[BC] Fused plugs - was Hot and grounded chassis

[Paul Christensen]

> E.F. Johnson used these fused plugs on, at least, some of their
> transmitters.  My Ranger and Valiant have the fused plugs you described.

Absent the possible depreciation in value, probably the safest solution is 
to eliminate dual-fused plugs altogether and replace them with a three-wire 
line cord with only the line side fused.  Neutral should never be fused. 
Hypothetically, if the neutral fuse blows in these older line cords and if 
neutral is tied to the chassis at any point (it shouldn't by today's 
standards but does exist on older equipment), a condition is created where 
the AC path is completed through connections external to the chassis -- like 
a grounded antenna or speaker terminal.

But if you look that the evolution of older, non-polarized home wiring, many 
times you never knew which side was truly neutral and no third-pin ground 
existed -- which gave way to early equipment manufacturers double-fusing 
their line cords.

Paul


====================================
Paul Christensen, CPBE, CBNT
LAW OFFICE OF PAUL B. CHRISTENSEN, P.A.
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pchristensen at ieee.org