Calculated Industries ElectriCalc Pro User Manual

36 — electricalc
®
Pro
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.

Calculated Industries ElectriCalc Pro Specifications

General

Type	Scientific
Cover	Yes
Form factor	Pocket
Control type	Buttons
Product color	Yellow
Digits	8 digits
Display type	LCD
Display tilting	No
Display size (HxV)	15.88 x 63.5 mm
Display number of lines	- lines
Display size (HxV) (imperial)	0.625 x 2.5 \
Storage media type	-
Battery type	CR2016
Power source	Battery
Battery voltage	3 V
Number of batteries supported	1

Weight and Dimensions

Depth	16 mm
Width	76 mm
Height	142 mm
Weight	127.5 g