If you are supplying AC Network power to the home over a composite cable that uses twisted pair for the powering voltages, you still have to meet NEC article 830.12(C).
Like our regular DropCheck™ for coaxial cable, DropCheck for Twisted Pair saves you time, money and aggravation. Designed to keep you out of “deep” NEC trouble (as detailed in Section 830.12(c) of the 2002 National Electric Code), DropCheck for Twisted Pair allows for safe application of powering voltages without 18" burial of the cable between the tap and residence.
Why Get Buried in a Mountain of Work? DropCheck installs in minutes and with little more than a pair of pliers. Plus the cost is substantially less than burying a drop cable 18" or 12" deep in conduit. DropCheck can also eliminate customer complaints due to yard damage and inconvenience.

NEC 830.12(c) requires all AC powered telephony drop cables be either: