The required size of a conduit raceway for a 3-5000 mcm wire is 300 kcmil. It maximizes the limits on the wire fill for raceways.
300 kcmil @ 75°
You can pull 10 #3 gauge wires in a 2 1/2" conduit.
The key parameter in sizing wire is the current requirement. Once you know that you can look up value in a wire gauge table. The length of the run is important for longer runs because of the resistance of the wire itself. Aluminum wire requires a larger diameter than copper for the same current. Once you calculate the wire size you can then size the conduit.
For a distribution panel rated at 400 amps parallel runs of 3/0 conductors will do the job.
The required size of a conduit raceway for a 3-5000 mcm wire is 300 kcmil. It maximizes the limits on the wire fill for raceways.
300 kcmil @ 75°
A 1600 amp service typically requires 500 kcmil copper wire or 750 kcmil aluminum wire. It's important to consult with a qualified electrician to determine the exact size and type of wire needed for your specific installation to ensure safety and compliance with local electrical codes.
You can pull 10 #3 gauge wires in a 2 1/2" conduit.
No, a reducing bushing does not make wire pulling easier. It is used to adapt the size of a conduit opening to accommodate a smaller size conductor or conduit. Proper lubrication, good planning, and the right tools are more effective for making wire pulling easier.
Couple of things wrong here. 30 isn't a wire size. If you mean a wire that can carry 30 amps that would be # 10. Now it depends on how many # 10 wires you want to put into a conduit that governs the size of the conduit.
The key parameter in sizing wire is the current requirement. Once you know that you can look up value in a wire gauge table. The length of the run is important for longer runs because of the resistance of the wire itself. Aluminum wire requires a larger diameter than copper for the same current. Once you calculate the wire size you can then size the conduit.
For a distribution panel rated at 400 amps parallel runs of 3/0 conductors will do the job.
Need to know the wire # size to compute wire fill in conduits
The AC resistance of a 1000 kcmil aluminum wire over 500 ft will depend on the resistivity of aluminum, which is approximately 2.82 x 10^-8 ohm*m. The resistance can be calculated using the formula R = ρ * L / A, where ρ is the resistivity, L is the length, and A is the cross-sectional area of the wire. The presence of the steel conduit may affect the overall resistance, but specific information on the conduit material and dimensions would be needed for a more accurate calculation.
No. The new electrical code change does not allow any flexible conduit to be used as a ground means. It is now required to have a green ground wire pulled into the conduit with the other conductors in the flexible conduit. This grounded bonding conductor is not counted as wire fill when calculating the size of the flexible conduit to use
The sizing of conduit systems that wire has to be pulled into is dependant on the physical size of the conductor being drawn into the conduit. The second governing factor is the conductor count of the specific conductor that is needed. A 500 MCM copper conductor with an insulation factor of 90 degrees C is rated at 430 amps. This is where the conductor count is need by the service, as to whether the service is single or three phase. In this specific case, the electrical code will allow both single and three phase installations to use the same size conduit. A maximum total of four 500 MCM conductors can be drawn into a 78 mm diameter conduit.