Calculated Industries 5025 - Manual (Page 40)

38 — ElectriCalc LT
Equipment Grounding
Conductor Wire Size
The [Set] [Grnd] keystroke can be used
to find the grounding conductor size for
raceways and “over-current devices in
circuit ahead” equipment. The calculator
uses the displayed amperage value to
solve for the equipment grounding con-
ductor 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
Reset calculator [Set] [x] 0.
Set cond. temp. [Set] 9 3Ø 90 Cu 0.
Enter amp rating 45 [Amps] 45. AMPS
Find equip. grnd.
wire size
[Set] [Grnd] 10 CU
EQPG WIRE SIZE
Find alum size [Grnd] 8 AL
EQPG WIRE SIZE