Bill Stock wrote:

Thanks Mike, I get the V=I*R. Although it's been a good number of years
(decades) since my basic electronics course. It just surprises me that the
amperage specified per foot, would not be for a given voltage. For example:
I tried to test my wire using a variable power supply (3A/35V) a built a
number of years ago. But the wire never did start to glow before the PS
smoked itself. Everything past the regulators got fried. The regulators have
thermal protection and there is a fuse on the mains side, so I guess the
parts (diodes/caps) were underrated. It should not be a big deal to fix
these components. But I'm surprised I did not get some colour out of the
wire at 3A/35V.

400F is pretty dark, as an example - look in your oven set to 450F - it
doesn't glow (visible) red. 35V would have tried to drive lots more than 3A
through the wire - more like 12 if I remember your numbers (in the bit bucket
now) that would fry a 3A supply.

mike