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Any more than four 90 degree bents (equaling up to 360 degrees) or a combination of other bends will make it quite difficult to pull the wires into that pipe. This is why the electrical code prohibits more than 360 degrees. If you have to put more bends than that, place a junction box on the line after the first 360 degrees. This way you pull to the junction box and then use that junction box so continue the rest of the way.
4 quarter bend
There has to be a pull box between every four quarter bends in a conduit run.
The 'Stub-up', or 90º bend, Back to Back Bends, Three Bend Saddles, and offset bends.
Code states no more that 4 - 90 degree bends in a conduit run between pull boxes.