For a distribution panel rated at 400 amps parallel runs of 3/0 conductors will do the job.
A 350 amp service is not a standard service distribution. It jumps from a 200 to a 400 amp rated distribution equipment. The only way to obtain a 350 size service is to install 400 amp equipment and fuse it at 350 amps. The standard size home distributions in North America today are rated at 200 amps. The cost of the service differs through out the continent. Ask your local electrical contractor for an estimate on an electrical upgrade to the required service that you want.
Depends on the size of the sub-panel in that garage. If you are installing a 60 amp sub-panel 400 feet away from the main service panel then use AWG # 4.
Look on the handle end of the main breaker. There should be a number there. That is the amperage of the main breaker. That is the size of your house service.
500 mcm (or 500kcmil) conductors are used for 400 amp 480v single phase or 3 phase systems. The wire AND THE TERMINALS must be rated for 90o Celsius.
It depends on the length of the run
500 mcm
Yes, a main disconnect is required for a 400 amp 3 phase service to disconnect power from the building. It is a safety feature that allows for easy shutdown of the electrical supply during maintenance or emergencies.
The maximum capacity for a 400 amp service is typically 400 amps. This means the service can supply up to 400 amps of electrical current to a building or property. It is important to ensure that the electrical system and components are designed to handle this capacity safely.
Normal home electrical service in most residential areas is provided at 120/240 volts. A 400 amp service would still typically be delivered at this voltage. The 400 amp rating indicates the maximum current capacity that the service can handle.
4 inch rigid conduit
For a distribution panel rated at 400 amps parallel runs of 3/0 conductors will do the job.
You can install a 100 amp sub panel off a 60 amp main panel fed by 100 amp service. This allows for the sub panel to be adequately powered with headroom for future circuits or expansions. It is important to ensure the wire size from the main panel to the sub panel is sufficient to handle the load.
A 350 amp service is not a standard service distribution. It jumps from a 200 to a 400 amp rated distribution equipment. The only way to obtain a 350 size service is to install 400 amp equipment and fuse it at 350 amps. The standard size home distributions in North America today are rated at 200 amps. The cost of the service differs through out the continent. Ask your local electrical contractor for an estimate on an electrical upgrade to the required service that you want.
The required size of the service grounding conductor for a 350 amp parallel service will depend on the specific installation requirements and local codes. It is recommended to consult with a licensed electrician or engineer to determine the proper size based on factors such as the type of wiring used, the distance between the service entrance and the transformer, and the local ground conditions.
Depends on the size of the sub-panel in that garage. If you are installing a 60 amp sub-panel 400 feet away from the main service panel then use AWG # 4.
For a 400 amp residential service, a service disconnect rated for 400 amps is typically required. This could be a main breaker panel with a 400 amp breaker or a separate disconnect switch rated for 400 amps located near the utility meter. It is important to consult with a qualified electrician to ensure the correct type of disconnect is installed according to local building codes and regulations.