Well it's a 240 volt 20 amp machine. Should take a 20 amp breaker but the instruction manual says to put in a 40 amp breaker. Doesn't make sense to protect a 20 amp piece of equipment with a 40 amp breaker. All the wiring I got is # 10 even though only # 12 is required for 20 amps, I always add a bit for safety. Can't think of why they would recommend a 40 amp breaker for a 20 amp circuit and tell you to use #12 wire.
And I've heard of super lag fuses but not a super lag breaker.