I went digging a bit. It's not simply a slow blow fast blow issue.
It's got to do with how the Brits vs the yanks rated fuses and wiring
systems.
Severely simplified, an American 20A fuse will carry 20+ amps all day
long. A Lucas 20A fuse will blow before getting to 20 amps. This means
an American fuse with the same amperage capacity marked on it (20A for
example) will allow the lbc wiring to burn up.
Some sites give a very lose and rough cross over from Lucas values to
American values as being around 50%. This means a Lucas 35A fuse would
roughly cross over to an American 17.5A fuse. Since 17.5A fuses don't
exist, one goes with a 15 or a 20A.
Here's two links that help clarify this stuff. The first is very
technical, the second is much easier to read, and much less detailed.
http://snic-braaapp.org/itech02.htm#Fuses
http://www.jag-lovers.org/xk-lovers/library/fuses.html
At the risk of muddying the waters, here's a link that supposedly
contains some quotes from the glove box owners manual of a '75 Spitfire.
Unfortunately, you can't tell what is supposedly being quoted or not.
It has a fuse cross over chart, but I've no idea where it comes from.
http://www.triumphspitfire.com/Fuses.html
-----------------------------------------------------
The information contained in this communication may be confidential, is
intended only for the use of the recipient named above, and may be legally
privileged.
If the reader of this message is not the intended recipient, you are hereby
notified that any dissemination, distribution, or copying of this
communication, or any of its contents, is strictly prohibited.
If you have received this communication in error, please re-send this
communication to the sender and delete the original message and any copy of it
from your computer system. Thank you.
-----------------------------------------------------
<<<<GWIASIG 0.07>>>>
/// spitfires@autox.team.net mailing list
/// or try http://www.team.net/cgi-bin/majorcool
/// Archives at http://www.team.net/archive
|