what cables are you touching in the network interface device?
for the copper conductors, you already know.
If you also working the fiber, then in what way?
To handle fiber, watch bend radius. the industry standard for fiber (including jacket) is 10x.
1/8x10= 1 1/4'' Radius.,,,, =2 1/2'' diameter.
What this means is your fiber cant experience any bend or loop smaller than 2 1/2''. Imagine wrapping the fiber around a pipe that is 2 1/2'' in diamter.
Tips on the fiber,,- leave the factory cap on the ends and make it the last thing that is connected.
If your running inside fiber , learn your color code on the fiber.
If your responsible for DB loss on the fiber you supply inside, buy the hand held tool and log in the DB loss on each. A bend radius too small will allow the light to leave the conductor and pass through the jacket and out to the air.
You dont have to worry about interferance with fiber being near or around conventional wiring except for one thing recently discovered while I did a tour with Mantech iin Iraq and is pretty much NA for this topic.