[Jon Stratis]

The burden of proof is always on the team. That's why we ask teams to bring data sheets for some stuff (like pneumatic components) - they have to prove the specs of whatever we're looking at meeting the rules.

When looking at wire, I can usually tell if a particular wire is the correct gauge. Sometimes, though, I'm not sure and I look for labeling on the wire itself. If the labeling isn't there, then the team will need to provide proof that the wire is the correct gauge - for this, the spool (with some wire still on it) with correct labels would probably suffice. If nothing else, I'll grab a set of wire strippers and strip a short (<1/2") section on a spare piece of wire to make sure it is the correct gauge.

I also always ask the students what gauge the wire is. It's something they should already know and be able to answer, and when they can't it's a teaching moment.