I have a 2 pole 30 amp breaker on my boat. I installed it because
Nigel Calder recommended it in this book. I just went to the local
electrical supply house and told them what I wanted. I also took
along Nigel's book so they could see the precise wording. They had no
problem pulling it out of their inventory.

Lee Huddleston
s/v Truelove
on the hard at Bock Marine
Beaufort, NC