Hi : ) I have what probably is a very simple question and thought this forum would surely be a good place to ask it. In the apartment I'm renting in the Los Angeles area I have an old looking fuse box that looks like this: The cover to the box has the following info: Currently when connecting a toaster oven (1500W) while the standard stove/oven is on (1500W) the fuse goes out and I need to replace it. From what I understand from researching the web, to use both ovens totaling 3000W, I would need a fuse with 25 Amps capacity 3000W/120V = 25 Amps However, I'm not sure I can use a 25 Amp fuse instead of the 15 Amp fuse currently in the box. Is a 15 Amp fuse the max I can use with this box? And if so, how come there's a 20 Amp fuse in there? I would ask my landlord, but I feel that I've bothered him with too many questions about the apartment and I'd rather figure things out myself to avoid being too much of a pain, if I can. If someone can help me figure this out, that would be great. By the way, if I use the toaster oven on a different outlet, then it works fine with the standard stove/oven, but the location is much less convenient and not practical. Looking forward to explanation and recommendations on how to remedy this. Thanks!