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60 Amp Junction Box.

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Mornin' All,

                      I came upon a burnt out terminal on a Crabtree ceiling 50 Amp. shower cord switch yesterday. The cables had become so hot after 3 years of use that the line P.V.C. had completely fallen off the conductor and had left a horrible black smelly sticky mess.


I had to replace the shower cord switch, but the damaged cable was then too short after removing the softened copper and damaged insulation.


So I had to make a trap in the room upstairs, which turned out to be wooden boards over other wooden boards to access the cable below with a view to lengthening one cable. I used a new 60 Amp junction box as it allows two large conductors to overlap and be secured by 4 screws. It is solid and of good quality.


It is this item.....

https://www.toolstation.com/60a-junction-box/p98775?store=N2&utm_source=googleshopping&utm_medium=feed&utm_campaign=googleshoppingfeed&gclid=EAIaIQobChMIufLP1ZD25gIVybTtCh2YWAeiEAQYASABEgJZkvD_BwE


Z.
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    It is your definition of "crimps" that is at fault then Z, perhaps you are thinking of yellow ones and some shoddy crimp tool which does not work properly. This is an ideal place to use proper tube crimps, and the correct crimp tool. Larger crimps are of course available, I rather like the ones for 400mm2 cables with M20 bolt lugs, as they enhance any domestic job, but then perhaps I am too purist! The cost of the hydraulic crimp tooling is also somewhat high, but once one has it there is a captive market.


    One may also wonder why this cable got hot and burned up its insulation. This will certainly be due to a loose connection, and probably a screw left loose or very low clamp pressure. Crimp connections are much more reliable than screws, provided the correct crimp and crimp tool is used.
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  • 0
    It is your definition of "crimps" that is at fault then Z, perhaps you are thinking of yellow ones and some shoddy crimp tool which does not work properly. This is an ideal place to use proper tube crimps, and the correct crimp tool. Larger crimps are of course available, I rather like the ones for 400mm2 cables with M20 bolt lugs, as they enhance any domestic job, but then perhaps I am too purist! The cost of the hydraulic crimp tooling is also somewhat high, but once one has it there is a captive market.


    One may also wonder why this cable got hot and burned up its insulation. This will certainly be due to a loose connection, and probably a screw left loose or very low clamp pressure. Crimp connections are much more reliable than screws, provided the correct crimp and crimp tool is used.
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