Calculated Industries 5060 - Manual (Page 48)

46 — ElectriCalc Pro
IMPORTANT NOTE ON
VOLTAGE DROP CALCULATIONS
The ElectriCalc Pro calculates voltage
drop and wire size using DC resistance
as defined by the 2005 NEC. To find
the voltage drop for a specific wire size,
you must first enter amps and the one-
way wire length (and other required
variables), entering the specific wire
size last.
Otherwise, for your safety the calcula-
tor will recalculate the wire sizes based
on the ‘99 NEC Ampacity Tables and
maximum allowable voltage drop.
Finding Single-Phase
Voltage Drop
You are installing 175 feet of 75°C, #8
THW branch circuit copper conductors
to supply an 11A load on a 208V 1Ø
system. What is the source voltage
drop at the load?
Steps Keystrokes Display
Clear calculator
o o
0.
Set to 1-phase
S 1
1 PH
Set to 75°C
S 7
1Ø 75 Cu 1 PH
Enter amps
11 A
AMPS 11.
Enter volts
208 U
VOLT 208.
Enter length
175 l
FEET 175.
Enter wire size
8 w
AWG 8 CU
WIRE SIZE
Solve volt. drop
v
DROP 3.0 V
Solve % v.drop
v
DROP 1.4 V %