[Boatanchors] AC Connections

[Al Parker]

Hi Barrie,
	I'd re-wire it, hot wire in, to the fuse, then the switch, then the 
xfmr primary.  The neutral line to other side of the primary.  Put an 
.01 X1Y2 AC cap across the line & from neutral to gnd.
	I'll quote here from Roy Morgan:
----------------------
"Line cords and how to install one safely:

(in US standard line cords):
GREEN is safety ground, and should be tied directly to the chassis.

BLACK is "hot" or "line" - it goes directly to the rear of the fuse 
holder, the terminal farthest from the outside of the fuse holder where 
the cap is installed.  The terminal on the fuse holder nearer the 
chassis or panel goes off to the switch and should go nowhere else.  If 
you use an open clip-style fuse holder under the chassis, use either end 
of it.

WHITE is "neutral" and goes UN fused to the system, e.g. power 
transformer primary.  Do not put a fuse in both power cord lines. This 
can lead to a dangerous situation, though it's less likely to be 
dangerous with a three wire grounded line cord than with the deadly 
fused two-wire un-polarized line cord plug.

On the line cord wall plug,
   - the round, longer pin is green
   - the larger flat pin is neutral
   - the narrower flat pin is line or hot."
------------------------------------------------------
73,
Al, W8UT
www.boatanchors.org
www.hammarlund.info

"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole

On 9/19/2010 6:28 PM, Barrie Smith wrote:
> Hello:
>
> I'm working on an old (1945) audio amplifier that I'm going to use as a speech amp.
>
> The unit works just fine, sounds good into a speaker, with no hum.
>
> It uses a terminal strip for all connections, including the AC in, which was for only two wires, no ground.
>
> I want to put a three wire line-cord on it, but I'm having trouble deciding which terminal the hot lead should go to.
>
> According to the schematic, the AC in is fused on one leg and switched on the other leg.  There is a .1 mfd oil to ground on the fused side, after the fuse.
>
> The AC in, after the fuse in one leg, and after the switch in the other, goes directly to the main power transformer and no place else.
>
> Which leg should I attach the hot wire to?
>
> 73, Barrie, W7ALW
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