Hereunder we're making available to our visitors some of the most common calculations and conversion tables used in the industries which we work with. We hope you find them of use.



Motor HP, Amps and Wire/Conduit Size Table

HP Voltage Amps Wire Size Conduit Size
(Dia. Inches)
5 480/3 7 (3)#12 AWG+(1)#12 GND 3/4" 
10 480/3 14 (3)#10 AWG+(1)#12 GND 3/4" 
15 480/3 21 (3)#10 AWG+(1)#10 GND 3/4" 
20 480/3 27 (3)#8 AWG+(1)#10 GND 3/4" 
25 480/3 34 (3)#8 AWG+(1)#10 GND 3/4" 
30 480/3 40 (3)#8 AWG+(1)#10 GND 3/4" 
40 480/3 52 (3)#6 AWG+(1)#8 GND 1"
50 480/3 60 (3)#4 AWG+(1)#8 GND 1 1/4"
60 480/3 77 (3)#3 AWG+(1)#6 GND 1 1/2"
75 480/3 96 (3)#2 AWG+(1)#6 GND 1 1/2"
100 480/3 124 (3) 2/0+(1)#6 GND 2"
125 480/3 156 (3) 4/0+(1)#4 GND 2 1/2"
150 480/3 180 (3) 4/0+(1)#4 GND 2 1/2"
200 480/3 240 (3) 250 MCM+(1)#3 GND 3"
250 480/3 300 (6) 3/0+(1)#3 GND 3"
480/3 350 (6) 4/0+(1)#3 GND 4"
300 480/3 360 (6) 250 MCM+(2)#1 GND (2) 2 1/2" or  (1) 4"
400 480/3 480 (6) 300 MCM+(2)#1 GND (2) 3" or  (1) 5"
500 480/3 600 (6) 500 MCM+(2) 1/0 GND (2) 3" or  (1) 5"
600 480/3 720 (6) 600 MCM+(2) 2/0 GND (2) 3"
1250 4160/3 148 (3) 3/0+(1)#6 GND 3"
1500 4160/3 177 (3) 4/0+(1) 2/0 GND 4"

Online calculators

Conversion tables