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Look at the value of the breaker or fuses that control your main electric panel.

look at the wire size coming in to the main lugs on service panel, I am assuming you don't have a main breaker or you would look at the breaker rating to determine service size. 2/0 copper or 4/0 aluminum service size 200 amps, #4 copper or # 2 aluminum 100 amp.

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โˆ™ 2012-02-06 04:03:38
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Q: How do you determine if you have 100 or 200 amp service?
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Can you install 100 amp service in 200 amp meter base?

No, each size service needs its own meter base.


What is 200 amp service in USA?

200 amp service is the rating of electrical power available to your home. Older homes only had 60 amp service. Newer homes were updated to 100 or 150 amp service. The standard for most US homes today is 200 amp. You can find out what your service is by looking at the top breaker in your electrical box, it should be stamped on that.


Can you tap off of a 200 amp service for 2 100 amp panels?

Yes, but at every reduction in wire size there has to be a breaker sized to the smaller wire size. The wire size for 100 amp panels is recommended at #3 copper conductor. From the 200 amp feeder panel you will require a 100 amp two pole breaker for each of the two 100 amp services. Keep in mind that if you run the 100 amp services close to maximum this will take away the capacity of the 200 amp service for other branch circuits coming off of it. Also keep in mind that if the panels are located, not in the same building as the 200 amp service that the 100 amp panels will be treated as separate services and will have to be constructed like a 100 amp service. This includes ground rods. Also the bonding screw will have to be removed that connects the neutral buss to the panel enclosure.


Can you install a 200 amp panel on a 100 amp service?

No. you cant because that is way too much current (amperage). Think of a circuit. You should NEVER connect a 100 amp service to a 200 amp breaker, as you might do with the 200 amp mains in the panel you have. However, if your service conductors are long enough or can be extended, you can connect your service conductors to a 100 amp breaker installed as you would any other breaker in the panel. You would simply ignore the 200 amp main breaker. You might end up with an inspection problem if at some time that becomes necessary. And you might have to make it right for the sale of a property. But electrically, if you connect your service to a 100 amp breaker, "the electrons don't care," as I like to say it. But you only have 100 amps available.


Can you feed 200 amps to 100 amp panel?

The rating of a panel dictates the maximum current of the panel and is protected by a breaker of that rating. If you had 200 amp service to your house and only had a 100 amp panel then you could only draw 100 amps before the breaker tripped.

Related questions

What is the difference between 100 amp service and 200 amp service?

The difference is 100 amps


Can I use a 100 amp main panel as a sub panel for a 200 amp service?

No


Can you install 100 amp service in 200 amp meter base?

No, each size service needs its own meter base.


What is 200 amp service in USA?

200 amp service is the rating of electrical power available to your home. Older homes only had 60 amp service. Newer homes were updated to 100 or 150 amp service. The standard for most US homes today is 200 amp. You can find out what your service is by looking at the top breaker in your electrical box, it should be stamped on that.


Can you tap off of a 200 amp service for 2 100 amp panels?

Yes, but at every reduction in wire size there has to be a breaker sized to the smaller wire size. The wire size for 100 amp panels is recommended at #3 copper conductor. From the 200 amp feeder panel you will require a 100 amp two pole breaker for each of the two 100 amp services. Keep in mind that if you run the 100 amp services close to maximum this will take away the capacity of the 200 amp service for other branch circuits coming off of it. Also keep in mind that if the panels are located, not in the same building as the 200 amp service that the 100 amp panels will be treated as separate services and will have to be constructed like a 100 amp service. This includes ground rods. Also the bonding screw will have to be removed that connects the neutral buss to the panel enclosure.


Can you install a 200 amp panel on a 100 amp service?

No. you cant because that is way too much current (amperage). Think of a circuit. You should NEVER connect a 100 amp service to a 200 amp breaker, as you might do with the 200 amp mains in the panel you have. However, if your service conductors are long enough or can be extended, you can connect your service conductors to a 100 amp breaker installed as you would any other breaker in the panel. You would simply ignore the 200 amp main breaker. You might end up with an inspection problem if at some time that becomes necessary. And you might have to make it right for the sale of a property. But electrically, if you connect your service to a 100 amp breaker, "the electrons don't care," as I like to say it. But you only have 100 amps available.


Do you need to change the wire size going from 100 amp service to 150 amp service?

Yes, the wire size has to be increased. The existing 100 amp service will now probably have a #3 conductor with an insulation factor of 75 or 90 degrees C which is rated for 100 and 105 amps respectively. Increasing to a 150 amp service will use a #1/0 wire size. If you are thinking of an upgrade, skip the 150 amp service and go to a 200 amp panel. New homes are installing 200 amp 42 circuit panels. The extra cost is only reflected in the materials as the labour costs will be the same regardless whether a 150 amp or a 200 amp panel is installed. The wire size for a 200 amp panel is #3/0. With an insulation factor of 75 or 90 degrees C the rating is 200 or 210 amps respectively.


What gauge wire for service entrance in Wisconsin?

Depends on the size of the service. 100 amp service will require 3 gauge, 150 amp service will require 1/0 gauge, and 200 amp service will require 3/0 gauge.


Can you feed 200 amps to 100 amp panel?

The rating of a panel dictates the maximum current of the panel and is protected by a breaker of that rating. If you had 200 amp service to your house and only had a 100 amp panel then you could only draw 100 amps before the breaker tripped.


Can you install a 200 amp breaker on 100 amp wire to a 100 amp service breaker?

No, the breaker must have a rating of 125% of the wire rating, no more than that, so that's 125 amps.


Who makes a main breaker 200 amp service that has built in 200 amp gfci?

NOBODY!


What size aluminum wire for 100 amp service?

2 AWG Aluminum for 100 Amp Service.

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