Calculated Industries 5070-B User Guide - Manual (Page 35)

34 — e
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Wire sizing based on Material Type
Find the Wire Size for a 75°C Copper Wire carrying a 3Ø load of 265
Amps. What is the equivalent Aluminum Wire Size?
KeysTRoKe DIsPlay
 
0.
1. Set to 3-Phase:
  (3Ш)
3Ш
3 Ph
2. Set to 75º C:
 
(75º)
3Ø 75
3 Ph
3. Set to Copper (if necessary):
  (Cu/Al)
3Ø 75 Cu
3 Ph
4. Enter Amps:
   
aMPs 265.
5. Find Wire Size:
 aWG 300 Cu
WIRe sIZe
6. Change to Aluminum:
  (Cu/Al)
3Ø 75 al
aWG 400 al
WIRe sIZe
7. Display Wire Ampacity:
 4ØØ* 270.0
WIRe a
* The Wire Size will be shown in the upper left area of the display when
displaying the Wire Ampacity rating.
8. Display CMIL:

CMIl 400,000.
WIRe
9. Display NEC Table:

neC 310.15.b.16