UK Can anyone tell me what is wrong/incorrect.

[Penguin]

 

[littlespark]

Basic insulation


Or is this a trick question?

 

[James]

As above plus
grey should be used a N with blue sheath.
armour is not earthed.

 

[westward10]

Perfectly acceptable to use black as the neutral conductor providing it is correctly identified.

 

[buzzlightyear]

No switch fuse then for the feed then.
What is it feeding.

 

[mainline]

armour is not earthed.

It maybe at the other end.

 

[mainline]

Basic insulation

In an enclosure ?

 

[DefyG]

In an enclosure ?

Or not as the case might be.

Think there was a debate previously on the forum as to whether a meter box is considered an enclosure because it is lockable (don't laugh) and a key is needed!

 

[mainline]

Perfectly acceptable to use black as the neutral conductor providing it is correctly identified.

The supply is using black as neutral and grey as earth. I would seriously question the competence of someone who cannot even get that correct.

 

[DefyG]

Probably 16mm comparing physical size with the Blue tail and the G/Y but not necessarily incorrect.

 

[DefyG]

black as neutral and blue as a line.

Blue? looks like Brown to me!

 

[mainline]

Blue? looks like Brown to me!

It was from a post.

Could someone please tell me if this is right or wrong please.

Right or wrong please? , if wrong, what needs to be done to fix it? thanks in advance.

www.electriciansforums.net

 

[MFS Electrical]

View attachment 112397

Things wrong in this picture;

1. Basic insulation showing (meter cabs are not considered suitable enclosures) interestingly site applied insulation (heat shrink) is no longer classed as suitable in an application like this either.

2. Black being used as the N (personally don’t see a problem with it and I’m not aware of any regs which explicitly state black cannot be used as a neutral) but the NICEIC ran a campaign to “de-neutralise” the black. Bigger problem IMO is no sleeving to identify it as a neutral.

3. Difficult to tell from just a photo but that doesn’t appear to be a 25mm SWA and the cut-out says 100A fuse fitted. So OCPD is too large for cable.

4. Whilst not a 7671 reg most DNOs/DSOs specify that meter tails can only use the cutout fuse as an OCPD where the tails are less than 3 metres.

5. SWA braid is not earthed.

6. SWA is not terminated correctly.

 

[MFS Electrical]

Or not as the case might be.

Think there was a debate previously on the forum as to whether a meter box is considered an enclosure because it is lockable (don't laugh) and a key is needed!

According to NICEIC and Select it isn’t classed as a suitable enclosure as non-skilled persons access the enclosure regularly/to read the meter etc.

 

[MFS Electrical]

It maybe at the other end.

Still not done properly though, pretty bad practice earthing the armour from the far end of the circuit.
Zs of the braid would be significantly higher.
And installed contrary to manufacturer’s instructions.

 

[westward10]

@Penguin are you asking to see if we know or because you want to know?

 

[buzzlightyear]

Difficult to tell from just a photo but that doesn’t appear to be a 25mm SWA and the cut-out says 100A fuse fitted. So OCPD is too large for cable

3x 16m showing on pic.lash up job.
Seeing with my big eyes.

 

[littlespark]

I hope we haven’t just done someone’s homework for them…..

 

[pc1966]

Glanding the cable to a metal fused-switch like the Wylex ones would have been far better, then double insulated tails to the meter.

It looks like the "filler" insulation around the 3 cores has been clamped or similar - wonder how that dent happened?

 

[Penguin]

@Penguin are you asking to see if we know or because you want to know?

I could only muster up 5 issues, but apparently there’s a 6th.!
So I opened up the challenge to you guys.

 

[SJD]

I'm not seeing any strain relief on the SWA cable.

 

[buzzlightyear]

I could only muster up 5 issues, but apparently there’s a 6th.!
So I opened up the challenge to you guys.

What is it pick your brain time game.
I'm glad it Xmas, what time is blanket blank on.

 

[littlespark]

What is it pick your brain time game.
I'm glad it Xmas, what time is blanket blank on.

Last night, buzz… with such intellectuals as rob Beckett and Gemma Collins on the celebrity panel.

 

[Penguin]

Last night, buzz… with such intellectuals as rob Beckett and Gemma Collins on the celebrity panel.

Looking forward to the annual Xmas rerun of ‘Morecomb and Wise’ Christmas special.

 

[Penguin]

@Penguin are you asking to see if we know or because you want to know?

Because I want to know.

@Penguin are you asking to see if we know or because you want to know?

 

[buzzlightyear]

Looking forward to the annual Xmas rerun of ‘Morecomb and Wise’ Christmas special.

I'm looking Forward to the two rodneys down the pub, so it's good night from him
sliding under the table.

 

[littlespark]

Morcombe and Wise, Two Ronnies???

Might I direct you fine gentlemen to another thread….

Littlesparks advent 2023

Something a little different this year…. Not that I’m running out of songs… but I thought this might cheer a few folk up. classic comedy sketches from either Christmas editions of shows, or something nostalgic that is always shown on tv at this time of year. First up…. The absolute kings…… it...

www.electriciansforums.net

 

[Penguin]

Glanding the cable to a metal fused-switch like the Wylex ones would have been far better, then double insulated tails to the meter.

It looks like the "filler" insulation around the 3 cores has been clamped or similar - wonder how that dent happened?View attachment 112405

Didn’t even see that dent/damage.
Looking at the size of the damage, it could have possibly been some sought of over tightened Earth strap? (But why)? I’ve run out of idea.

Merry Xmas

 

[ipf]

I'm looking Forward to the two rodneys down the pub, so it's good night from him
sliding under the table.

Only Fools and Rodneys???

Morcombe and Wise, Two Ronnies???

Might I direct you fine gentlemen to another thread….

Morecambe........which one is buzz?

 

[buzzlightyear]

Norman wisdom films me loves.

 

[GBDamo]

The earth tag does not match the template laid out in BS7671.

The text should read,

"Safety Electrical Connection, Do Not Remove"

Not,

"Safety Electrical Earth, Do Not Remove"

I'd also argue the Hepworth branding should not be there and the standard Earth pictogram is not used.

Pedantic, yes, but it is a noncompliance.

 

[DefyG]

mmm! not so sure Id agree it as a non-compliance, Isn't there a passage in the regs that says "alternative 'systems/methods' etc shall not be precluded as long as safety isn't impaired" (or something like that as I Don't have regs book to hand )?

Alternative wording/pictograms hardly impairs safety and message is clear enough!

 

[GBDamo]

mmm! not so sure Id agree it as a non-compliance, Isn't there a passage in the regs that says "alternative 'systems/methods' etc shall not be precluded as long as safety isn't impaired" (or something like that as I Don't have regs book to hand )?

Alternative wording/pictograms hardly impairs safety and message is clear enough!

OK so I was clutching at straws but it is the kind of thing examiners include solely to stop people getting full marks.

 

[marconi]

I am no expert on the regulations but wondered whether the sixth item is that the main equipotential bonding is done remote from the cutout location.

The according to the book ‘rule abiding‘ installation should have the earth conductor from the incoming N in the cutout going only a short distance to the main earth terminal bar, and then from this bar runs a cpc conductor to the dist boards, and separate EP bonding conductors for say water and gas connected also to the bar as in this figure.

With this scheme the cpc wiring and EP wiring do not share one conductor which might be considered a possible single point of failure. Just musing….

 

[mainline]

I am no expert on the regulations but wondered whether the sixth item is that the main equipotential bonding is done remote from the cutout location.

The according to the book ‘rule abiding‘ installation should have the earth conductor from the incoming N in the cutout going only a short distance to the main earth terminal bar, and then from this bar runs a cpc conductor to the dist boards, and separate EP bonding conductors for say water and gas connected also to the bar as in this figure.

With this scheme the cpc wiring and EP wiring do not share one conductor which might be considered a possible single point of failure. Just musing….

View attachment 112486

They replaced meter tails with SWA making the MET remote.
We don't know how the swa terminates or if it is downstream fused.
A bit of a botch, whatever way you look at it.

A Spn fused connection unit would have been the way, but even then could cause a moan from the dno for using the meter cabinet.

 

[marconi]

Just spotted there is a wiring fault in the figure I copied and posted in my #34.

 

[westward10]

Just spotted there is a wiring fault in the figure I copied and posted in my #34.

Polarity is incorrect from the meter to the consumer unit

 

[GBDamo]

Polarity is incorrect from the meter to the consumer unit

I'm not sure the polarity is wrong, but probably the tails are incorrectly identified.

Many meters have L-N-N-L terminal lay-out.

Whichever though, its not correct.

 

[westward10]

I'm not sure the polarity is wrong, but probably the tails are incorrectly identified.

Many meters have L-N-N-L terminal lay-out.

Whichever though, its not correct.

You are correct, Marconi got his crayons mixed up

 

[mainline]

 

[marconi]

You are correct, Marconi got his crayons mixed up

If only it was just my crayons......

 

[Simon47]

I am no expert on the regulations but wondered whether the sixth item is that the main equipotential bonding is done remote from the cutout location.

The according to the book ‘rule abiding‘ installation should have the earth conductor from the incoming N in the cutout going only a short distance to the main earth terminal bar, and then from this bar runs a cpc conductor to the dist boards, and separate EP bonding conductors for say water and gas connected also to the bar as in this figure.

With this scheme the cpc wiring and EP wiring do not share one conductor which might be considered a possible single point of failure. Just musing….

View attachment 112486

I'd suggest the opposite.
Suppose you lose the connection between MET and CU ? Your bonding is now probably via the 0.75mm flex to the boiler. By running a connection direct from service head to CU and also taking your bonding cables to the CU, you've eliminated two connections and reduced the risk of incomplete/ineffective bonding.

 

[baldelectrician]

I do like these meters with the integrated isolator built in

I actually suggested (to SELECT) about 16 years ago when they were involved in the consultation for smart meters that these new meters should have a built in isolator

The feedback- it was refused as it would cost an extra £6 per meter.

 

[freddo]

The feedback- it was refused as it would cost an extra £6 per meter.

This is why experienced engineers should be making the regulations not brain dead office staff. Surely a separate isolator in an enclosure and the extra time required to fit it would add up to more than £6?!

 

[Simon47]

I can't help thinking the meters are an example of "a camel being a horse designed by committee"