exp626 Posted February 9, 2020 Posted February 9, 2020 Hi all, I have a Mac integrated amp from USA 110 that use a fuse rating at 10A 250V. Now that the amp had been moded to 230V, what’s the fuse rating I should use? Remain same at 10A 250V or 5A 250V ?
Lwcm Posted February 10, 2020 Posted February 10, 2020 Since watts/volts = amperage draw and assuming watts is constant. 1000w = 10A x 110 So for 230v the amperage would be 1000w/230 = 4.35A So max A is 4.35 before fuse cut off. Not sure if above method is correct.
Saycheese78 Posted February 11, 2020 Posted February 11, 2020 Numbers all correct at high level.. Replace W by 'VA', will be perfect. Some may say, Hay 60hz has higher power than 5phz. Nah, dun worry as you typically have to leave x3 allowance so does not matter.
dewdrop Posted February 12, 2020 Posted February 12, 2020 Since watts/volts = amperage draw and assuming watts is constant. 1000w = 10A x 110 So for 230v the amperage would be 1000w/230 = 4.35A So max A is 4.35 before fuse cut off. Not sure if above method is correct. Provision for the inrush during the start up, go with a slow blow at a lower ampere rating, that should be fine.
kimurastanley Posted February 12, 2020 Posted February 12, 2020 For audiophile fuses such as synergistic research, SR advises to move up a value to account for sensitive start up. Example if stock fuse is 5A, suggests to get 6.3A.
Audio Posted February 12, 2020 Posted February 12, 2020 It depends where this fuse is located. If it is before the transformer, then it should 5 Amp. If it is after the transformer, then it should remain the same rating at 10 Amp. (Audio)
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