Asked by: Zana Gottwaldhome and garden indoor environmental quality
What is the wire size for 150 amp service?
Last Updated: 23rd July, 2021
|SERVICE ENTRANCE CONDUCTORS SIZE AND RATING|
|Service or Feeder Rating||Copper Conductors||Aluminum or Copper-Clad Aluminum|
|125 Amps||#2 AWG||#1/0 AWG|
|150 Amps||#1 AWG||#2/0 AWG|
|200 Amps||#2/0 AWG||#4/0 AWG|
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Accordingly, what size wire is needed for 125 amp service?
If you have a 125 amp breaker you need 125 amp wire. See the table here. You need to use the 75° column since no one makes a 90° breaker just yet. Since this is a single phase dwelling service you can use #2 AWG copper or 1/0 aluminum for a 125 amp service or main feeder.
Subsequently, question is, what is the wire size for 100 amp service? You need a 3-3-3-5 copper SER cable to carry 100 amps (that's three #3 gauge for the two hot wires and the neutral and a #5 gauge for the ground). If you want to use aluminum, you need at least #2 gauge or perhaps #1.
Simply so, what size wire do I need for a 200 amp service?
So, for a 200-amp service, you would still be allowed to choose a 4/0 AWG aluminum or 2/0 AWG copper, but you would choose it from the 75 degree C column in Table 310.15(B)(16).
What size wire do I need to feed a 100 amp subpanel?
A 100 A sub-panel requires a two-pole 100 A breaker - if you want 100 A. You can use #4 AWG 75 deg C or 90 Deg C copper wire in conduit for a 100 A breaker provided the breaker is labeled for use with 75 deg C wire.