Choosing the right size wires for your below panel is a matter of safety. It different for number of reasons, however you typically need 1 AWG copper wire for a 100 amp below panel. Whether it be copper or aluminum, let’s take a look at what dimension wire you require for a 100 amp below panel that’s 200 feet away.


Table of Contents

Wrapping it Up

Safety Precautions

When performing electrical work in her home, safety should always be your height priority. Installing wires that room too tiny to take care of their tons safely can reason overheating, potentially resulting in a fire. Once it comes to larger currently that bring 100 amps, an easy mistakes can become deadly.

You are watching: Wire size for 100 amp service 150 feet

Before girlfriend do any type of electrical work, make sure that you are choosing the exactly gauge wire. This, along with other safety and security precautions, will substantially reduce your threat of injury, damage, or even death. once you room performing electric work, especially on a company panel, you should constantly turn off the power higher up the line. In some cases, you might need to contact in your utility agency to shut off the power for you, at the hookups.

Also, if you selected to perform the electric work yourself, you will do it still have to schedule an investigate by a certified electrician. This will certainly ensure that the occupational was completed correctly, safely, and complies through code.

Size of the Wire/Conductors

Generally speaking, you should have the ability to use 1 AWG aluminum or 3 AWG copper for 100 ampere circuits. Power quality can be influenced depending ~ above what girlfriend choose, so make certain to boost your conductor dimension to prevent or reduce any kind of potential voltage drop.

You will commonly want to reduce your voltage drop to somewhere about 3% or less of the supply voltage. So, because that example, if you have actually a 240 volt supply, you want the voltage autumn the it is in 7.2 volts or less to prevent power top quality issues.

How electric Wires room Sized

If you’ve ever before had come shop for electrical wire, you’ve likely seen that there is a wide variety of sizes and types to pick from. Although different species of wire space for different uses, understanding the proper wire size, or gauge, is the crucial to make the exactly choice.

The hatchet “gauge” is provided to describe the physical size of the wire. Sized by the American wire Gauge (AWG) system, wires are offered a numerical designation the is the opposite of their diameter. This way that the larger diameter, the smaller wire gauge number you’ll have. The most typical sizes space 2-, 6-, 8-, 10-, 12-, and 14-gauge wire.

A wire’s size is what determines just how much current it have the right to safely handle. Measure up in ampacity, electrical current has a maximum because that each cable gauge. This means that, depending on the size of the wire, you’re going come a have actually a different maximum safe carrying capacity.

The bigger the Better

When you trying to size your electric wiring, it mostly depends on length. Because electrical wires have resistance, they i eat lot current. The much longer the wire, the much more resistance as result of the fact that they need to draw much more power indigenous the resource to reach the outlets. Therefore, if you have to run wiring for her 100-amp below panel much longer than 20 feet, girlfriend should take into consideration using a 1-gauge wire.

With that being said, if girlfriend ever uncover yourself stuck between two different gauge sizes, larger is better. If you end up using too huge of a gauge, you will certainly just have actually spent an ext money 보다 you most likely needed come spend. However, if your wire gauge is also small, you will certainly have poor performing circuits and also you location yourself at a severe risk for electric fire.

What is an electrical Subpanel?

Perhaps you room just acquiring started and aren’t quite familiar with the procedure and why it is necessary. A subpanel is the an additional circuit breaker panel and it feeds turn off of her main electric panel. There space two reasons for the installation.

The first is that key breaker panel is completely full, allowing no room for any type of potential extr circuits. The second is therefore the subpanel is there to put a control suggest for circuits all in a location that is close to the area the they serve.

How the Subpanel Works

For newer homes, you will sometimes see a pair of main subpanels. This each attract their power from the key utility. Store in mind that you will view this in houses that have either 300-amp or 400-amp service. This will mean either a 200/100 amp separation or a 200/200-amp split.

In most cases, though, an really subpanel is dashboard breaker of smaller circuit the has all over from 4 slot all the way up to 12. Those slots space fed indigenous the circuit breaker (240 volts) right into the key breaker or the feeder breaker.

The subpanel is actually just a smaller version of your key panel. It has the same hot bus bars and ground and neutral bus bars. The distinction is that the subpanel doesn’t have a main shutoff circuit breaker. This is because of the fact that the feeder breaker back in your main panel offers this functionality.

How the Subpanel is Connected

When electricians go through the environment of a subpanel, the process usually requires running a feeder cable an initial starting native the main panel and also going to the subpanel. A three-wire cable is generally involved, through a bare copper ground cable in enhancement to three insulated conductors.

The electrician will then attach the hot wires to run from the feeder cable come the warm bus bars via the lugs in the subpanel. They will likewise connect the neutral wire to the linked bus bar, and also the bare grounding copper cable to the bus bar associated to grounding.

Hot Feeder Wires

At this suggest in the process, the electrician will connect those warm feeder wires approximately the brand-new 240-volt breaker. ~ that, they will affix the ground and neutral wires indigenous the feeder cable come their connected bus bars that are situated in the key panel.

The last step is come snap the feeder breaker into one of the open dual slots ago on the main service panel. After all that, the subpanel will certainly be all set to take it on individual circuit breakers for any extr circuits that should be installed.

Keep in Mind

There are a couple of things to store in mind prior to going v this process. The very first is that you want to feel her panel using 4 conductors. These are your two warm conductors, the neutral, and also the ground. Make certain that you isolation the neutral or base conductors and also the bus bar situated in the an additional panel.

Lastly, make certain that you have installed a suitable grounding electrode system. Friend will perform this at the outbuilding, and also you will bond your grounding connector come this electrode system. For any questions, be sure to call a professional. Taking care of electricity have the right to be dangerous, to say the least.

Potential capacity Issues

Generally speaking, you could run throughout one of 2 capacity worries whenever you are installing your subpanel. The subpanel has to have the suitable amperage volume for her area as well as the variety of circuits the it will wind up serving.

Secondly, your main company should be sized in together a way that it can sufficiently supply strength for the additional demand that will be lugged on by the subpanel. There is a method provided by the National electric Code for accurately calculating wattage load and load demands for your subpanel.

Older key Service

In the occasion that you have actually an older key service, miscellaneous of the 60-amp or 100-amp variety, you might need to update to something along the lines of 150-amps or 200-amps if you want to have adequate power gave to a newly mounted subpanel.

If you suppose the subpanel come be offering circuits come something choose a kitchen remodel with new additional circuits, a room addition, or a brand-new workshop, this is specifically true. The inverse need to be fine, yet (installing a 60-amp come 100-amp service with a 200- or 300-amp service already in place.

See more: Watch Prison Break Season 3 Episode 1 Watch Online, Prison Break Season 3 Episode 1

Calling an Electrician

Should you feeling uncomfortable with the limitations or installation the subpanel, phone call an electrician is always a clever option. These are experience experts that have done this kind of thing many times over. They will certainly ensure the the job is done safely and also properly, conserving you potential headaches.