New MCB will not re-set

[garash]

Hello, When we had our bathroom fitted out in September, the company had to fit an MCB unit for the shower. When I used the shower today as I pulled the cord to stop it I heard the 'trip' so
upon investigation attempted to re-set this but nothing - there does not appear to be any power
going to this additional Mcb unit? All other appliances working ok. I am of the understanding that the electric shower unit itself is wired in directly to this additional 45amp Mcb unit.

 

[PrenticeBoyofDerry]

Are we talking MCB or RCD/RCCB/RCBO. or a bit of both?
Which device is it and does the device lock into the on position?
Some RCD units need to be switched fully off, then on again to lock-in!

A picture may help!

 

[Midas Man]

Why did you use the pull cord?

 

[PrenticeBoyofDerry]

Why did you use the pull cord?

Probably to isolate rather than stop the shower flowing

 

[Midas Man]

Pull cord is not for daily operation.

 

[PrenticeBoyofDerry]

Pull cord is not for daily operation.

I come across of plenty of users that isolate the shower after use. It is very common.

 

[JohnD]

When I used the shower today as I pulled the cord to stop it

Surely you are supposed to turn off the shower at its knob or button first, so it can flow water through to cool down the hot element, and close itself down.

Afterwards, turning off the ceiling isolator will be under no load so no reason to trip anything.

What do the instructions say?

 

[Midas Man]

Pull cord is not for daily operation.

I come across of plenty of users that isolate the shower after use. It is very common.

And the very reason pull cords fail prematurely.

 

[Doggit]

Interesting point Midas, we're so used to turning off the shower, then pulling the switch cord before you leave the shower room, that it could be also be treated like a switched spur in a kitchen which never gets switched off either.

Garash, reading your first post, it sort of suggest that you switched the shower off from the cord, rather than on the on/off button on the shower. can you verify how you do it please.

If you've been using the shower since September, it does sort of imply that the shower has become faulty. If there is an off button on the shower, switch this off, pull the cord to the off position, and then try the MCB again. Then let us know the results please

 

[PrenticeBoyofDerry]

And the very reason pull cords fail prematurely.

Absolute tosh!
There are number of reasons why they fail but not because they are used to isolate the appliance! And defo not the very reason!

They normally fail because of their location and debris falling into mechanism or a loose connection!

 

[Midas Man]

And the very reason I now know you know fook all about pull cords.

 

[RF Lighting]

Hi Midas man. Little bit of advice for you.

It is better to stay quiet and have people think you a fool, than to open your mouth and remove all doubt.

 

[EFLImpudence]

Anyway, it's their house and their switch.

 

[garash]

My husband has dementia so we leave the shower at permanent settings and use the pull cord to start/stop the water supply. The Mcb unit was installed purely because we
have old style fuse board so they fitted a single Mcb Unit solely for the Shower. Go easy chaps I am and old lady !

 

[Doggit]

As said earlier, when you switch off an electric shower (a modern one at least) they'll run the cold through for a few seconds to cool down the heating unit. By turning off the shower from the pull cord, this isn't happening, so it may well have killed the shower prematurely, hence the MCB won't reset whilst the shower is still switched on. Have you tried turning the shower itself off, then then resetting the MCB yet.

If the shower has failed, then replacing it with a digital shower that has the control switch outside the shower may be the way to go next.