[Elecraft] Connecting Transceivers in Vehicles - Change ofRecommended Practice - OT

[Paul Christensen]

> This becomes a problem ONLY when the radio is connected to the negative 
> terminal of the
> battery. In that case, you should use the negative fuse...

But consider that case where a rig is powered through a pair of fuses 
home-run to the battery posts.  If the negative  fuse blows and the positive 
fuse remains closed -- and *if* the radio chassis is common to negative 
power with grounded connectors (e.g., SO-239) via a ground return through 
the vehicle chassis, then the coax braid and other supplemental grounded 
leads on the radio chassis will carry the full rig current.

Seems like in all cases where the rig chassis is common to the negative 
power lead, the negative lead wiring should go un-fused at or very close to 
the negative battery post.

Paul, W9AC