CMDR Steve-O wrote:
I can see just in case to keep them at 50' lengths, as 100' is kinda long.
The thing is though that 100" cable is going to be running 100" whether its one continuous cable, or multiple segments. I can see him wanting to do this in case there's an issue with a damage cable and only needing to replace a small segment rather than the whole thing (as mentioned before) but if he's worried about the length I would think he'd want it sections so he could put in a box that repeats the signal at some point but he didn't seem to mention that to you.
If it was me though I would follow what he says and keep a copy of his e-mail if you can. Its better not to rock the boat too much unless it's more important but also keep something to cover you "ace" in case someone else questions it.