Calculated Industries 5070-A User Guide User Manual
Page 37
36 — e
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finding Derated Wire size
What is the Derated Wire Size required for nine 75°C Copper wires,
each carrying a maximum load of 65 Amps?
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1. Set to 75º C:
(75º)
75
0.
2. Set to Copper (if necessary):
(Cu/Al)
75 Cu
0.
3. Enter Amps:
aMPs 65.
4. Find normal Wire Size:
aWG 6 Cu
WIRe sIZe
5. Find Derated Wire Size:
(D/R Size)
D/R 3 Cu
WIRe sIZe
6. Display Wire Ampacity:
D/R 45.5
WIRe a
7. Display Adjustment Factor:
aDJ 70.
%
8. Display NEC Table:
neC 310.15.b.3
sizing Temperature-adjusted Derated Wires
A circuit was built with 60°C Copper wire connecting a 47,650 Volt-
Amp load to a 240 Volt, Three-Phase source. Ambient Temperature
is 50°C. What is the Derated Wire Size required if eight current-
carrying THHN wires are installed in the raceway?
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