Circuit breaker fuses

Discussion in 'Tech/Mech General' started by UK Pete, Mar 31, 2014.

  1. UK Pete

    UK Pete Read Only Funster

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  2. Techno

    Techno Funster Life Member

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    Dunno Pete but you can buy one hell of a lot of fuses for that price
     
  3. Techno

    Techno Funster Life Member

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  4. Moodybrook

    Moodybrook Funster

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    12v mcb

    Hi Pete, rightly or wrong I am using two of these 20A mcb s'. One on the pos lead from my solar controller to my leisure batteries and one on my connecting lead to my Veh batt which was the prime mover why I got them. (Left hand side of the controller in the pic)

    http://www.motorhomefun.co.uk/attachment.php?attachmentid=24209&stc=1&d=1396292935

    Everyone was telling me that when you start your engine all hell breaks loose. Nuclear attack on all circuits and Leisure batteries are melted into POP art. So a fuse is necessary to protect the world. I thought that if the end of the world came, then someone could come along and press the mcbs' button and service would be resumed.

    Funnily enough, I have forgotten to open the mcb, ie. break the connection to my Leisure batteries, twice actually (an age thing ?).

    Well bugger all happened ! The mcb didn't appear to flinch at all but Techno said that may have been because my batts were all charged, so no great movement of Amps. Whatever !

    Should have also said that because of above I don't actually know if they work !
     

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    Last edited: Mar 31, 2014
  5. Techno

    Techno Funster Life Member

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    I said? I never touch my fuses or disconnect anything it is fit and forget :thumb:

    Sounds like you have employed Clive Mott's fuse bridge
     
    Last edited: Mar 31, 2014
  6. hilldweller

    hilldweller Funster Life Member

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    An impressive piece of miniaturisation, for sure.

    But in the last 7 years I think I've blown about 2 of the 40 odd fuses so not very cost effective. Last one was a couple of weeks ago, I damaged a 12V connector, switched the 12V off then found the hard way when trying to straighten the + clip inside that this connector was on it's own fused permanent on circuit.
     
  7. pappajohn

    pappajohn Funster Life Member

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    fuses generally arc, due to the current being suddenly interupted, when they blow so these could possibly weld shut, or even open, when they trigger .

    The bigger the amperage, the bigger the arc.

    A regular fuse just blows and needs replacing so this doesnt matter then
     
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  8. UK Pete

    UK Pete Read Only Funster

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    Great replies, thanks fella's, i will but a job lot of normal fuses like in Thechno's link, i would worry that they could weld themselves as mentioned by pappajohn
     
  9. Moodybrook

    Moodybrook Funster

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    Sounds like you have employed Clive Mott's fuse bridge.
    http://www.motts.dsl.pipex.com/BRIDGING FUSE.htm

    I guess it must be his, I just came across it as an alternative to £90, or something, worth of battery master !

    5M of 10mm (sq) cable and a fuse was easier and hell of a lot cheaper ? :Smile:
     
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  10. Techno

    Techno Funster Life Member

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    For the Halfords fans just price up how much 60 fuses costs plus petrol :Rofl1::Rofl1:
     
  11. pappajohn

    pappajohn Funster Life Member

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    not saying Halfords are top dog but its all down to quality though.....

    Cheap chinese fuses have a nasty habit of melting long before they blow.
    Quality fuses will blow before they melt.....and will blow much closer to their rated amperage.
     
  12. Moodybrook

    Moodybrook Funster

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    Led fuses

    Hang on, while we are on the theme how about these sort of ordinary fuses that light up with a wee LED if they blow. Are they any good or are we back on the price thing again ? :Smile:
     
  13. Techno

    Techno Funster Life Member

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    Where do you think most of Halfords stock is sourced :Laughing: and Maplins
     
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  14. pappajohn

    pappajohn Funster Life Member

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    havent come across those but it seems like using a 500w floodlight to see in your understairs cupboard......pointless.
    You are buying something to show something isnt working and has no further use even though the led is working....if that makes sense.

    If a fuse blows the circuit it protects stops working.
    Takes a few seconds to change a fuse to confirm it was the fuse.
     
    Last edited: Mar 31, 2014
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  15. Moodybrook

    Moodybrook Funster

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    I appreciate that but it usually it is in the dark (Sods Law rules) and torch battery is always running down, if the wee LED light was glowing away, it would be easy to spot amongst the myriad fuses there seems to be in most mohos. In awkward blooming locations too !

    I was quite taken with the idea but I am a sucker for finding things to waste my hard earneds on.
     
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