If you can run it across by stapling it to the rafters you can avoid the insulation thing.
Running wires through your attic.
This is usually a moveable piece of drywall or plywood that covers a rectangular hole in.
As nickblake says run cables on top of ceiling joists but route in a low part of the loft i e.
You simply mount a small plastic clip to every other joist.
Yes this should be corrected and it would be good to have the wiring and all the circuit connections inspected as well.
The attic wiring should be protected and secured to ceiling joists or other wood structural supports.
Raul no this is not a standard practice and is most likely the result of improper installation of electrical attic wiring.
If the attic is inaccessible you have less a worry about protecting the wires than you would if it were a storage area.
Although it s rarely a problem in an accessible basement or attic if your home is built over a crawlspace or has a low narrow attic it can be hard to find the hole you ve drilled in the wall plate.
Find your attic access.
Quickly fishing wires from the attic.
Start by inserting a long wire through the hole you just drilled a disassembled wire coat hanger works well.
Even you are the first time to run security camera cabling you can install your security camera wiring through attics walls for your front back door reception room front back yard shop floor bedroom garage warehouse basement parking lot farm entrance even upstairs etc.
After you窶况e run the wires through the clips you snap a plastic cover over the entire assembly.
Do not drill them through the joists or rafters.
How to run wire through an attic step 1.
The following links will assist you with your electrical question.
Where the cables can t be walked on.