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The size of wire for service entrance conductors for a 400 amp 3 phase service could be 500 MCM copper. This is very large size wire and difficult to bend and shape, to connect to terminals in the main disconnect and distribution panel. This problem is solved by using parallel conductors or on higher ampacities triple conductors. Using parallel conductors the wire size would be three ought (3/0) copper.

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14y ago
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2w ago

For a single phase 600 amp service, you would typically use 350 kcmil conductors. However, the specific size can depend on factors like voltage drop calculations, distance from the utility transformer, and ambient temperature. It's always recommended to consult with a qualified electrician or electrical engineer for a precise determination.

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15y ago

About 1000 kcmil. However, I'm not aware of any residential panels rated for 600 Amps.

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13y ago

400 kcmil in copper.

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Q: What size service conductors do you need for a single phase 600 amp commercial panel?
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Can the load wires in an electrical service panel exit from the same end as the service cable and meet code?

No, load wires in an electrical service panel should not exit from the same end as the service cable according to electrical codes. Load wires should enter the panel from the sides or bottom to prevent potential contact with live service conductors and ensure proper installation and safety.


How would you extend underground wire to your panel currently aluminum wire run to panel about 300ft I need to extend this to a new shop with a 100 amp panel 50 extra feet?

To extend the underground wire to your new shop, you would need to run a new wire from the existing panel to the new shop location. Ensure you use the appropriate wire size for the distance and amperage load (100 amps) to meet building codes and safety standards. It is recommended to hire a licensed electrician to perform this work to ensure it is done correctly and safely.


What is a service lateral conductor?

A service lateral conductor is a wire or cable that connects a building's electrical service panel to the electrical utility's distribution network. It carries electricity from the utility's distribution lines into the building to power electrical appliances and devices.


What does SN stand for in an old style fuse panel it is referring to the neutral bars?

The term SN refers to a panel or disconnect switch that has solid neutral bar installed. It is a small bar that allows the service conductors to be bonded to the enclosure at that point.


Can a 200A 240V house panel be fed by number 2 conductors from a service entrance meter panel with 200A main breaker?

No, number 2 conductors are not sufficient to carry 200A. You would need larger gauge wires to safely handle that amount of current. It is important to match the wire size to the amperage rating of the panel to prevent overheating and potential hazards.

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What are service panel bus bars?

Typically copper conductors that provide a phase of electricity.


Can the load wires in an electrical service panel exit from the same end as the service cable and meet code?

No, load wires in an electrical service panel should not exit from the same end as the service cable according to electrical codes. Load wires should enter the panel from the sides or bottom to prevent potential contact with live service conductors and ensure proper installation and safety.


How would you extend underground wire to your panel currently aluminum wire run to panel about 300ft I need to extend this to a new shop with a 100 amp panel 50 extra feet?

To extend the underground wire to your new shop, you would need to run a new wire from the existing panel to the new shop location. Ensure you use the appropriate wire size for the distance and amperage load (100 amps) to meet building codes and safety standards. It is recommended to hire a licensed electrician to perform this work to ensure it is done correctly and safely.


How many current carrying conductors can share the same grounding conductor in a single phase panel?

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What is the cable between the service panel and electric meter called?

Whether you have an overhead or underground feed, that section of the installation is referred to as Service Entrance Conductors. On an overhead installation, it includes the conductors on BOTH sides of the meter, from the service drop conductors (attached at the service head) to the service equipment LINE terminals. On an underground installation, it refers only to the conductors between the meter's LOAD side and the service equipment LINE terminals. The conductors on the LINE side of the meter come from a distribution transformer and are unbroken between the transformer and your meter.


How do you know if the single line is single phase or 3 phase?

If the single line is compared to another single line and the voltage that you need is correct then you are looking as a singly phase supply. The electrical classification of single phase is that any two legs of a three phase supply can be called single phase. Look on the nameplate of the distribution panel. There it will state what the panel is, either single phase or three phase. Look at where the distribution enters the building from the utility supply. If there are three insulated conductors (red, black and blue) wrapped around a bare aluminium messenger wire it is a three phase wye connection service. If you see two black insulated conductors wrapped around a bare aluminium messenger it is a single phase service.


What is a service lateral conductor?

A service lateral conductor is a wire or cable that connects a building's electrical service panel to the electrical utility's distribution network. It carries electricity from the utility's distribution lines into the building to power electrical appliances and devices.


How do you check ampere draw?

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What does SN stand for in an old style fuse panel it is referring to the neutral bars?

The term SN refers to a panel or disconnect switch that has solid neutral bar installed. It is a small bar that allows the service conductors to be bonded to the enclosure at that point.


Can a 200A 240V house panel be fed by number 2 conductors from a service entrance meter panel with 200A main breaker?

No, number 2 conductors are not sufficient to carry 200A. You would need larger gauge wires to safely handle that amount of current. It is important to match the wire size to the amperage rating of the panel to prevent overheating and potential hazards.


How do you ground a 100 amp service panel?

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Can a paralleled grounded conductor be a 2?

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