Block of 200+ flats, eleven single channel hot water timers blown this week alone.

[Fender]

There's some really clever people on this forum. I had to Google the electronic references, and, after reading them for a few minutes, I realised I was mentally debating tea or coffee to start the day (I went for tea).

So I can't help you there. But I will try to using my old favourite, Ockhams Razor ie go for the bleeding obvious.

Lights flickering, different flats affected, electronic gizmos feeling unwell (my knowledge of such things shines). And all about the same time.

It stinks of a neutral connection. It's the only common denominator. I can't see 11 Sangamo clocks packing up at the same time (Greenbrook, maybe..)

I was (un)lucky enough to see a neutral on a three phase supply go AWAL first hand ('tis a long story) and it is frightening. Voltage between phase and (apparent) neutral 270. Nope, 370. Nope 300. Nope 280 etc. Modular fittings jumping up in the suspended ceiling. Vending machines dying in agony.

Ok, this was for a period of minutes. Bit it's proof that the voltage goes crazy with a naughty neutral. It may be the case that your neutral was just a bit cheeky and went missing for a second or so.

One to watch out for.

 

[roper_ni]

There's some really clever people on this forum. I had to Google the electronic references, and, after reading them for a few minutes, I realised I was mentally debating tea or coffee to start the day (I went for tea).

So I can't help you there. But I will try to using my old favourite, Ockhams Razor ie go for the bleeding obvious.

Lights flickering, different flats affected, electronic gizmos feeling unwell (my knowledge of such things shines). And all about the same time.

It stinks of a neutral connection. It's the only common denominator. I can't see 11 Sangamo clocks packing up at the same time (Greenbrook, maybe..)

I was (un)lucky enough to see a neutral on a three phase supply go AWAL first hand ('tis a long story) and it is frightening. Voltage between phase and (apparent) neutral 270. Nope, 370. Nope 300. Nope 280 etc. Modular fittings jumping up in the suspended ceiling. Vending machines dying in agony.

Ok, this was for a period of minutes. Bit it's proof that the voltage goes crazy with a naughty neutral. It may be the case that your neutral was just a bit cheeky and went missing for a second or so.

One to watch out for.

Have never seen that happen, don't know what supply type is being used over here we use TT

There's some really clever people on this forum. I had to Google the electronic references, and, after reading them for a few minutes, I realised I was mentally debating tea or coffee to start the day (I went for tea).

So I can't help you there. But I will try to using my old favourite, Ockhams Razor ie go for the bleeding obvious.

Lights flickering, different flats affected, electronic gizmos feeling unwell (my knowledge of such things shines). And all about the same time.

It stinks of a neutral connection. It's the only common denominator. I can't see 11 Sangamo clocks packing up at the same time (Greenbrook, maybe..)

I was (un)lucky enough to see a neutral on a three phase supply go AWAL first hand ('tis a long story) and it is frightening. Voltage between phase and (apparent) neutral 270. Nope, 370. Nope 300. Nope 280 etc. Modular fittings jumping up in the suspended ceiling. Vending machines dying in agony.

Ok, this was for a period of minutes. Bit it's proof that the voltage goes crazy with a naughty neutral. It may be the case that your neutral was just a bit cheeky and went missing for a second or so.

One to watch out for.

Must say that have never seen that happen, the reason that said about the Megger i

 

[pc1966]

Have never seen that happen, don't know what supply type is being used over here we use TT

The TT or TN supply type won't make any difference to equipment damage if you have an neutral fault on a 3-phase group of circuits. What is more likely to make a difference to the stats is the types of cable/joints used that might alter just how common such a fault is.

Oh and the number of scroats stealing neutral links from sub-stations...

However at least with TT you don't have the open PEN risk for TN-C-S elevating external metalwork to tens or hundreds of volts...

 

[nicebutdim]

over here we use TT

Was that a typo?

 

[GBDamo]

Final update.

First thing, we have plague in the house so this may be my last post. We have one positive test and I'm fairly sure I've got it now, did my test this morning.

Interestingly my missus who, is a double jabbed devotee, is in bed (three days now) with it after catching it on a camping trip.

What exactly does this vaccine do?

-*-

Anyway had a chat with the contact at the flats this morning and to be honest I'm befuddled by her explanation.

They have had the situation looked at and resolved. Apparently it was "some flat plugging in too many appliances and burnt out a fuse and some wires"

I find this highly implausible.

Any overload should have been dealt with by the OCPDs in the flats and not downstream. Unless the design of the installation was seriously FUBAR.

More likely they got the installers back in to check it over and they've tightened up their loose neutrals.

 

[DPG]

Final update.

First thing, we have plague in the house so this may be my last post. We have one positive test and I'm fairly sure I've got it now, did my test this morning.

Interestingly my missus who, is a double jabbed devotee, is in bed (three days now) with it after catching it on a camping trip.

What exactly does this vaccine do?

-*-

Anyway had a chat with the contact at the flats this morning and to be honest I'm befuddled by her explanation.

They have had the situation looked at and resolved. Apparently it was "some flat plugging in too many appliances and burnt out a fuse and some wires"

I find this highly implausible.

Any overload should have been dealt with by the OCPDs in the flats and not downstream. Unless the design of the installation was seriously FUBAR.

More likely they got the installers back in to check it over and they've tightened up their loose neutrals.

Thanks for the update.

Hope the Covid doesn't get you too bad. I know some people who were affected for months.

Don't forget the vaccine is not 100% effective - no vaccine is.

 

[littlespark]

The vaccine stops you from being as ill as you would without it.
Can still get COVID, but not as severe.

“severe” being in ICU
“not severe” is being laid up in a bed a few days.

 

[nicebutdim]

What makes little sense is the different rules about self isolation between people who have been vaccinated and people who have not - both can spread it around and I doubt it would be of little comfort to those ending up severly ill to know that the person they caught it from had been vaccinated.

 

[Mike Johnson]

Double vaccinated before I went to France three week ago, impossible to get a PCR test before I left my area, six different test laboratories refused to give me a test without an appointment, not much good as they only had appointments two weeks hence, went into Calais and had a test while I waited, all of this took hours, my normal six hour journey turned into thirteen and a half hours, the rules at Calais are very strict on the tests, at the UK side they did not want to see any documentation, just my passport, seems the French side is more strict than the UK side, hence letting all those FIFA people in without any checks, seems to be daft to me.

 

[LukeD]

Final update.

First thing, we have plague in the house so this may be my last post. We have one positive test and I'm fairly sure I've got it now, did my test this morning.

Interestingly my missus who, is a double jabbed devotee, is in bed (three days now) with it after catching it on a camping trip.

What exactly does this vaccine do?

-*-

Anyway had a chat with the contact at the flats this morning and to be honest I'm befuddled by her explanation.

They have had the situation looked at and resolved. Apparently it was "some flat plugging in too many appliances and burnt out a fuse and some wires"

I find this highly implausible.

Any overload should have been dealt with by the OCPDs in the flats and not downstream. Unless the design of the installation was seriously FUBAR.

More likely they got the installers back in to check it over and they've tightened up their loose neutrals.

SKunk farm ? Anyway , i would like to know how their explanation would cause this issue (From a learning perspective )