Calculated Industries 5060 - Manual (Page 53)

User’s Guide — 51
Ground Conductor Wire Size
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 75º C
S 7
3Ø 75 Cu 0.
Enter wire size
00 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
Set to 60º C
S 6 o
0.
and Clear