Reply to "Fuses/circuit breakers"

I don't know what the wattage rating is for that transformer, but I'm sure less than 10 amps is required.  For those old transformers:  Take the wattage rating; multiply times 0.75; divide the result by the maximum voltage the transformer can put out.  The result is the maximum continuous amperage.   Ideally, use that as a maximum rating on the U; on the others, that or some lesser capacity depending on the level of protection you want to afford your wiring and devices.