In an instrument which will be sold in the USA, is there a requirement for double pole switching of the mains?
There'll be a chassis-mount IEC mains input plug at the rear and a mains switch on the front, then off to PSUs and low voltage electronics.
It may seem a silly question, but the mains switch used on the prototype is rather nice but only available as single-pole.
Is there some guidance which is less than hundreds of pages of regulation?
Cheers