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Phil Allison[_3_] Phil Allison[_3_] is offline
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Default Odd wiring in tube ampmschematics

Ralph Mowery wrote:


I am getting into this late.

When replacing the line cord on an older 2 wire cord ( no ground) with a
3 wire grounded cord, which is the perferred method ? Go from the hot
wire to the switch or the fuse first, then to the other and transfromer
, back to neutral ? Of course the grounded pin on the plug goes to the
chassis and the 120 VAC is isolated from the chassis by the transformer.

Several of us were discussing this the other day, but none of us knew
for sure which should come first, switch or fuse in the 3 wire 120 vac
equipment.


** I would opt for switch first, then fuse.

This is for the benefit of silly owners who like to swap back panel AC fuses while the item is plugged in - relying on the switch to isolate both ends contacts on the fuse holder.

Something that needs to be checked, cos only some fuse holders do this.