Medium voltage cable bending radius

[Shockedby277v]

I am trying to find a bending radius requirement for MV cable that is tray cable rated. I dont see anything for bending radius in article 328 type MV cable but do see requirements for bending radius under article 336 tray cable. 328 doesn’t send me to 336 for bending radius requirements.

 

[petersonra]

Look in manufacturers instructions.

 

[ron]

NEC 2023
305.5 Conductor Bending Radius.
The conductor shall not be bent to a radius less than 8 times the overall diameter for nonshielded conductors or 12 times the overall diameter for shielded or lead-covered conductors during or after installation multiconductor or multiplexed single-conductor cables having individually shielded conductors, the minimum bending radius shall be 12 times the diameter of the individually shielded conductors or 7 times the diameter, whichever is greater.

 

[zbang]

Code section 305.5 gives a code minimum, but if the manufacturer's instructions give a larger radius, then our good friend 110.3(B) says to use that.