Tray sizing as per NEC-392.9

Selectec Tray Type Ladder or Vented ThroughDepth of Cable Tray 4" 100 mm

A 15.252 inches

3.709 inches

B Calculation as per Table 392.9(A1)(1)(C) Column 2 16.550

Condition to meet is A < B or TRUEC 16.4184

Minimum allowable width is 18" that is > 16.4184"

D

E Spare Capacity 1.581599Note:

Tray size Calculations for 4/0 AWG (107 sq.mm) or larger cables installed in the same cable tray with cables smaller than 4/0 AWG

The sum of the cross-sectionalareas of all cables smaller than 4/0 AWG = 107 sq.mm (A)

The sum of the diameters, in mm, of all cables 107.2 mm (in inches, of all 4/0 AWG) and larger multiconductor cables in the same cable tray with smaller cables = Sd

Hence minimum inside width of Selected Tray should be 18" that's 450 mm for this set of cables.

The value “A” in formula in C only applies to cables smaller than 4/0. The value “Sd” only applies to 4/0 and larger cables, which must be single layer

Tray sizing as per NEC-392.9

Ladder or Vented Through

Cable Size Cable Qty Cable O.D. Sum of OD (in) Area (in^2)

3C-240 2 1.85433171 3.709 2.701

0.000 0.000

3C-16 10 0.69291376 6.929 0.377

4C-10 3 0.66535469 1.996 0.348

3C-10 10 0.62598459 6.260 0.308

4C-6 2 0.54724439 1.094 0.235

3C-6 2 0.59448851 1.189 0.278

4C-4 3 0.53937037 1.618 0.228

3C-4 6 0.50000027 3.000 0.196

3C-2.5 15 0.464567186.969 0.170

4C-1.5 11 0.4724412 5.197 0.175

37.961 5.016

Tray size Calculations for 4/0 AWG (107 sq.mm) or larger cables installed in the same cable tray with cables smaller than 4/0

Tray sizing as per NEC-392.9

Sum Area (in^2)

5.401

0.000

3.771

1.043

3.078

0.470

0.555

0.685

1.178

2.543

1.928

20.653

Tray size Calculations for 4/0 AWG (107 sq.mm) or larger cables installed in the same cable tray with cables smaller than 4/0