Polarity switch and the "Death Cap"

[rhubarb9999]

I am about to jump into building the Twin from Tino Zottola's book .. using an old Earth bass amp as the starting point.

I have been reading about the horrors of the Polarity switch and the 'Death Cap'. As I understand it, older amps that did not have a grounded plug and the cap and polarity switch created the potential for a nasty shock if you touched another piece of equipment with a polarity that was opposite.

Looking at the layout below, it appears this design has a ground to the wall, but still has the ability to switch polarity (I assume to remove hum?)

Is this design considered safe? Or should I just eliminate the switch and wire up the power 'normally'?

[skyboltone]

Well. Tino can do whatever he wants but I believe that the National Electrical Code REQUIRES that the power supply ground from the wall be hard wired to the chassis. Direct mechanical/electrical connection. No caps. That is unless the chassis is made of an insulating material and you have submitted the design to Underwriters Laboratorys for testing and approval.

[Funkalicousgroove]

Skip the death cap, it doesn't do anything for you