"Dave Plowman (Nutcase TROLL)"
Phil Allison

The principle of Class II is that there is NO REQUIREMENT to rely on
earthing for user protection at all,

** Not correct.

There must be NO earth connection made to the item.

The familiar notice reads:

" Double Insulated Do Not Earth. "
-------------------------------------

Which means then in amplifier terms it cannot be connected to a device
where the signal ground is connected to main ground?

Something wrong there...

** Absolutely correct.

Class II items should ONLY be interconnected with other class II items,
however with audio and video gear, everyone breaks the safety rule. The
hazard of doing this is an X rated topic that one must never mention.

Class II items are inherently safe until you connect them to a class I
item - so when that class I item develops a safety fault, the whole shebang
becomes a death-trap.

With a class I system, each item grounds the others so it is also inherently
safe.

In the world of live music, I have come mixed class I / II systems that are
very scary.



..... Phil