Sizing temperature-adjusted derated wires – Calculated Industries 5060 User Manual
Page 46
![background image](/manuals/585194/46/background.png)
44 — ElectriCalc Pro
Sizing Temperature-Adjusted
Derated Wires
A circuit was built with 90°C aluminum
wire connecting a 47,650 volt-amp load
to a 240 volt, single-phase source.
Ambient temperature is 50°C. What is
the derated wire size required if eight
current-carrying THHN wires were in-
stalled in the raceway?
Steps
Keystrokes
Display
Clear calculator
o o
0.
Set to 1-phase
S 1
1 PH
Set to 90°C
S 9
1Ø 90 Cu 1 PH
Toggle to alum.
S 4
1Ø 90 Al 1 PH
Enter volt-amps
47650V VA 47,650.
Enter volts
240 U
VOLT 240.
Set to 50°C amb
50 S 2
AMB 50 °C
Find adjst wire sz.
w
AWG 300 AL
WIRE SIZE
Find derated
8 S P
D/R 500 AL
wire size
WIRE SIZE
Display Wire
P
D/R 114.0
Ampacity
AI AMB WIRE A
Display Adjustment
P
ADJ 57. %
Factor
AI AMB
Display NEC Table
P
NEC 310.15
NOTE: All Settings should be changed back
to default to avoid conflicts in answers
throughout the rest of this manual.
* NOTE: See “Settings” for a list of
Permanent Values/settings. Changing
these settings may affect your calculations.