One of the lab techs where I went to university had a poster up in the workshop with a series of nails and the current required to melt them. At the end of the

One of the lab techs where I went to university had a poster up in the workshop with a series of nails and the current required to melt them. At the end of the series was a thick bolt, marked "1100 Amp Slow-Blow Fuse"...