I need to determine number of cables in trefoil
2783A total
240mm2 90C (terminations OK for 130C) flexible
unbalanced so have neutrals
50% earth
2 layers of trefoils. 6 3 phase + 2 neutral + 1 earth = 27 cables (9 trefoils)
6 sets 607 x .91 x..86 x .97?
Manufacturer says use 775 x 0.91 4sets
Please advise
Also IEC60364 has no 0.97 flexible cable de-rating factor....
Kindest regards
