Tim - it's happening cuz electrically they're wired different internally, there are a number of applications where reversing a motor is useful and it's cheaper with mass production nowadays to have a single product suit the widest possible range of uses

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot