Its more like a computer PSU, supporting 110v/230v on input, but a variaty of specs on output. I also really doubt headphones could ever use 250v, or even 125v. Even a USB wall charger will have to accept mains in (110v/230v), but then output USB specs in volts amps. The cable can't produce excessive voltage - your house will have one mains voltage, so using a 250V cable instead of a 230V one will be fine. As *j* rightly points out, the fuse in the cable must have the correct rating - if your kettle draws (say) 10 amps, but your computer cable has a 3 amp fuse, then you'll blow the fuse when you switch on the kettle, no matter whether you're using a 230V So we can size the conductors for a 30A circuit which would be a #10 conductors. The overcurrent protection which I assume is a molded case circuit breaker is calculated a little different. the "K" designation on the nameplate is a Locked-rotor Code Letter and it gives us a rating from NEC Table 430.7(B) which basically states that if your saw The fuse would have a rating impressed into one if the steel caps that looks like: 250V 312 5A Indicating it is a 250 Volt, 5A fuse, and is a Littelfuse 312 series, which implies fast acting We need to get the next size wire: #6 AWG wire. This wire has a 65A ampacity and can handle 60 amps quite easily. That’s why we use #6 AWG wire for 40 amp service 100 feet away. We also use #6 AWG wire for 40 amp service 150 feet away. When the sub panel is 200 feet away, however, we have to add 40% on top of the 50A minimum ampacity. Jim_cliff11 said: Can I use a 240vac fuse in a 24vdc. In this case, I would say Yes you can use it. In general, the voltage rating on the fuse is there to prevent arcing after the fuse is blown. And of course, it is much "harder" to prevent arcing at DC circuit than AC. But additional details should be found on the fuse datasheet. This is the most amps all of the outlets on the circuit can deliver combined without tripping the breaker. This hypothetically could be one outlet delivering 15A and nothing connected to the rest, but usually that's not the case. Further, you would not normally run the circuit above 80% of the trip value continuously, in the example I'm using, 12A. The Square D by Schneider Electric Homeline 20 Amp Two-Pole Circuit Breaker is used for overload and short-circuit protection of your electrical system. This breaker is compatible with Homeline load centers and CSED devices. The ANSI-certified and UL-listed unit is rated for 120/240 VAC and 10,000 AIR. Homeline circuit breakers are built with .

can i use 250v in 230v