On Tue, May 6, 2014 at 2:10 PM, James Knott <james.knott@rogers.com> wrote:
Greg Freemyer wrote:
Do any of the 220-240v mains devices assume one of the legs is ground?
A lot of US devices over the last couple decades do. They connect that leg to the outside case of the device. Typical examples are drills / saws / etc.
Using a 2-phase US circuit to simulate a 1-phase 220v circuit would be dangerous if there are devices that depend on one of the legs being ground.
Any devices that do that cannot have any exposed metal parts that aren't double insulated from the power conductors. Those with metal cases, such as drills etc. are supposed to be grounded separately from the power conductors.
James, We're way off-topic, but if the power legs are doubly insulated from the chassis, why does it matter which leg is ground? (I'd google, but I don't what to search for. I did find it is called a class II device, but not the reason for not letting the plug work both ways.). I had assumed they were using that one leg as both the return and as ground. Greg -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org