Specifications

Technical Information
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TECHNICAL INFO
Power Formulas
CONDUCTOR PROPERTIES FOR
INSULATED ANNEALED COPPER DIRECT CURRENT RESISTANCE  OHMS PER 1000 FEET
COPPER
AWG
TEMPERATURE °F/°C
CROSS
SECTIONAL AREA
CIRCULAR MILS
167/75 149/65 77/25 68/20
18 Solid 7.77 7.519 6.515 6.390 1,620
18 Stranded 7.95 7.693 6.666 6.538 1,620
16 Solid 4.89 4.732 4.100 4.021 2,580
16 Stranded 4.99 4.829 4.184 4.104 2,580
14 Solid 3.07 2.971 2.574 2.525 4,110
14 Stranded 3.14 3.039 2.633 2.582 4,110
12 Solid 1.93 1.868 1.618 1.587 6,530
12 Stranded 1.98 1.916 1.660 1.628 6,530
10 Solid 1.21 1.171 1.015 0.995 10,380
10 Stranded 1.24 1.200 1.040 1.020 10,380
8 Solid 0.764 0.739 0.641 0.628 16,510
8 Stranded 0.778 0.753 0.652 0.640 16,510
6 Stranded 0.491 0.475 0.412 0.404 26,240
4 Stranded 0.308 0.298 0.258 0.253 41,740
2 Stranded 0.194 0.188 0.163 0.160 66,360
1/0 Stranded 0.122 0.118 0.102 0.100 105,600
2/0 Stranded 0.097 0.094 0.081 0.080 133,100
Source: 2008 Edition of National Electric Code (NFPA 70), Chapter 9, Table 8.
System designer must use resistance values which correlate to temperatures and applications for each specific project.
FULL LOAD AMPERAGE FLA
MOTOR
HP
SINGLE PHASE
A-C
THREE PHASE A-C INDUCTION TYPE
SQUIRREL CAGE & WOUND ROTOR
115 VOLTS 230 VOLTS** 230 VOLTS** 460 VOLTS 575 VOLTS
1/2 9.8 4.9 2.2 1.1 0.9
3/4 13.8 6.9 3.2 1.6 1.3
1 16 8 4.2 2.1 1.7
1 1/2 20 10 6.0 3.0 2.4
2 24 12 6.8 3.4 2.7
3 34 17 9.6 4.8 3.9
5 56 28 15.2 7.6 6.1
7 1/2 80 40 22 11 9
10 100 50 28 14 11
15 42 21 17
20 54 27 22
25 68 34 27
30 80 40 32
40 104 52 41
50 130 65 52
60 154 77 62
75 192 96 77
100 240 120 96
125 296 148 118
150 350 175 140
200 456 228 182
250 558 279 223
**For 208V applications, increase the 230V FLA by 10%
To calculate the FLA of a pump motor operating on a VFD,
multiple the nominal FLA by 1.24
To estimate FLA station, multiply the largest load by 1.25 and
then add this to remaining component FLAs.
Example: a 460V 2 x 50HP pump station with a 5HP PM pump
would have an FLA of 173.4 Amps.
173.4 Amps = 1.24 x 1.25 x 65A + 65A + 7.6A
HORSEPOWER TO KILOWATTS
HORSEPOWER KILOWATT HORSEPOWER KILOWATT
1 0.746 25 18.7
3 2.2 30 22.4
5 3.7 40 29.8
10 7.5 50 37.3
15 11.2 60 44.8
20 14.9 75 56.0