vacuum_tubes
pfm Member
Another thread that highlights why any discussion of altering or messing with mains electricity should be banned in the AUP.
Mains IEC Connectors, I never realised !!
- Thread starter IWC Doppel
- Start date
Nah you dont get it, there's a witchhunt going on here for something that isn't happening.
Nobody is altering or messing with mains electricity.
Who mentioned cheapo flex cable Martin? You guys need to find out what is actually happening before you conduct these witch hunts. If 30ma leaks from live to neutral the RCCB in the box will trip out. Nowhere is 64 amps going through cheapo mains flex cable, and all of the equipment being powered is double insulated.
martin clark
pinko bodger
I don't think that's true, at all.
There's a duty of care to protect people from idiocy; and that means - not necessarily , the idiot.
martin clark
pinko bodger
You really, really, have not thought this through. Nor all the possible fault conditions.
We are also talking , about the flex cables themselves.
Who mentioned cheapo flex cable Martin? You guys need to find out what is actually happening before you conduct these witch hunts. If 30ma leaks from live to neutral the RCCB in the box will trip out. Nowhere is 64 amps going through cheapo mains flex cable.
So now you're calling me an idiot and you still haven't asked what is actually happening.
martin clark
pinko bodger
@thommy - I am definitely not calling you an idiot.
I was responding to a very-well-meant post by another, that I slightly disagree with.
This is not about 'you', at all. I don't think you are an idiot! I just hope you realise the potential ramifications of some of what you appear to assume / how it appears in partial disclosure so far. You've a bunch of DIY mains conditioners, on a lead, for which you've separately -derived an Earth Bond, sorry - your own earth stake. Of undefined impedance.
-that's a flex.
Maybe you'll post a full schematic, and the Pros here* will be re-assured. Maybe.
(* I'm not one, I just have ... a very-well-developed understanding, from working closely /with/ pros, inc medical electronics)
I was responding to a very-well-meant post by another, that I slightly disagree with.
This is not about 'you', at all. I don't think you are an idiot! I just hope you realise the potential ramifications of some of what you appear to assume / how it appears in partial disclosure so far. You've a bunch of DIY mains conditioners, on a lead, for which you've separately -derived an Earth Bond, sorry - your own earth stake. Of undefined impedance.
-that's a flex.
Maybe you'll post a full schematic, and the Pros here* will be re-assured. Maybe.
(* I'm not one, I just have ... a very-well-developed understanding, from working closely /with/ pros, inc medical electronics)
vacuum_tubes
pfm Member
Nope, once the post is made it's up there. Would be quite easy for someone to come along in 6 months not read the entire thread and then acquire a Darwin award.
Somafunk
pfm Member
Personal and close to home for myself, literally and figuratively as my gran was related to Jean Ferguson (her husband bought Glenlair house - home of James Clerk Maxwell) so I often spent time there running around as a kid and absorbed talk about Maxwell from my grandad who was a marine engineer in the 2nd world war then went onto be head engineer for the Galloway hydro scheme in SW Scotland based at Tongland in one of the hydro scheme cottages, I lived less than half a mile away from them so I was always hanging around and getting in the way as kids are prone to do
, needless to say I was in awe of the massive turbines he kept serviced and the intricacies of the hydro scheme was such an eye opener to a kid there’s no wonder I did electronic/mechanical engineering at uni
Somafunk
pfm Member
Until we have a period of dry weather and the soil/earth dries out and increases resistance above the ideal 1ohm to 5ohms for a consumer earth rod but certainly less than current absolute max value of 100ohms, go on………lick the casing of your mains conditioner in a long dry summer.
****do not do this***
(I think you needed telling)
Did you assess the soils resistivity beforehand?, did you use an earth enhancing compound in your hole?………you did dig a hole beforehand didn’t you?…..no?……go back to the beginning - you should really examine the substrate you are driving the 6ft earth rod into for suitability, have you since taken any resistance readings? - no?….go back to the beginning, I trust you have recorded these readings?, if so then what are they?.
martin clark
pinko bodger
...last time 'we' (project team) had a sub -1 ohm local earth impedance mat requirement* - it also took >100m of driven, 100mm casing - and that in 'good' wet clay soils in S Bristol.
A simple 'earth spike' is for the birds; 4-6ft of driven spike is going to be c 100ohms , at very best, in conducive soils in UK. No doubt @Somafunk can speak to much more detail there!
[* for the HV:LV substation; the permanent V20, quad-turbo 2.5MW backup up genny that was, &remains! also grid-tied as part of that project - sounded bloody amazing on full-load test; exceeded spec too: 0 to full output on test, <10s!]
A simple 'earth spike' is for the birds; 4-6ft of driven spike is going to be c 100ohms , at very best, in conducive soils in UK. No doubt @Somafunk can speak to much more detail there!
[* for the HV:LV substation; the permanent V20, quad-turbo 2.5MW backup up genny that was, &remains! also grid-tied as part of that project - sounded bloody amazing on full-load test; exceeded spec too: 0 to full output on test, <10s!]
Craig B
Re:trophile
I wish @Robert still had his photos up of his makeshift hi-fi mains lead running off the pants press down the hall, via an electric drill on full tilt along the way, plus a few other odds and sods (toaster? microwave oven? drinks blender?). Think he did a couple of with/without recordings. This, from back before the internet police (i.e. Google ads) decided that they should be the ultimate arbitrator when it comes to who's IP should be allowed to be shared online.
Somafunk
pfm Member
I imagine your sub <1ohm requirements were backed up by application of the official “lick” test and recorded for officialdom
I believe current regs recommend an absolute max of 200ohms but I have a suspicion this has been amended to 100ohms (with a teeny bit of allowable variance for a Friday afternoon job)
martin clark
pinko bodger
^ it was all about the new 11Kv HV : LV 2-3MVA transformer on-site
Lick- it ? - No thanks, too fizzy for me !
ETA - let's return this to normal pfm good humour:
At one early point , that project was going to have two independant transformers; i.e. dual-mono, in a stand-alone energy centre - and I (as architect) ..well obvs it was all going to be a certain Olive colour, because the total requirement inc HV:LV switch and a few other bits&bobs - then, exactly suited proportions of the classic Hicap box - when scaled -up to 3.2m high : D.
Got consents on that basis but - never got built-out that way. Sigh.
Lick- it ? - No thanks, too fizzy for me !
ETA - let's return this to normal pfm good humour:
At one early point , that project was going to have two independant transformers; i.e. dual-mono, in a stand-alone energy centre - and I (as architect) ..well obvs it was all going to be a certain Olive colour, because the total requirement inc HV:LV switch and a few other bits&bobs - then, exactly suited proportions of the classic Hicap box - when scaled -up to 3.2m high : D.
Got consents on that basis but - never got built-out that way. Sigh.
Somafunk
pfm Member
^ it was all about the new 11Kv HV : LV 2MVA transformer on site
Lick- it ? - No thanks, too fizzy for me
Wuss, what’s wrong with a tingly top end?
You see……..this earth rod bollocks is the final nail in the coffin (quite possibly) so to speak and the natural conclusion of that very first experiment with a “synergistic research purple fuse” bought from PFM classifieds, so in a way this site is akin to a “pusher”. I’ll say one thing for the earth rod idea - it’s a damn site cheaper than a flight and weekend away at dignitas
I used to lie on top of these turbines as a kid, total of 15,000+hp underneath me with an 11000kW of tingle juice,
File:Tonglandturbinehall.jpg - Wikimedia Commons
sq225917
Bit of this, bit of that
@Craig B, ah the zero gain forum test.
I believe we listened to samples of keys, coat hanger, kit kat wrapper, a potato and richer sounds freebie red and white.
And statistically, they all sounded the same.
‐------------------------------------------------------------
For about ten years I used silver wattgates, silver mk's, hubble plugs, all linked with 3mm solid silver mains cables. Made bugger all difference when replaced with literal kettle leads. Maybe I went deaf during that time. What certainly didn't happen was that my hifi got worse. Funnily enough every component got about 10db better in pretty much every noise and distortion measurement.
I believe we listened to samples of keys, coat hanger, kit kat wrapper, a potato and richer sounds freebie red and white.
And statistically, they all sounded the same.
‐------------------------------------------------------------
For about ten years I used silver wattgates, silver mk's, hubble plugs, all linked with 3mm solid silver mains cables. Made bugger all difference when replaced with literal kettle leads. Maybe I went deaf during that time. What certainly didn't happen was that my hifi got worse. Funnily enough every component got about 10db better in pretty much every noise and distortion measurement.
Flyingorthopod
Active Member
But might stop your installation killing you, your family, and everyone else in your substation supply if you are TNC and a supply neutral fault develops and your new earth becomes the neutral line for the whole postcode.
Suggest getting it checked by an electrician.
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