The right way to cut a cable connector depends on what type of duct you are talking about. The tool that you use for cutting should be suitable for the size and material of the duct. For small PVC ducts, it is common for people to use pliers. But pliers don’t work if it is large. In that case, you will have to use a hacksaw. In fact, a hack saw works for many different types of ducts. Even though it takes a bit of time and effort to cut a metal conduit with a hacksaw, it is still doable. You can use an electric cutter if you want to get the job done faster.