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RE: Some fiddling and some discoveries...

bcowen,

Thank you for posting the schematic diagram for the IEC/switch/fuse/filter unit.
http://www.audioasylum.com/audio/tweaks/messages/20/202695.html

It helped a lot, at least for me, to know what all the thing did.

I still wonder if the safety equipment grounding conductor travels/passes straight through the thing.

Also I would have never thought it had a double pole single throw power switch, DPST.

As for the fusing of both incoming lines. The schematic diagram shows a jumper through the fuse clip on the neutral Line. That indicated to me a fuse should not be needed on the 120V unit. A neutral should never be fused. It can be dangerous in certain circumstances. What I don't know for sure is what the OP has. He could just pull the fuse on the N, neutral, side and check for continuity across the fuse clips.

I believe the unit is designed to be used on 240V as well as 120V power systems. That would explain the DPST power switch and both hot AC power lines fused. The thing is the 240V mains would have to be both Hot ungrounded conductors. Maybe for a Europe 240V balanced power system...
Jim



Edits: 11/07/16

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