Corrosion on Live wire of shower pullcord switch

[Glyn1959]

I noticed the above when I went initially to clean the fitting. However, now I am replacing because the fitting looks somewhat brittle inside. I have enough play in the cable to cut off the corrosion but what caused it?

Is it simply a case of the atmosphere in the bathroom? If so I have installed an exractor fan with a humidistat so the conditions shoul greatly improve.

 

[alexnic]

Could be a bad connection ...

You should get some heat resistant sleeving with the new fitting, just slip it over the new bit of cabling when connectint the new fitting

 

[steveb]

It could be a loose connection, however something else to keep in mind is that the contacts within the switch itself deterioate with age and can eventually cause the insulation and the condutor to heat up and cause subsequent damage to the cable at the point of connection.

It is possible that you require a new switch.