expansion

• 30 No’s of 1.5 Sq.mm Stranded Cables * 50 No’s of 2.5 Sq.mm Stranded Cables * 20 No’s of 4 Sq.mm Stranded Cables

Cable Factor for Trunking as per IEEE

Type of Cable Size of Cable Factor Solid 1.5 7.1 Solid 2.5 10.2 Stranded 1.5 8.1 Stranded 2.5 11.4 Stranded 4 15.2 Stranded 6 22.9 Stranded 10 36.3 Stranded 16 50.3 Stranded 25 75.4 Stranded 35 95 Stranded 50 132.7 Stranded 70 176.7 Stranded 95 227 Stranded 120 284 Stranded 150 346

Trunking Factor As per IEEE

Trunking Size (mm) Factor 75 X 25 738 50 X 37.5 767 100 X 50 993 50 x 50 1037 75 X 37.5 1146 100 X 37.5 1542 75 X 50 1555 100 X 50 2091 75 X 75 2371 150 X 50 3161 100 X 75 3189 100 X 100 4252 150 X 75 4787 150 X 100 6414 150 X 150 9575

CALCULATIONS:

• As per Table Cable Factor for 1.5 Sq.mm Stranded Cable=8.1 * As per Table Cable Factor for 2.5 Sq.mm Stranded Cable=11.4 * As per Table Cable Factor for 2.5 Sq.mm Stranded Cable=22.9 * Total Cable Factor= No of Cables X Cable Factor * Total Cable Factor=(30X8.1)+(50X11.4)+(20X22.9) * Total Cable Factor=1271 * Total Cable Factor After 10% Future Expansion=1271+127 =1398 * As per Table Suitable Size for PVC Trunking for Cable Factor 1398 is 100 X 37.5

SUITABLE PVC TRUNKING IS 100 X 37.5 MM