The answer to 'what size fuse box do I need' is that the size of your fuse box or circuit breaker panel depends on the total electrical load in your home. Most modern homes require a 200-amp service panel, which can handle the electrical needs of a typical household. However, larger homes or those with high-power appliances may need a 300-amp or 400-amp service panel.
When determining the right size fuse box, you'll need to consider factors like the square footage of your home, the number and types of electrical devices and appliances you have, and any planned future expansions or renovations. It's generally best to consult with a licensed electrician who can assess your specific electrical needs and recommend the appropriate fuse box size.