they are marked by size, and, they should be four sizes smaller than the wire they are protecting

http://www.madelectrical.com/catalog/fusible-link.shtml

http://minimopar.knizefamily.net/electrical-links.html

Some times I see two sizes smaller suggested, but, normally, it is four

Last edited by Strawdawg; 11/09/11 12:31 AM.

Steve