Shower Pullcord

[Sparky Stu]

I am an adult trainee and i am trying to understand a problem that i must have with my shower pullcord isolater in my bathroom. Recently it has burnt out and was wondering what has caused this, as i have replaced this isolator a few times over the years.

The neutral cable on the load side is the cable that has always burnt out. The cable is 10mm and the length of run cannot be that great as c/u is located in the kitchen directly under my bathroom. The shower is 8.5kw on a 40A 60898 MCB.

Each time i have replaced this pullcord i have stripped the cable back to where the cable is in good condition. Just looking for some possible answers as cable is now beginning to get a bit on the short side from all the previous stripping back. Cheers Stu

 

[millwall ken]

Also make sure you use the units, power on/off switch to actually turn the shower off. Quite often people just use the pull cord to turn the shower off and therfore your switching under load, which will reduce the life of perhaps cheaper switches.

Thank you Malcolm, I don't really do domestic, but even I know that you MUST advise customers to NOT use the pull cord as an on/off switch. Hence the reason that I was taught to always shorten the cord, so that an adult would have to stretch to reach it.

 

[SimpleSimon]

Many thanks SimpleSimon.
Your spot on as per OSG but I am amazed that you could have a pull cord switch within zone 1 at all.I would never have it in my house with all that condensation in the shower,seems daft.
I must confess that all shower fitted I always locate a DP isolator outside,don't like pull switches seems old fashioned to me.
Thanks again.

I use pull cords but would never put in Zone 1 either for same reasons. Plus the string gets too wet n rotten.