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The minimum size you can use is 3/4 conduit. The code allows for a maximum of 4 each # 6 gauge wires in a 3/4 inch pipe. You'll likely be running 3 ea # 6s, two hots and the neutral and a #10 ground wire.
PVC is cheaper but is used differently. PVC is usually baried in ground and emt usually runs exposed. You can use PVC exposed if it is schedule 80 gray PVC electrical conduit. Schedule 40 is for under ground
There has to be a pull box between every four quarter bends in a conduit run.
Code states no more that 4 - 90 degree bends in a conduit run between pull boxes.
The NEC allows 26.
This is one of those questions that has a lot of answers! In a residence I would want it as short as possible, however you can legally run it 10 feet, if you use steel flex or metallic liquid tite in your raceway system the maximum length of the flex can only be 6 feet with the remaining 4 feet of conduit. Inspectors in some areas like for the service panel located in the first stud bay available nearest the service entrance, this usually keeps the conduit and wire length to a minimum.
PVC conduit is recommended for underground installations. Just remember that a ground wire equal to the maximum load current of the device connected at the other end has to be installed. This ground wire is not counted in conduit fill calculations. It has to have a green insulation in colour and be of a continuous length.
is it permitted to use flexible metal conduit over 6 ft in length as a grounding means
its 180 degrees If you use the above answer the conduit will flatten and close off. The maximum degrees for a single bend in conduit is 90 degrees. Also code only allows four 90 degree bends in a conduit run between pull boxes.
Sears Point Raceway
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
There is maximum length to an answer. One sentance would be best. Two, at most.
Adding an extra length of shaft on the existing shaft to take extra pulleys will put an extra load on the bearings supporting the shaft. In the long term this would shorten the life of the bearings. The makers might be able to supply more information like the side-load specification for the bearings. If in doubt support the outer end of the shaft.
For use in networks the maximum segment length would be 500 meters
There are two things here to keep in mind. If you are trying to add more conductors to an existing conduit run use the cross sectional area of the conduit to see if more wires can be fitted. The second thing that's relates to length is the voltage drop at the load. To size the conduit work backwards from the load amperage to size the wires. If a long distance is involved a voltage drop calculation will be needed. Then select the conduit size to accommodate the wires recommended for that load amperage. The length of conduit run is not brought into the equation on de rating wire size it is always about keeping the voltage up at the load end of the run by increasing the wire size and selecting the proper conduit size for that wire.
maximum case length 2.039". so it will depend on the bullet you use for total length.
Yes the stated length is maximum so if it says 3" you can also use 2.5 and 2"