Fuse Confusion Followup
(click to get a 0.5Mb PDF of the appropriate pages)
I’ve done some reading around on this, and happened to find an appropriate section of “Telephony – Volume 1″ by J. Atkinson (Volume 1, Pages 432-433) which describes the alarm fuses I’ve got on my AT&E PAX.
It doesn’t quite marry up with the information I got through the THG mailing list, so I’m not sure what to trust more – I’m inclined to go with the book as it’s probably more reliable than memory – although I may check with the list to see if it’s a known error in the book, or if it was a case of falible memory.
Perhaps I should check my physics textbooks next, perhaps I’ll turn up a formula for calculating the fusible current for a given diameter strand of copper wire…
Nice project
Here is a page with fusing currents for American wires
http://www.interfacebus.com/Copper_Wire_AWG_SIze.html
It’s not linear but in the one to three amp range the fusing current is approxiamately
0.8 * diam (in thousandths of an inch) – 0.8
hth