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US cable question

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  • 15-04-2008 2:40pm
    #1
    kerash
    Registered Users Posts: 6,688 ✭✭✭


    I have a battery charger (for a camera) with a US cable, it says 125v on the power cable but the charger has 100-240v input on it. What can i do to use this in Ireland to charge my batteries! :confused:


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    #2
    byte
    Moderators, Regional North West Moderators Posts: 19,123 Mod ✭✭✭✭byte
    byte


    Is the power cable a standard "Figure 8" lead, like what's used on stereo's and VCR's etc?

    If so, just get an Irish Fig.8 lead.


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    #3
    kerash
    Registered Users Posts: 6,688 ✭✭✭kerash


    Actually i'm fixed up now the lads in the photography forum had previous!!!

    I just changed the plug and it was grand, I was worried bout blowin it, hence the advice seeking:)

    Thanks tho!


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    #4
    Gadgetman496
    Registered Users Posts: 8,398 ✭✭✭Gadgetman496


    kerash wrote: »
    Actually i'm fixed up now the lads in the photography forum had previous!!!

    I just changed the plug and it was grand, I was worried bout blowin it, hence the advice seeking:)

    Thanks tho!

    Just be aware that the greater the voltage the greater the amperage, in other words, the 240vac will draw more current & because the original lead was not designed for that (it is much thinner physically) it may be prone to overheating.

    You would be wiser to replace the lead & not just the plug.

    "Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid."



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    #5
    kerash
    Registered Users Posts: 6,688 ✭✭✭kerash


    gadgetman496 wrote: »
    Just be aware that the greater the voltage the greater the amperage, in other words, the 240vac will draw more current & because the original lead was not designed for that (it is much thinner physically) it may be prone to overheating.

    You would be wiser to replace the lead & not just the plug.

    Aye, I will do, wanted to charge up asap so that was the quick solution


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    #6
    zilog_jones
    Registered Users Posts: 6,638 ✭✭✭zilog_jones


    gadgetman496 has it the wrong way round. Current is lower with higher voltage. They are inversely proportional. 13 Amps is nothing in 110V land!


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    #7
    blastman
    Registered Users Posts: 5,451 ✭✭✭blastman


    Good old Ohm's Law... :)


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    #8
    watty
    Registered Users Posts: 32,417 ✭✭✭✭watty


    However if it was just a resistive load, it would take twice the current on 220V, FOUR times the power. But a SMPSU uses roughly constant power (Ignores Ohmns Law) so uses half the current.

    Ohms Law V= I x R
    Power = V x I = V x V /R (Voltage Squared / resistance)

    You do need more insulation on 220 .. 240V cables than some 90V .. 120V cables have.

    The 125V is usually a UL safety rating.


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