Calculated Industries 5065 - Manual (Page 53)

48 — ElectriCalc Pro
The
S G
keystroke can be used
to find the grounding conductor size for
raceways and “over-current devices in
circuit ahead” equipment. The calcula-
tor uses the displayed amperage value
to solve for the equipment grounding
conductor based on NEC Table
250-122.
Find the equipment grounding conduc-
tor size required when the circuit-
breaker is rated at 45 Amps and 90°
copper is being used in the installation.
What is the equivalent aluminum size?
Steps Keystrokes Display
Clear calculator
o o
0.
Set to 90º C
S 9
3Ø 90 Cu 0.
Enter Amp rating
4 5 A
AMPS 45.
Find equipment
ground wire size
S G
EQPG 10 CU
WIRE SIZE
Find aluminum size
G
EQPG 8 AL
WIRE SIZE
Display NEC Table
G
NEC 250.122
Reset to 60˚C
S 6 o 3Ø 60 Cu 0.
and Clear
Equipment Grounding
Conductor Wire Size