Asked by: Zana Gottwald
home and garden indoor environmental quality

What is the wire size for 150 amp service?

Last Updated: 23rd July, 2021

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.

Related Question Answers

Tudorina Schmeink


How many breakers can be on a 150 amp panel?

Panels have half as many stabs as total breaker slots, so a panel with forty slots has twenty stabs, and a typical 150-amp rated panel requires that the sum of the amperages of both the breakers on one bus bar finger not exceed 200 amps.

Chaker Mahalingam


How many amps can go in a 100 amp panel?

The amperage is the maximum you can use at any one time. Your main panel may be 100 amps, and everything in the house totals up to 200 amps, but you may only be using 50 amps at any one time!

Edelina Pochkunov


Adan Ralphs


Does sub panel wire need to be in conduit?

Re: Subpanel wire run
Individual THHN conductors must be run in conduit--either metallic or non-metallic, flexible or rigid. You could probably use SER instead, as long as it's sheathed and contains four conductors: one for Leg A, Leg B, neutral, and ground.

Xian Cannistra


What size wire do I need for a 225 amp service?

With 4 - 4/0s and 4 AWG (the required EGC for 225 amp feeder) you will be just a touch over.

Maftei Montehermoso


Is 125 amp service enough?

For a small cabin, 125A is probably fine for a small cabin with a "normal" amount of electric consumption. - You will not have enough for a normal tankless water heater. Usually a 200A service is minimum required, but you may need more if you have AC, electric heat, etc.

Merçe Finkelson


Does service entrance cable need to be in conduit?

(1) Service-Entrance Cables.
So, you'll either need to have this service-entrance re-run with a conduit, or see if you can get your local electrical inspectors to sign off on using bollards (i.e. concrete-filled metal poles) to protect the meter pan and service cabling as Machavity suggests.

Colon Julvez


How much does it cost to change from 100 amp to 200 amp?

The average cost to replace an electrical panel is $850 to $1,100 for 100 amps, or $1,200 to $1,600 is a new service panel is needed. To upgrade to 200 amps, expect to spend $1,300 to $2,500, or $2,000 to $4,000 to upgrade to 400 amps. A low-amp subpanel costs $500 to $1,000.

Haizhen Rabinowitz


How many amps can you put on a 200 amp panel?

Slightly newer homes (built before 1960) may have 60-amp service. In many homes built after 1960 (or upgraded older homes), 100 amps is the standard service size. But in large, newer homes, 200-amp service is now as a minimum, and at the very top end, you may see 400-amp electrical service installed.

Cori Boedecker


How much does 200 amp wire cost?

Here's a breakdown of average cost ranges of break boxes by amperage. 100-amp - $50 to $100. 200-amp - $100 to $200.

Jeanelle Sotil


What is 3 0 wire rated?

AWG Kcil
3-Wire residential services, allowable ampacities
Copper AWG Aluminum AWG Service Ampacity
3 1 110
2 1/0 125
1 2/0 150

Genaro Lancaster


What is service entrance cable?

The definition of service-entrance cable in 338.2 is “a single conductor or a multiconductor assembly provided with or without an overall covering, primarily used for services.” Type USE cable, containing two or more conductors, is permitted to have one conductor that is uninsulated.

Nerissa Ces


How far can I run 10 gauge wire?

1 conductors per phase utilizing a #10 Copper conductor will limit the voltage drop to 2.63% or less when supplying 12.5 amps for 120 feet on a 120 volt system. Ten gauge wire has 1.2 ohms per 1000 feet or about 0.3 ohms for 240 feet round trip.

Mateusz Dorfschmidt


How far can you run 12 gauge wire?

A 12 gauge wire is typically good for 15 amp at 100 feet.

Dieudonne Zenteno


How do I calculate cable load size?

Divide the voltage running through the cable by your target current. If, for instance, 120 volts will act on the cable, and you want 30 amps to run through it: 120 / 30 = 4. This is your target resistance, measured in ohms. Multiply the cable's length by its material's resistivity.

America Bing


What size aluminum wire do I need for 100 amp service?

Use 3 AWG copper or 1 AWG aluminium for the current carrying conductors.

Yueping Ritterspacher


What size breaker do I need for a 100 amp subpanel?

You can use the 100 amp panel off a 60 amp breaker if you determine that it is adequate, but I would suggest that in sizing your feeder wires and conduit it would be a good idea to size them to accomodate 100 amps. Your feeder wires are where most of the work for this project will be.

Cleto Navarrete


What size wire do you use for a 200 amp service?

Main Breaker Required Size Ground Wire 6. Use a 100-amp main for a 100-amp service and a 200-amp main for a 200-amp service in the switch box. 7. Ground wire must be #6 bare copper (100 amp) and #4 bare copper (200 amp) and will be connected into disconnect and run down the building to the finished ground line.