Ace Industries Wire Sizing Guide
Single Phase - 115 Volts (115/1/60)
Single Phase - 230 Volts (230/1/60)
Three Phase - 208 Volts (208/3/60)
Three Phase - 230 Volts (230/3/60)
Three Phase - 460 Volts (460/3/60)
Warning
Wire Sizing Selection Tables
There are several factors that must be considered before determining the proper
size wire to select for an application. Items you must consider are:
- Source Voltage
- Number of Phases
- Horsepower or amperage of the motor(s)
- Length of the Cable or Run
The charts below contain recommended minimum wire size (AWG) for different
voltage, horsepower and cable length combinations. These charts are only a guide.
Please consult the National Electric Code (NEC) and any applicable local standards
for exact requirements.
Single Phase (115 Volt) - Wire
Size Selection Guide* |
HP |
Cable Length |
Up to 30'' |
31'' - 50'' |
51'' - 75'' |
76'' - 100'' |
101'' - 150'' |
1/2 |
14 |
14 |
12 |
10 |
8 |
3/4 |
14 |
12 |
10 |
10 |
8 |
1 |
14 |
12 |
10 |
8 |
6 |
1 1/2 |
12 |
10 |
8 |
8 |
6 |
2 |
12 |
10 |
8 |
6 |
6 |
3 |
10 |
8 |
6 |
6 |
4 |
Single Phase (230 Volt) - Wire
Size Selection Guide* |
HP |
Cable Length |
Up to 30'' |
31'' - 50'' |
51'' - 75'' |
76'' - 100'' |
101'' - 150'' |
1/2 |
14 |
14 |
14 |
14 |
14 |
3/4 |
14 |
14 |
14 |
14 |
14 |
1 |
14 |
14 |
14 |
14 |
12 |
1 1/2 |
14 |
14 |
14 |
14 |
12 |
2 |
14 |
14 |
14 |
12 |
12 |
3 |
14 |
14 |
12 |
12 |
10 |
Three Phase (208 Volt) - Wire
Size Selection Guide* |
HP |
Cable Length |
Up to 30'' |
31'' - 50'' |
51'' - 75'' |
76'' - 100'' |
101'' - 150'' |
1/2 |
14 |
14 |
14 |
14 |
14 |
3/4 |
14 |
14 |
14 |
14 |
14 |
1 |
14 |
14 |
14 |
14 |
14 |
1 1/2 |
14 |
14 |
14 |
14 |
14 |
2 |
14 |
14 |
14 |
14 |
14 |
3 |
14 |
14 |
14 |
14 |
12 |
5 |
14 |
14 |
12 |
12 |
10 |
7 1/2 |
14 |
12 |
10 |
10 |
8 |
10 |
14 |
12 |
10 |
8 |
6 |
15 |
12 |
10 |
8 |
6 |
6 |
20 |
12 |
8 |
8 |
6 |
4 |
25 |
10 |
8 |
6 |
4 |
4 |
Three Phase (230 Volt) - Wire
Size Selection Guide* |
HP |
Cable Length |
Up to 30'' |
31'' - 50'' |
51'' - 75'' |
76'' - 100'' |
101'' - 150'' |
1/2 |
14 |
14 |
14 |
14 |
14 |
3/4 |
14 |
14 |
14 |
14 |
14 |
1 |
14 |
14 |
14 |
14 |
14 |
1 1/2 |
14 |
14 |
14 |
14 |
14 |
2 |
14 |
14 |
14 |
14 |
14 |
3 |
14 |
14 |
14 |
14 |
12 |
5 |
14 |
14 |
14 |
12 |
10 |
7 1/2 |
14 |
14 |
12 |
10 |
10 |
10 |
14 |
12 |
12 |
10 |
8 |
15 |
14 |
10 |
10 |
8 |
6 |
20 |
12 |
10 |
8 |
6 |
6 |
25 |
12 |
8 |
8 |
6 |
4 |
Three Phase (460 Volt) - Wire
Size Selection Guide* |
HP |
Cable Length |
Up to 30'' |
31'' - 50'' |
51'' - 75'' |
76'' - 100'' |
101'' - 150'' |
1/2 |
14 |
14 |
14 |
14 |
14 |
3/4 |
14 |
14 |
14 |
14 |
14 |
1 |
14 |
14 |
14 |
14 |
14 |
1 1/2 |
14 |
14 |
14 |
14 |
14 |
2 |
14 |
14 |
14 |
14 |
14 |
3 |
14 |
14 |
14 |
14 |
14 |
5 |
14 |
14 |
14 |
14 |
14 |
7 1/2 |
14 |
14 |
14 |
14 |
14 |
10 |
14 |
14 |
14 |
14 |
12 |
15 |
14 |
14 |
14 |
12 |
12 |
20 |
14 |
14 |
14 |
12 |
10 |
25 |
14 |
14 |
12 |
10 |
10 |
*CAUTION: The infrormation provided in these charts is
for reference only and not intended to provide complete requirements or qualifications
for selecting the proper cable size for various conductor lengths. The requirements
of the National Electric Code (NEC) and any applicable local codes must always
be followed when determining proper wire sizes. Use this information for reference
only.