What's the longest (maximum length) CAT 5 patch or crossover cable I can use without signal loss?

Axis Network Cabling

Question: What's the longest (maximum length) CAT 5 patch or crossover cable I can use without signal loss?

Answer: The maximum length (maximum certifiable length) for CAT 5 patch or crossover cables is 328 feet (100 meters).

Beyond that, you run the risk of signal loss and other complications.