10 —
e
lectri
c
alc
®
P
ro
(cont’d)
♦ Fourth Press
If a Wire Length has been entered, displays
the minimum Wire Ampacity rating. If no Wire
Length has been entered, displays the NEC
table referenced for the calculation.
125% ampacity —
Used for Motor Wire Sizing
when the Wire must not exceed 80% of its rated
Ampacity (125%A). This keystroke calculates Wire
Size based on 125% of the entered or calculated
Amps value.
parallel Size —
Used to find the size of parallel
conductors using Amperage and an entered
quantity of Wires. Parallel Wire Size calculations
smaller than 1/0 will display
none
, as the NEC
does not allow Parallel Wire runs smaller than 1/0.
♦ First Press
When preceded by a number, calculates the
applicable Wire Size for that quantity of
Wires in parallel.
♦ Second Press
Displays the maximum adjusted Ampacity of the
calculated Parallel Wire Size.
Note:
No adjustments are made for deration.
Derated Wire Size (D/r Size) —
Used to
calculate Derated Wire Sizes and allowable
Ampacity based on the entered quantity of wires,
NEC Table 310.15(B)(16) and NEC Table
310.15(B)(3)(a). Derated Wire Sizes are not
calculated when there are less than four Wires, or
when the unit is in Free Air mode.
♦ First Press
Calculates the Derated Wire Size, if you have
entered the number of Wires.
