Calculated Industries 5065 - Manual (Page 52)

User’s Guide — 47
You can use single or multiple service
entrance conductor(s) to find the
grounding electrode conductor for AC
systems. When using multiple conduc-
tors, the
ElectriCalc Pro uses the
equivalent Circular Mils to find the
grounding electrode conductor (based
on NEC Table 250-66).
Find the grounding electrode conductor
wire size required when 2/0 is the larg-
est 3-phase 75°C copper service-
entrance conductor being used. What
is the equivalent aluminum size? What is
the equivalent Circular Mils?
Steps Keystrokes Display
Clear calculator
o o
0.
Set to 3-phase
S 3
3 PH
Set to 75º C
S 7
3Ø 75 Cu 3 PH
Enter wire size*
0 0 w AWG 00 CU
WIRE SIZE
Find ground wire
G
GRND 4 CU
size WIRE SIZE
Find aluminum size
G
GRND 2 AL
WIRE SIZE
Find Circular Mils
G
CMIL 133,100.
WIRE
Display NEC Table
G
NEC 250.66
* Wire size can also be entered in Circular
Mils (e.g.,
1 3 3 1 0 0 w
enters
133,100 CMILs and displays 00 AWG wire
size).
Ground Conductor Wire Size