Reusing cable for diy?

No problem.
Usually industrial stuff is made to really last a long time.
The only possible issue might be the insulation decaying.
When you cut the wire, just see if the inner insulation is still strong and flexible. If it is cracked, or splits off the wires, discard the cable.

Thanks for the reply, Elizabeth. Everything is still in good shape that way. When I pull the trigger on a new cord, I'll store this one for those projects.

Poprhetor , I would not waste the time with that cable.

Just not up to snuff?

Stuff? well if you expect 'audiophile' quality powercords out of it. Since stuff Like "acrolink' power cable sells for $170. per meter for the raw wire, and the connectors to go with it are in the hundred buck range, or neotech NEP1001 at $1000. per meter for the bare wire.. i think your reuse of an old wire is not in the same catagory as the 'audiophile' one.
Then you can buy decent complete powercords in the under $100. range which are good, but the audiophile snob may stick up his/her nose at them too

If YOU feel comfortable using the wire, then use it.
I bought some MilSpec Teflon insulated 12 gauge wire off eBay and use it for stuff. It is not 'Audiophile Approved', But i can live with my choices.