AC and MC Cable: Understanding the Difference Chuck Ross
Armored cable (Type AC) and metal-clad cable (Type MC) can look very
similar, as they both feature flexible metal armor encasing a number of
pre-installed conductors. And both types of product can enable much
faster installation, versus old-school pipe-and-wire methods. However,
AC and MC cable actually are constructed differently from each other,
which leads to differences in their permitted applications.