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freddo

freddo

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Was fault finding why the 63A MCB for some sports pitch lights was randomly tripping. Opened the DB and saw this. How many defects can you find?!
flood.jpg
 
ipf

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I like the 'on' arrows.....when the breaker tells you anyway.
Although it may be 'Oz'..... Never never land.
I saw the word 'morons' quoted on another thread, earlier. More relevant here, I would say. Just bad work done by someone ignorant of requirements.
A great factor, initiated by M Gerin is the individual MCB isolation, when it's used correctly.
 
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pc1966

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Was fault finding why the 63A MCB for some sports pitch lights was randomly tripping. Opened the DB and saw this. How many defects can you find?!
Do those bus-bar screw covers actually cut power as the on/off says? If so a couple are half-way!

Not to mention that unused ons that should be in the off position...
 
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Do those bus-bar screw covers actually cut power as the on/off says? If so a couple are half-way!

Not to mention that unused ons that should be in the off position...
Yes they do......just bad work, obviously
 
ipf

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Called out to replace a faulty 2gang switch. Managed to get to the supply in the dark under the stairs but it took a few moments to fathom out where to isolate the lighting circuit. Built in 1965, original wiring, with various additions, of course.

IMG_2264.jpg

Oh Yes, there it is........

IMG_2266.jpg
 
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M

Mikegh

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Would you bother looking for fuses in that scenario or just turn off the DP main isolation ?

That's what I tend to do if posssible
 
ipf

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Would you bother looking for fuses in that scenario or just turn off the DP main isolation ?

That's what I tend to do if posssible
If you look at the main switch, that's what I did.
It just needed a bit of looking at....no labelling....and it does tend to help knowing what's what.
Could have been fed from a 60amp fuse, for all I knew.
 
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Mikegh

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Yes I see that now

I was just wondering what your approach was

I usually just go for the main isolation in unknown installations where possible .
 
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Was that even the original MCB, they never downrated it to a 20 and connected the boiler in ?

Crazy if they did all that
 
GBDamo

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Called out to replace a faulty 2gang switch. Managed to get to the supply in the dark under the stairs but it took a few moments to fathom out where to isolate the lighting circuit. Built in 1965, original wiring, with various additions, of course.

View attachment 90072

Oh Yes, there it is........

View attachment 90074

Not bad but not a patch on this monkey I found tonight.

20210915_190337.jpg 20210915_190433.jpg

To me that is an unsheathed MICC which has had the insulation stripped back and the copper covered with tape.

Don't know if there's a fuse or link in the carrier but either way it's iffy as.
 
Matthewd29

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Not bad but not a patch on this monkey I found tonight.

View attachment 90086 View attachment 90087

To me that is an unsheathed MICC which has had the insulation stripped back and the copper covered with tape.

Don't know if there's a fuse or link in the carrier but either way it's iffy as.
Red and blue tape?? Were they planning ahead with the blue tape or taking a step back in time with the red tape?
 
ipf

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Not bad but not a patch on this monkey I found tonight.

View attachment 90086 View attachment 90087

To me that is an unsheathed MICC which has had the insulation stripped back and the copper covered with tape.

Don't know if there's a fuse or link in the carrier but either way it's iffy as.

Norweb crimp sealed, too. It must have been like that when it was sealed.

It looks a bit weird....like an extra fuse to the left of a 3 phase supply....there's a tail coming into the bottom of it.
 
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GBDamo

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Norweb crimp sealed, too. It must have been like that when it was sealed.

It looks a bit weird....like an extra fuse to the left of a 3 phase supply....there's a tail coming into the bottom of it.
I don't think its a tail but a random T&E routing behind.

The MICC is a feed to another cutout on the back of the wall the TP cutout is mounted on.

It's a single phase domestic supply, with its own cutout and meter, looping off of this three phase supply.

I too was left scratching my head how it ever got like that, it's not safe that's for sure so I can't bring myself to believe that's how NorWeb left it.
 
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I don't think its a tail but a random T&E routing behind.

The MICC is a feed to another cutout on the back of the wall the TP cutout is mounted on.

It's a single phase domestic supply, with its own cutout and meter, looping off of this three phase supply.

I too was left scratching my head how it ever got like that, it's not safe that's for sure so I can't bring myself to believe that's how NorWeb left it.
Fair enough. It does look like it, though. Being onsite always clears some things up.
 
Dartlec

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Was that even the original MCB, they never downrated it to a 20 and connected the boiler in ?

Crazy if they did all that
The original CU install was done in 2012 by a clearly competent (or at least neat) installer (though one of the RCDs was labelled Time Delayed, which confused me at first since it isn't.

Originally a 6mm feed to a shower in the bathroom, which was adjusted down to 20A and then 2.5mm connected in a brown junction box in the loft to run to the boiler...

It was clearly a rewire done at the cheapest possible cost at the time - 80s white cabling cut and left, alongside the original 30s fabric singles in metal pipe in places - run over joists in the loft, etc, single sockets replaced at an angle, etc.

CU was neat though!

Fortunately I keep old MK breakers in the van so was able to put a proper 20A in there at least.

Took me longer to retrieve the busbar from the 3 foot drop under the floorboards where it immediately fell when undoing it 🤬 I was there for 15 minutes with a rod and hook like a bloody fairground machine!
 
telectrix

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Took me longer to retrieve the busbar from the 3 foot drop under the floorboards where it immediately fell when undoing it 🤬 I was there for 15 minutes with a rod and hook like a bloody fairground machine!

that's a good argument in favour of using steel busbars:

1. saves valuable copper resources.
2. you can retrieve a dropped busbar with one of those poundshop telescopic magnets.
 
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Mikegh

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The original CU install was done in 2012 by a clearly competent (or at least neat) installer (though one of the RCDs was labelled Time Delayed, which confused me at first since it isn't.

Originally a 6mm feed to a shower in the bathroom, which was adjusted down to 20A and then 2.5mm connected in a brown junction box in the loft to run to the boiler...

It was clearly a rewire done at the cheapest possible cost at the time - 80s white cabling cut and left, alongside the original 30s fabric singles in metal pipe in places - run over joists in the loft, etc, single sockets replaced at an angle, etc.

CU was neat though!

Fortunately I keep old MK breakers in the van so was able to put a proper 20A in there at least.

Took me longer to retrieve the busbar from the 3 foot drop under the floorboards where it immediately fell when undoing it 🤬 I was there for 15 minutes with a rod and hook like a bloody fairground machine!
Don't like that where they downsize the cable and breaker

Bad practice imo
 

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