What do I need to replace this - photos

[sws]

Hi
Have the following setup in a distribution box supplying a swimming pool. One of the 16A switches (4th from right) has died - 240V goes into it, but nothing comes out! I assume this is just an isolator switch fed by the rcds on the left and has no trip function itself? Any suggestions as to what I need to use to replace the switch?
Thanks

 

[Graeme Harrold]

Personally would recomend a qualified sparky, esp with it supplying a swimming pool which is defined as a special location.

 

[Adam W]

They look like double pole switches to me as well.
You could swap it for the one on the end, firstly to check it is the switch that's faulty, and secondly so you can take the faulty switch down the wholesalers.

 

[topquark]

Double pole isolator. I'd be wanting to check why it's failed as well. It'll be feeding the pump, filter and heater so maybe one of them is faulty. My advice would be to get them checked by a competent electrician.

 

[VoltzElectrical]

call me thick, but I can't make head nor tail of this setup. Can someone PLEASE explain what is going on here, I keep looking at the supply and outgoing feeds, but...... I love to learn.

 

[Des 56]

Looks like Mcbs,each feeding a double pole switch, all covered by one Rcd

 

[VoltzElectrical]

I've had another look at it. So, as far as i can see, a two core SWA feeding the RCCB, the neutrals linked out on the outgoing side, and the lives linked out too. But to WHAT?? and why the discrepancy between the 'devices' whatever they are?

Can someone clear this up for me?

 

[Des 56]

The load terminals of the Rccb feed a single pole mcb,the other mcbs are fed by the links,from each load terminal of the mcb,a feed is taken to a double pole switch,the double pole switches each have a neutral from the link neutrals off the rccb load neutral

Each circuit is then fed by relevant rated mcb to double pole switch for isolation, to the item that needs supplying
The rccb covers all circuits

 

[jason jones]

looks like rccb feeding mcbs which in turn go through double pole isolators to equipment. seems like you need to replace with another double pole isolator, probably of any make as it seems they are just placed on din rail.

 

[VoltzElectrical]

but you've got 5A feeding 16A etc.. or am I reading this wrong?

 

[Des 56]

they appear to be standard 16 amp double pole switches
Its the mcb size that is important
Oversising a switch is ok

 

[jason jones]

as des 56. think 16A is just switch rating not overload or anything like that, just like consumer units have 100A main switches.

 

[VoltzElectrical]

if i have it right, the mcbs are on the left, feeding the DP switches on the right? why not have the means of isolation built in to one device?

 

[JD6400]

What do i need to replace this ?
To the original post -
Not wishing to sound rude or arrogant mate but i would simply just say a qualified electrician !
It is a swimming pool there may be a underlying fault , why risk it ?
I am all for helping others out on this forum but some jobs just need a sparks , as simple as that .

 

[Engineer54]

Double pole isolator. I'd be wanting to check why it's failed as well. It'll be feeding the pump, filter and heater so maybe one of them is faulty. My advice would be to get them checked by a competent electrician.

I hope this set-up ''isn't'' controlling the swimming pool pump, that is normally done via a S/Pool control panel which would include the pump motor starter c/w overload module. It will also control any under water pool lighting, along with any heater control modules.

So Sws, ....What is this CU set-up controlling???

 

[topquark]

I hope this set-up ''isn't'' controlling the swimming pool pump, that is normally done via a S/Pool control panel which would include the pump motor starter c/w overload module. It will also control any under water pool lighting, along with any heater control modules.

So Sws, ....What is this CU set-up controlling???

The it I was refering to was the breaker, not the CU in the picture, it's a sub main feed.

 

[Deleted member 26818]

Looks like there are two MCBs in series for each circuit.
The first ones controling the line, and the second ones controling both line and neutral.
To my mind, you should be able to replace the whole lot with a 6 way CU with an RCD as main switch and four MCBs.

 

[paulanderson22]

an electrician!

 

[aptsys]

Looks like there are two MCBs in series for each circuit.
The first ones controling the line, and the second ones controling both line and neutral.
To my mind, you should be able to replace the whole lot with a 6 way CU with an RCD as main switch and four MCBs.

Nope. They are 16A DP isolators, otherwise there would be markings for the curve and type of protective device.

 

[Had8Lives]

Think I might have noticed something that no one else has. Is the enclosure plastic? If so, there appears to be NO means of main earth. These needs checking by a qualified sparky!

 

[topquark]

Think I might have noticed something that no one else has. Is the enclosure plastic? If so, there appears to be NO means of main earth. These needs checking by a qualified sparky!

I'd rather assumed that the banjo connector at the bottom was supplying that?

 

[RWJ]

I'd rather assumed that the banjo connector at the bottom was supplying that?

Second That

 

[Deleted member 26818]

Nope. They are 16A DP isolators, otherwise there would be markings for the curve and type of protective device.

So they are, just bin them then and replace the non-working MCB.

 

[aptsys]

DP isolation might be needed for some other reason. TT supply?

 

[Engineer54]

The it I was refering to was the breaker, not the CU in the picture, it's a sub main feed.

Not at a rating of just 16A, that i very much doubt!! We need the OPs input here, to tell us what this panel is actually supplying, or were just going to continue assuming everything. Like why DP isolators?? If DP isolation is a requirement then why not of made use of just DP breakers instead of the present configuration...

 

[85mick85]

it looks fecked up to me............if i wer you id replace the whole db with a new one with new rcbos........if its a swimming pool your bound to have made a few quid over easter????? you can affored it!!!!

 

[Deleted member 26818]

DP isolation might be needed for some other reason. TT supply?

Got that with the RCD.