78 Spider; 85 Sprint QV
Earthing / bonding cables are often used in petroleum fuelling systems ( big and small) to equalise electrical potential. If all components in an fuel handling system have the same electrical potential, then there is no possibility of static electricity being generated to the point that a spark can be produced. (we all know that static electricity generates high voltages and produces sparks right?)Can anyone explain why its needed?
Sparks from static are very bad when a fuel air mixture is present. (such as in a carburettor).
All fuels moving through fuel lines generate static and this static needs to be managed. Static is a VERY big problem at refineries and in aircraft fuel systems.
I've seen lots of photos of alfa engine fires. I would strongly suspect the little carb earthing strap was either removed or not working as designed and caused many of these fires.