Sorry I should have put a bit more info, it is the wire coming from the elements to the relay. This kiln was a custom build so there is no manufacturer
Sounds like it is the Kevlar wire that I am after, thanks Norm. I am going to try contacting the guy who replaced my relays on Monday but always good to get as much info as possible. Is there any way to tell what gauge the wire is?
Never knew you should bisque the elements before use.
It's call a feeder wire. Take a look at how it's connected to the element. Assuming your kiln is wired up like most kilns- if it's a crimp connection you can't replace the wire without replacing the element since you'll have to cut the end of the element (pigtail) to separate them, and then the pigtail will be too short to hook on a new wire. The other option in this situation is to cut the feeder wire near the element pigtail and splice the new feeder wire onto it. This is not recommended, since that splice will be a weak point that it likely to give out at some point.
On most kilns 10 cubic feet and under, feeder wires are 10 gauge. But since you have a custom kiln, I would verify with the builder. Make no asumptions or it could be a major safety problem.
Did the wire fry out? At either end (element or relay connection)? If it's at the relay end, then the relay is fried and should be replace. If it's just that the insulating sheathing is gone, then you can get just the sheathing and re-cover the wire.