Southwire VFD Cable Selector
System Rating
60°C
75°C
90°C
Motor Nameplate Voltage
230 Volts
460 Volts
575 Volts
HorsePower
1/2 hp
3/4 hp
1 hp
1 1/2 hp
2 hp
3 hp
5 hp
7 1/2 hp
10 hp
15 hp
20 hp
25 hp
30 hp
40 hp
50 hp
60 hp
75 hp
100 hp
125 hp
150 hp
200 hp
250 hp
300 hp
350 hp
400 hp
450 hp
500 hp
Maximum Ambient Temperature
(>10°C) / (>50°F)
(11 - 15°C) / (51 - 59°F)
(16 - 20°C) / (60 - 68°F)
(21 - 25°C) / (69 - 77°F)
(26 - 30°C) / (78 - 86°F) default
(31 - 35°C) / (87 - 95°F)
(36 - 40°C) / (96 - 104°F)
(41 - 45°C) / (105 - 114°F)
(46 - 50°C) / (114 - 122°F)
(51 - 55°C) / (123 - 131°F)
(56 - 60°C) / (132 - 140°F)
(61 - 65°C) / (141 - 149°F)
(66 - 70°C) / (150 - 158°F)
(71 - 75°C) / (159 - 167°F)
(76 - 80°C) / (168 - 176°F)
(81 - 85°C) / (177 - 185°F)
Cable Length (Feet)
Full Load Amps (Amps)*
Ampacity Rating (Amps)**
Number of Cables to use
1
2 in parallel
3 in parallel
4 in parallel
VFD Cable Size (AWG or kcmil)***
Voltage Drop (Volts)
Voltage Drop (%)
* per 430.6(A)(1) of the 2020 National Electric Code.
** per Table 430.250 of the 2020 National Electric Code.
*** per Table 310.16 of the 2020 National Electric Code.
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