I'm setting up my home alarm (a dsc 1832) using cat5 cables (these were the closest I could find in my country to the specs recommended by the 1832 manual).
I've had to make some splits since the cat5 cables has 8 wires and most sensors only need 4, but joining each wire individually is a bit of a mess.
¿Would using rj45 connectors to join the wires have any drawbacks? I already have the rj45 crimper and tester so I'm hoping that could simplify the installation.
More context: Old house, there was a single pipe we could spare for networking, alarm and doorbell, and given the topology there was no choice but having to join some wires since we couldn't fit more cables in the pipe to run everything end to end. All concrete walls here, getting a new pipe in for cables is very expensive. RJ45 connectors are very very cheap.
Best Answer
"split wiring" is a networking term that is specific to ethernet networking it's not surprising others don't understand what you are doing.
Yes, home running everything even when you leave 2 dead pairs in the cable is the best shot since you never know 10 years from now if you might actually want Ethernet there. And cable is cheap.
Typical RJ45 connectors are rated up to a half amp. You can get specialty ones rated to 1.5 amp. As long as your sensors are not drawing much power you are fine with them. Needless to say the cost of rj45 jacks and plugs exceeds the garbage-grade connectors typically used by alarm wiring companies which is why you don't see them used in alarm work but the worst you could do is almost certainly going to be better than the best that a typical alarm wiring guy does. I've never seen an alarm installation wiring that wasn't an utter mess up inside of the ceiling or anywhere that wasn't immediately visible to the customer.