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Ampacity Tables
The ElectriCalc LT uses NEC Table
310-16 (310-17 for Free Air) to find wire
sizes and ampacity ratings of wires. The
calculator uses the following data to
calculate wire size: 1) insulation tem-
perature rating (60°C, 75°C and 90°C),
2) wire material (copper or aluminum),
and 3) ambient temperature. Only stan-
dard AWG wire sizes are used by the
ElectriCalc LT.
NOTE: 1/0, 2/0, 3/0 and 4/0 wires are
entered using the [0] key (i.e., 0, 00, 000
and 0000).
[WireSz] — Wire Size/Ampacity
Enters or calculates wire size based on
ampacity and voltage drop, if a voltage
drop length has been entered.
First Press
If a wire length has been entered, the
first press will show the larger of the
ampacity or voltage drop derived wire
size. The calculator will use the larger
value when calculations require a wire
size. If no voltage drop length has been
entered, the calculator will display the
calculated ampacity rated wire size.
User's Guide — 9
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