I am installing a 7,7 KW diesel 110v generator on my boat. I need to know the main breaker disconnect size in amps
Within the USA the national electrical code for wall outlets call for using 12 gauge wire and a 20 amp breaker and a 20 amp outlet. They have to be sized together like this. If you are using heavy duty equipment that draws a lot of amps then only have 1 outlet on that circuit. You really should consult a local electrician on this.
Should be a 65 amp breaker or 70 I doubt that you will find a single pole breaker that size Are you sure that size generator is not 230volts but has 120volt output also?
Is the 7.7 KW mechanical or electrical? If you have 7.7 KW electrical, I will assume you will be delivering 2 legs at 120 V and -120V; 7700 watts/240 v 32 amps so I believe the main breakers should be 32 amp each approximately.
