Cable size

l.t cable

h.t cable

0.5 sq. in.

0.1 sq. in. (22,000 volts)

0.1 sq. in. (132,000 volts)

I.E.E rating

540 amperes

191 amperes

191 amperes

Armour wire thickness

=ht22000

=lt

0.104 in.

Core loss (copper loss)

0.16 watt

0.1 watt

0.01 watt

Eddy loss in the armour

0.17 watt

0.021 watt

0.008 watt

Hysteresis loss in the armour

0.08 watt

0.016 watt

0.009 watt

Total armour loss

0.25 watt

0.037 watt

0.017 watt

Ratio (armour loss)/(copper loss), percent

1%

37%

17%