Bend Radius Restrictions for Type MC Cable

Smooth-sheath Type MC cable with an external diameter not greater than 3/4 in. shall have a bending radius not more than _____ times the cable external diameter.

a) five
b) 10
c) 12
d) 15

See answer and applicable Code reference

The correct answer is: b) 10

Article 330 covers the use, installation, and construction specifications of metal-clad cable, Type MC. So as to not to damage this type of cable during installation, bend radius restrictions are outlined in Sec. 330.24. As per 330.24(A)(1), the radius of the inner edge of any bend shall not be less than 10 times the external diameter of the metallic sheath for cable not more than 3/4 in. in external diameter.


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