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Unusual MCB

Sparkymania
Here's an interesting one.

Federal Electric 20A MCB. Had no type on it and was taking a long time to trip. Opened one up and discovered why it didn't have a type.

Others with it were ECC but virtually the same design. Only thermal. Both are plug in types called stab-lok and are bakerlite.


No instantaneous trip mechanism. Only a thermal one.



34200b5e07a12e120f5fc679b8b1b9aa-huge-mcb-with-no-instantanious-trip-mechanism-4.jpg
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    Looking at the others on ebay I thought the colour may have some significance too as they have a label on the front stating the type so I would say they do have a magnetic mechanism.

    However, some of the black toggled ones also have a type stated on the front as well so I would say the coloured ones are all later ones and they started making them with magnetic mechanisms first with the black toggles before colouring them.


    I still couldn't find an RCBO with a type stated on the front or on the sides (from the ones with side pics) so that still begs the question as to whether these RCBOs have a magnetic mechanism.

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  • 0
    Looking at the others on ebay I thought the colour may have some significance too as they have a label on the front stating the type so I would say they do have a magnetic mechanism.

    However, some of the black toggled ones also have a type stated on the front as well so I would say the coloured ones are all later ones and they started making them with magnetic mechanisms first with the black toggles before colouring them.


    I still couldn't find an RCBO with a type stated on the front or on the sides (from the ones with side pics) so that still begs the question as to whether these RCBOs have a magnetic mechanism.

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