The PDF schematic is drawn incorrectly for the Rocket...

[guitarsnguns04]

isnt it true that a fuse is used to monitor the load aka amps of a piece of equiptment? In this case an amp. You have a hot and a neutral to create a complete circuit? The ground is there for safety reasons. If we have a load..say a transformer pulling 1.8 amps under load it is pulling the same load on both sides of the circuit equally? What difference does it make as long as it is grounded? the fuse will blow once the rating is exceeded by 10% usually. The load when read with an amprobe can be read on either leg and is always the same. I am not sure how big of a deal it really is. I stand corrected if I am wrong but this is the thought I had when I read this thread

[paulster]

You are correct, but you could still have a failure that causes excessive current consumption and blows the fuse. At that point you still have a large portion of the power supply 'hot' (the mains switch, the transformer, etc.) and potentially the chassis and/or transformer secondary depending on the mode of failure that blew the fuse.

Since the fuse has gone the only thing that will then complete the circuit is likely to be the user - to ground.

The idea of having the fuse being the first thing that the hot lead connects to as it enters the chassis is that if it blows the only possible part of the amp that could be hot is the couple of inches of wire between the power inlet grommet and the fuseholder. If you use an IEC with an integrated fuseholder then you don't even have that risk.

It's arguably more important in the USA, despite running on half the voltage that we do in Europe, because of the alarming tendency to use these things that people refer to as 'ground lift adaptors' or 'cheaters' whenever they get a bit of hum. Ironically these are actually designed to add a ground to a 2-prong outlet rather than to remove it! Fortunately there doesn't seem to be an equivalent product in Europe.

[jaysg]

I forget where we covered it, but KF wired the GZ-34 oddly. Normally, you'll see B+ coming off of pin 8, not pin 2. 'Tis a puzzlement.

[jjman]

If you turn off your garden hose only on the spray end, it still has pressure in the hose and could blow at some point. Better to turn things off (fuse/switch) as close to the "source" as possible. Safer that way.