Michael Merzenich, Ph.D. is a pioneer in brain plasticity research and the author of more than 150 peer-reviewed articles. He has received numerous awards and prizes, has nearly 100 patents and has been featured in hundreds of books covering topics such as learning, rehabilitation and plasticity.
There shall not be more than the equivilent of four quarter bends (360 degrees total) between pull points, for example, conduit bodies and boxes. ansi/tia/eia-569-b: 8.8.2.2 Bends
Bend the Conduit. A conduit is a metal pipe that houses electrical wires. When wires are tightly wound through a conduit, a grounding wire isn't necessary -- as the conduit itself acts as a ground. Conduit benders will bend the metal of a conduit, or a 90 degree pulling 'L' can be used (image 1). It opens in the back, which creates an access point to pull wires through.