How long RJ45 extension

[doopydug]

I am going to be getting broadband fitted in my warehouse but, unfortunately, the location of the router is approximately 80m away from the location of the computer.

Is there any limit on how long a cable I can run from the router to the computer?

 

[Armageus]

Up to 100m for a single run, so you should generally be OK.

Interference can play an issue with long lengths though, so be sure to use good quality cable and try and avoid running parallel to power cables etc.