Indoor wiring rarely suffers from this problem, since it is usually a short distance to the circuit breaker panel. This is because of the natural resistance of wires. In these situations, it is necessary to use a larger wire to prevent voltage drop. The distance between a circuit breaker panel and a load will affect the voltage. Copper is still the best choice, but aluminum is not as good as copper. Aluminum wire, on the other hand, is less conductive than copper, and responds more quickly to corrosion and heat. Copper wires are also more susceptible to heat than aluminum, so it is not recommended for outdoor applications. Likewise, the size of an aluminum wire depends on the ampacity and service type.Ĭopper wire is a good choice for an underground installation because it is highly conductive and durable, but is prone to corrosion. Copper wire gauge #3/0 should be used for an underground installation to ensure adequate lightning protection. A 200 amp service underground typically requires a 2/0 AWG copper wire, although other gauges may be required for a different installation. The gauge of a wire will vary depending on the amperage and voltage that the electrical service must carry. Additionally, aluminum wire can cause fire hazards. ![]() Aluminum wires are typically 2 American wire gage to prevent corroding and loosening over time. It does not conduct electricity the same way as copper, and it responds to heat and corrosion more quickly than copper. On the other hand, aluminum has many disadvantages. You should always contact an electrician for help if you’re unsure of what size wire you need.Ĭopper is a great choice for electrical wiring because it is durable and doesn’t lose voltage over long distances. The wrong wire size can result in serious issues and damages. You should also check your local building codes and obtain any permits required. This is determined by the National Electrical Code (NEC), which may change from time to time. What size wire do I need for a 200 amp service?īefore installing a 200 amp underground service, you should know the proper size of wire for the job. Lastly, use a torpedo level to ensure that the meter socket is level. If you can’t find a trained professional, you can also try to use a cordless drill to expand the existing wire hole in your ceiling or edge joist, and then attach the 200-amp SE wire to the new socket. A trained professional will be able to assess the wiring’s condition and suggest the right size for your needs. They will have an underground electrical panel that allows you to check the voltage. If you are unsure of the size of your existing cable, call your electric utility. Copper wire is the standard for a 200-amp service underground, but it can be more expensive if you want a more expensive cable. Aluminum wire is also susceptible to corrosion and can loosen over time, posing a fire hazard. Copper wire is 4 AA wire gage, but it is often cheaper to use aluminum. Aluminum wire is a good choice for 200-amp service underground, but you should be careful not to use it around other conductors.Ĭopper is a popular material for wiring, as it is both durable and conducts electricity well. Aluminum wire is a common choice, but you should also consider copper and steel armored wire. You want the right amount of power for all of your house’s electronics. When installing a 200-amp service underground, it is crucial that you select the correct wire size for the job. What size wire for 200 amp service underground
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