Calculated Industries 5070-B User Guide - Manual (Page 37)

36 — e
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alc
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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?
KeysTRoKe DIsPlay
 
0.
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?
KeysTRoKe DIsPlay
  0.