What size wire is needed for 125 amps?
What size wire is needed for 125 amps?
| SERVICE ENTRANCE CONDUCTORS SIZE AND RATING | ||
|---|---|---|
| Service or Feeder Rating | Copper Conductors | Aluminum or Copper-Clad Aluminum |
| 100 Amps | #4 AWG | #2 AWG |
| 125 Amps | #2 AWG | #1/0 AWG |
| 150 Amps | #1 AWG | #2/0 AWG |
What size wire should I use for a sub panel?
The cable must have a wire gauge sufficient to the amperage of the subpanel—a 100-amp subpanel requires #4 copper wires or, more commonly, #2 aluminum wires, for example. (Aluminum is often used for feeder cables because the cost is typically much lower than that of copper wires.)
What size breaker Do I need to feed a 100 amp subpanel?
You can feed a 100 amp panel with a 60 amp breaker, theres no problem there. Running smaller wire will save you quite a bit. Yes you will need 4 wires, and you can use 3#6 thhn and a ground which could be #8.
What size wire do I need for a 60 amp subpanel?
4-gauge wire
While it’s common to use a 6-gauge wire for 60-amp breakers in practice, it’s best to use a 4-gauge wire if you’re installing a 60-amp subpanel.
Can you run a 100 amp sub panel off a 100 amp panel?
To the best of my understanding, there is no code issue running a 100A subpanel off a 100A main panel, so long as the wire size is correct, and the installation is correct. For a subpanel, you need four wire service (two hots, a neutral, and an equipment ground).
How much wire do I need for a 125 amp sub panel?
Proper wire gauge recommendation for installation of 125 amp sub panel. The sub panel will be located one floor below the 200 amp main panel and need about 14 feet of wire for a neat installation. Should I use #3 or # 2 copper?
How big of wire do I need for a 100A aluminum feeder?
No home inspector is ever going to blink an eye at a 100A aluminum feeder. Aluminum is a very lightweight material, almost 1/4 the weight of copper, with fewer atoms spaced farther apart. Atoms are what carry electricity, so the wires need to be physically larger (by 2 numerical wire sizes).
What’s the wire size for a 100A subpanel?
Given that you are at 100A, you just pull it out of NEC Table 310.15 (B) (16). Use the 75 degree C column, unless you have a cable type which mandates use of the 60 degree C column. And, you round up to the next available breaker size. That means usually: 100A is #3 copper ($600/100ft) or #1 aluminum ($175/100ft).
How big of a breaker do I need for a subpanel?
For example, if the load calculation comes out to 48 amps, you should use a 50-amp breaker to protect the circuit. Feeder circuits supplying subpanels are 240-volt and require a double-pole circuit breaker. Click to see full answer. Then, what size wire do I need for a 60 amp subpanel?
