Service entrance wire should be AWG #3 copper.
Judging by your question I'm going to take a guess and say you should probably not attempt to do this yourself. Nor do I recommend it. That being said. You can either have your service upgraded to 200amp, and install a 100amp double pole breaker and branch it off into a 100 amp sub panel. You could most likely re-use your old panel for the 100 amp sub panel. Or... You could have your new 200 amp panel installed in a different location and your current panel wired into it for 100 amps.
At that distance you will have a voltage drop of 81.25 volts if you use the recommended #6 wire on a 240 volt, 100 amp single phase circuit. Therefore I recommend you contact you electric utility and let them figure the voltage drop and the size wire required to safely run this distance. Using too small a wire can damage the electronics at the end of the run.
8 is the size of wire to use for grounding a 100 Amp panel. Green is color used for grounding8 is code.A #3 copper wire with an insulation rating of 75 or 90 degrees C is rated at 100 and 110 amps consecutively.
A two pole breaker protects both L1 and L2 legs. An over current on either leg will trip the breaker.
100amp
Rated for exactly 60amps you will find limited breaker spaces due to the rating of the hardware used in it's construction and air circulation restrictions from the equivalent limited enclosure area. When rated at a determined amperage level it is required to construct the device based on the worse case possible scenario which includes a continuous running load. This will determine it's minimum standards according to local and national codes for hardware, room, spacing, and, layout. This does not limit you to only this size panel though. As long as you install the 60amp breaker first in your house panel anything installed down stream {from the load side of the 60amp breaker will be protected up to 60 amps. Therefore you are permitted to exceed those ratings and still remain within code because regardless of what your load is, it can not exceed 60 amps without tripping the breaker. You can install a 12/24 {12-full size or 24-half size [mini's]} 100amp panel for additional breaker spaces and the cost difference is negligible. One code issue to consider is if the sub panel in the garage is not in line of sight of that 60amp breaker then you might want to install another 60amp breaker in the garage panel to interrupt the incoming power giving you the ability to work on/in the garage panel without the possibility of someone re-energizing it mistakenly. I would suggest before this to consult with an electrician for a load calculation to determine if there is 60amps of available power in the 100amp panel in the home. This panel may not have an over-current 100amp main breaker which means it is possible to exceed the panel rating of this unprotected panel. Installing a 100amp over-current device {breaker, fused safety switch, fuse block etc...} like your 60 amp breaker to the garage it will limit the total load to only 100amps. Good Luck and obtain all permits and full understanding of the project and safety protocols in it's regards.
The formula you are looking for is volts x amps divided by 1000.
Service entrance wire should be AWG #3 copper.
Any size two pole breaker up to the value of 100 amps. Just make sure that the wire used to connect to the sub panel from the main panel is of a size to correspond to the breaker size. Wire amperages at 90 degrees C are, 30 amp #10, 40 amp #8, 55 amp #6, 95 amps #4,110 amps #3. Also keep in mind to look and see if the sub panel is rated at 100% or 80% load capacity. If it is only 80% load capacity then reduce the amperage rating of the conductors by 80% to obtain their new capacity rating.
A circuit breaker, like a switch, turns power on and off by moving one conductor to touch or not touch another conductor. The gap when not touching has to be large enough that electrons cannot pass through the air to the other conductor, producing a spark. The larger the voltage, the farther it can pass through the air, and the larger the gap must be. So the rated voltage of a circuit breaker or a fuse is the largest voltage it can safely control.
100amp on a RCD
You can divide a three phase service into (3) single phase circuits providing you have a 4th neutral wire.
Recheck the wiring around the fuel pump, or check your polarities on the battery. Something is shorting out!
There could be several reasons for the power shutting off or lights flickering with a 100 amp breaker on an outside pole, including overloaded circuits, short circuits, loose connections, or a faulty breaker. It is recommended to contact a qualified electrician to inspect the issue and address any potential safety hazards.
Another 10 amp fuse. If you use anything larger, you can fry your equipment, cause a fire, and so on. If this fuse is blowing all the time, there is a short in the component or wire.