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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Main eq bond
http://i61.tinypic.com/72stmr.jpg
Woopee it's a clamp. It's now in the right place. But I am impressed I'm getting immeasurably small resistance readings everywhere, including right back to the bathroom basin taps (0.04 Ohms) from the main earth terminal. This is measured with a Megger 1552 and a bloody long wander lead, nulled. Trouble with such measurements though is as soon as you cough on the banana plugs, you shift 30mOhms off calibration. But anyway, pleased with that. Especially as the copper pipes are not yet continuous through the house so there are bonding links bridging the gaps for now. |
#2
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Main eq bond
"Tim Watts" wrote in message
... http://i61.tinypic.com/72stmr.jpg Woopee it's a clamp. It's now in the right place. But I am impressed I'm getting immeasurably small resistance readings everywhere, including right back to the bathroom basin taps (0.04 Ohms) from the main earth terminal. Is this ADS or EEBAD:-)? -- Adam |
#3
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Main eq bond
On Sat, 22 Nov 2014 16:12:17 -0000, Tim Watts wrote:
http://i61.tinypic.com/72stmr.jpg Woopee it's a clamp. It's now in the right place. But I am impressed I'm getting immeasurably small resistance readings everywhere, including right back to the bathroom basin taps (0.04 Ohms) from the main earth terminal. This is measured with a Megger 1552 and a bloody long wander lead, nulled. Trouble with such measurements though is as soon as you cough on the banana plugs, you shift 30mOhms off calibration. But anyway, pleased with that. Especially as the copper pipes are not yet continuous through the house so there are bonding links bridging the gaps for now. What are you doing? Using an old valve radio that needs amazing earths? -- What comes after 69? Mouthwash. |
#4
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Main eq bond
On 22/11/14 16:31, ARW wrote:
"Tim Watts" wrote in message ... http://i61.tinypic.com/72stmr.jpg Woopee it's a clamp. It's now in the right place. But I am impressed I'm getting immeasurably small resistance readings everywhere, including right back to the bathroom basin taps (0.04 Ohms) from the main earth terminal. Is this ADS or EEBAD:-)? The former now isn't it? Pretty sure it was EEBADS when I did my exam. I'm not big on names, especially when they change just to mean the same thing! So here goes: "Live wire, phase, earth bond, bulb, " That should give a few people apoplexy ;-) On a serious note - I am very much against the continual changing of nomenclature for the sake of it which we seem to get a lot of these days... My water pipe has a main equipotential bond to the main earth terminal. So we might as well say it's earth-bonded. 90% of regular people at least know what that means. The other 10% would shove the wire into a pot plant on the window cill. "PIR" was easy to say. Does anyone ask for an "EICR"? I was trying to find a numerous picture of the earth wire thing. But I found this instead: http://www.dailymail.co.uk/news/arti...-cannabis.html WTF? I did not know weed could do that (even superstrenghth weed). |
#5
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Main eq bond
On 22/11/2014 16:52, Tim Watts wrote:
On 22/11/14 16:31, ARW wrote: "Tim Watts" wrote in message ... http://i61.tinypic.com/72stmr.jpg Woopee it's a clamp. It's now in the right place. But I am impressed I'm getting immeasurably small resistance readings everywhere, including right back to the bathroom basin taps (0.04 Ohms) from the main earth terminal. Is this ADS or EEBAD:-)? The former now isn't it? Pretty sure it was EEBADS when I did my exam. I'm not big on names, especially when they change just to mean the same thing! Although to be fair, its a bit more than just a name change... with ADS one can forgo most of the supplementary EQ bonding. So here goes: "Live wire, phase, earth bond, bulb, " That should give a few people apoplexy ;-) nope, not biting ;-) On a serious note - I am very much against the continual changing of nomenclature for the sake of it which we seem to get a lot of these days... My water pipe has a main equipotential bond to the main earth terminal. So we might as well say it's earth-bonded. 90% of regular people at least know what that means. The other 10% would shove the wire into a pot plant on the window cill. Indeed they will. The only problem with the nomenclature is that is actually makes understanding the reason for its existence a bit more difficult. If you can keep the concepts of earthing and EQ bonding separate in your mind, the whole point that they do different things (limit the duration of a shock, vs limit its magnitude), by different mechanisms (opening a CPD with a fault current Vs limit potential difference) is much easier to get a grip on I find. "PIR" was easy to say. Does anyone ask for an "EICR"? Yup agreed it does not add much. I suppose the fact that the P was not necessarily actually true is what sank that one. I was trying to find a numerous picture of the earth wire thing. But I found this instead: http://www.dailymail.co.uk/news/arti...-cannabis.html WTF? I did not know weed could do that (even superstrenghth weed). That last photo in particular looks fairly scary... still I suppose the power was off by then! -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#6
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Main eq bond
On 22/11/14 19:27, John Rumm wrote:
"Live wire, phase, earth bond, bulb, " That should give a few people apoplexy ;-) nope, not biting ;-) :- On a serious note - I am very much against the continual changing of nomenclature for the sake of it which we seem to get a lot of these days... My water pipe has a main equipotential bond to the main earth terminal. So we might as well say it's earth-bonded. 90% of regular people at least know what that means. The other 10% would shove the wire into a pot plant on the window cill. Indeed they will. The only problem with the nomenclature is that is actually makes understanding the reason for its existence a bit more difficult. If you can keep the concepts of earthing and EQ bonding separate in your mind, the whole point that they do different things (limit the duration of a shock, vs limit its magnitude), by different mechanisms (opening a CPD with a fault current Vs limit potential difference) is much easier to get a grip on I find. I agree with that - it's just that folk who work with it will know that anyway - but ordinary folk just get more confused. "PIR" was easy to say. Does anyone ask for an "EICR"? Yup agreed it does not add much. I suppose the fact that the P was not necessarily actually true is what sank that one. I was trying to find a numerous picture of the earth wire thing. But I found this instead: http://www.dailymail.co.uk/news/arti...-cannabis.html WTF? I did not know weed could do that (even superstrenghth weed). That last photo in particular looks fairly scary... still I suppose the power was off by then! |
#7
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Main eq bond
On Sat, 22 Nov 2014 19:27:49 +0000, John Rumm
wrote: On 22/11/2014 16:52, Tim Watts wrote: On 22/11/14 16:31, ARW wrote: "Tim Watts" wrote in message ... http://i61.tinypic.com/72stmr.jpg Woopee it's a clamp. It's now in the right place. But I am impressed I'm getting immeasurably small resistance readings everywhere, including right back to the bathroom basin taps (0.04 Ohms) from the main earth terminal. Is this ADS or EEBAD:-)? The former now isn't it? Pretty sure it was EEBADS when I did my exam. I'm not big on names, especially when they change just to mean the same thing! Although to be fair, its a bit more than just a name change... with ADS one can forgo most of the supplementary EQ bonding. So here goes: "Live wire, phase, earth bond, bulb, " That should give a few people apoplexy ;-) nope, not biting ;-) On a serious note - I am very much against the continual changing of nomenclature for the sake of it which we seem to get a lot of these days... My water pipe has a main equipotential bond to the main earth terminal. So we might as well say it's earth-bonded. 90% of regular people at least know what that means. The other 10% would shove the wire into a pot plant on the window cill. Indeed they will. The only problem with the nomenclature is that is actually makes understanding the reason for its existence a bit more difficult. If you can keep the concepts of earthing and EQ bonding separate in your mind, the whole point that they do different things (limit the duration of a shock, vs limit its magnitude), by different mechanisms (opening a CPD with a fault current Vs limit potential difference) is much easier to get a grip on I find. "PIR" was easy to say. Does anyone ask for an "EICR"? Yup agreed it does not add much. I suppose the fact that the P was not necessarily actually true is what sank that one. I was trying to find a numerous picture of the earth wire thing. But I found this instead: http://www.dailymail.co.uk/news/arti...-cannabis.html WTF? I did not know weed could do that (even superstrenghth weed). That last photo in particular looks fairly scary... still I suppose the power was off by then! We still take are cars for an MOT test even though the MOT was abolished in 1970. I dare say some people still refer to the electrical regs as IEE There must be other historical agencys that are still around through common usage. -- Graham. %Profound_observation% |
#8
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Main eq bond
On 22/11/14 20:21, Graham. wrote:
We still take are cars for an MOT test even though the MOT was abolished in 1970. I dare say some people still refer to the electrical regs as IEE That was a silly name change IMO - "THe Institute of Electrical Engineers" is a very old name and caries quite some weight. There must be other historical agencys that are still around through common usage. You have still buy "Type 1 MoT" at builder's merchants. People will still talk about the "D(H)SS" even though that agency has not existed for over a decade. Bombay? |
#9
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Main eq bond
On 22/11/2014 20:28, Tim Watts wrote:
On 22/11/14 20:21, Graham. wrote: We still take are cars for an MOT test even though the MOT was abolished in 1970. I dare say some people still refer to the electrical regs as IEE That was a silly name change IMO - "THe Institute of Electrical Engineers" is a very old name and caries quite some weight. Main problem I guess was confusion with the IEEE There must be other historical agencys that are still around through common usage. You have still buy "Type 1 MoT" at builder's merchants. People will still talk about the "D(H)SS" even though that agency has not existed for over a decade. Bombay? Potato - yum ;-) -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#10
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Main eq bond
Tim Watts wrote:
On 22/11/14 20:21, Graham. wrote: We still take are cars for an MOT test even though the MOT was abolished in 1970. I dare say some people still refer to the electrical regs as IEE That was a silly name change IMO - "THe Institute of Electrical Engineers" is a very old name and caries quite some weight. As a member at the time, I was never convinced that it was a good idea. Chris -- Chris J Dixon Nottingham UK Plant amazing Acers. |
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