Calculated Industries ElectriCalc LT User Manual page 34

IMPORTANT NOTE ON
VOLTAGE DROP CALCULATIONS
The ElectriCalc LT calculates voltage
drop and wire size using DC resistance
values as defined by the 1999 NEC. To
find the voltage drop for a specific wire
size, you must first enter amps (and the
other required variables), then enter the
specific wire size. Otherwise, if amps
are entered last, the calculator will re-
calculate the wire size to match the '99
NEC Ampacity Table requirements.
Finding Single-Phase
Voltage Drop
You are installing 175 feet of 75°C, 8
THW branch circuit copper conductors
to supply an 11-amp load on a 208-volt
1Ø system. What is the source voltage
drop at the load? What is the percent-
age?
Steps Keystrokes
Reset calculator [Set] [x]
Set to 1-phase [Set] 1
Set to 75°C [Set] 7
Enter amps 11 [Amps]
Enter volts 208 [Volts]
Enter length 175 [Length]
(Cont'd)
32 — ElectriCalc LT
Display
0.
1 PH
1Ø 75 Cu 1 PH
11. AMPS
208. VOLT
175. FEET