Only one way ; The NEC way.
When installing a pro-grade security system you should always follow the local and federal laws governing the installation of low voltage wiring . In this instance we are discussing the usage of Electrical Metallic Tubing ( EMT) . According to the NEC EMT raceway can be used on circuit wiring rated 600 V or less. There are a few other factors you have to consider when using EMT and other raceways. One of them is the full rate a conduit should not be filled more than 40 % of its size. There is also a fill rate chart on the NEC code book that tells you how many wires you could run through a particular size EMT or other raceways below is an example using category 6e wire and a three-quarter inch EMT.
According to the 2017 NEC code a 3/4 inch EMT can have a maximum of 14 22 gauge wires going through it. If we calculate the diameter of cat 6e with and without the spline divider it is equivalent to a maximum of 2 cat-6e with spline divider wires thru the 3/4 ” EMT and 3 cat-6e wires without the divider. Even though more wires fit thru this conduit with ease you will not pass an inspection if the inspector see the conduit has been filled more than 40 %.
Remember these rules are here for a reason not just for the job to cost you more money. No inspector will ever say to an installer the NEC is wrong. At least he or she should not. Follow the rules and all your jobs and inspections should always pass without any issues.
On another note when installing security cameras and many other accessories make sure that they are UL listed because some municipalities require to see the documents and the stamps on the equipment as well as the wiring. It would be terrible to have to re-wire an entire project because you purchased a wire or equipment that had no UL listing not to mention that after all work is done the wire does not perform as promised.
