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Gribble *******
Joined: 11 Oct 2007 Posts: 8448 Location: Holset H221W
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Posted: Mon Jan 24, 2011 23:52 Post subject: |
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16 or 24 lbs ? |
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Google Sponsor
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Posted: Mon Jan 24, 2011 23:52 Post subject: Google Ads keep this community free to join! |
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marcus 06 **
Joined: 27 Feb 2010 Posts: 96 Location: france
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Posted: Tue Jan 25, 2011 20:58 Post subject: |
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I normally start small then move up and get more brutal. |
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MikT725 *****
Joined: 16 Nov 2008 Posts: 684 Location: West Yorkshire
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Posted: Tue Jan 25, 2011 21:10 Post subject: |
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Just be very careful 240V shocks hurt but dont normally kill that often a 415V shock is less common, you have to get yourself between 2 phases, but is much more likely to stop your ticker, my advice always work dead, always test before working (never take someones word for it) and if in doubt get some one who knows what they're doing, advice from an electrician.
What is the job ? _________________ 1999 3.1td SWB Trooper. RIP
2004 3.1td LWB
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tormod *
Joined: 19 Dec 2010 Posts: 27 Location: Scotland
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Posted: Tue Jan 25, 2011 21:43 Post subject: |
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A phase to phase fault (line to line) when you are creating the fault (a short circuit) and the resulting current is flowing through you will almost invariably result in severe burns and heart problems at best; but much more likely a fatality.
Such work should never be undertaken LIVE with a line to neutral (star point) voltage of 240 V and absolutely NOT on a line to line voltage of 415V.
Why anyone would undertake such work live is demonstrating nothing other than your inexperience and your distinct lack of kowledge and respect of the energy levels you are dealing with. Isolate and fault find on dead systems even at line to neutral (ground/ earth) voltages of 240V and especially at any voltage higher than that. |
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Gribble *******
Joined: 11 Oct 2007 Posts: 8448 Location: Holset H221W
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Posted: Tue Jan 25, 2011 22:01 Post subject: |
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Tormond wrote - Posted: Tue Jan 25, 2011 20:43 Post subject:
--------------------------------------------------------------------------------
A phase to phase fault (line to line) when you are creating the fault (a short circuit) and the resulting current is flowing through you will almost invariably result in severe burns and heart problems at best; but much more likely a fatality.
Such work should never be undertaken LIVE with a line to neutral (star point) voltage of 240 V and absolutely NOT on a line to line voltage of 415V.
Why anyone would undertake such work live is demonstrating nothing other than your inexperience and your distinct lack of kowledge -Knowledge ?
Thank you for you post but I am currently in possesion of a current PTS sentinel card for open line working DC & AC up to and including overheads 22,000 volts and LUL Track Competent - thats the one where the lookout blows the whistle and you get 12 seconds or so to jump over 3 sets of live positive and negative traction rails to get to the refuge before the train comes which in case you didnt know is how work on the London Underground is done outside of engineering hours .
How would you find a 3 phase motor overload fault then and what use are currrent clamp meters then ? Or do you advocate turning off the power each time to relocate the clamp ? |
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MikT725 *****
Joined: 16 Nov 2008 Posts: 684 Location: West Yorkshire
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Posted: Tue Jan 25, 2011 22:17 Post subject: |
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tormod wrote: |
A phase to phase fault (line to line) when you are creating the fault (a short circuit) and the resulting current is flowing through you will almost invariably result in severe burns and heart problems at best; but much more likely a fatality.
Such work should never be undertaken LIVE with a line to neutral (star point) voltage of 240 V and absolutely NOT on a line to line voltage of 415V.
Why anyone would undertake such work live is demonstrating nothing other than your inexperience and your distinct lack of kowledge and respect of the energy levels you are dealing with. Isolate and fault find on dead systems even at line to neutral (ground/ earth) voltages of 240V and especially at any voltage higher than that. |
Thats what i said, BUT sometimes you have to work live to fault find especially on industrial machinery (by working live i mean taking measurements etc not connecting and disconnecting) how can you find if there is a voltage drop etc with the power off ?
Also when a person is creating a fault it is not a short circuit a short is when there is direct contact beween 2 phases, phase and neutral or phase and earth hence why circuit breakers and fuses dont protect people from direct contact. _________________ 1999 3.1td SWB Trooper. RIP
2004 3.1td LWB
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tormod *
Joined: 19 Dec 2010 Posts: 27 Location: Scotland
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Posted: Tue Jan 25, 2011 23:54 Post subject: |
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Fine!
I accept all that's been stated. But I also restate that unless you have the knowledge and experience or in other words, the competence NEVER undertake live system testing. Even when you have such competence the default condition should always be to work on DEAD systems if at all possible.
There are always specialists that require to do work that will kill the uninitiated but these people fall into a very unique group of individuals.
The general rule for all is if you can isolate the energy source, be that electrical, mechanical, chemical, nuclear, potential and or kinetic, then that is what is required to avoid injury or death.
Common sense is all that is required to preserve wellbeing |
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markymoan *******
Joined: 25 Jun 2005 Posts: 16267 Location: Naughty Step
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Posted: Wed Jan 26, 2011 2:14 Post subject: |
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I should be dead, I used to fix 3 phase pressure washers while wet through and trying to get the spark just right to fire the burner
If you want safe then the USA is for you with 110V _________________ |
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MikT725 *****
Joined: 16 Nov 2008 Posts: 684 Location: West Yorkshire
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Posted: Wed Jan 26, 2011 20:23 Post subject: |
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MikT725 wrote: |
my advice always work dead, always test before working (never take someones word for it) and if in doubt get some one who knows what they're doing |
Advice for someone who is not a competent electrician (no offence Gribble you sound more competent than most working on that sort of gear and i do not wish to ''teach one to suck eggs'')
I am competent and qualified i would say 90 % of the time i have to work live, that means working on dead circuits alongside ones that are still live (the company i work for would not appreciate shutting the entire building down every time i took a cover off a distribution board) and when fault finding the very first test carried out is to verify that you have voltage present, how do you do that dead ? _________________ 1999 3.1td SWB Trooper. RIP
2004 3.1td LWB
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bazza2541 *****
Joined: 23 Jun 2007 Posts: 645 Location: Letterkenny, Donegal.
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Posted: Wed Jan 26, 2011 20:32 Post subject: |
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tormod wrote: |
A phase to phase fault (line to line) when you are creating the fault (a short circuit) and the resulting current is flowing through you will almost invariably result in severe burns and heart problems at best; but much more likely a fatality.
Such work should never be undertaken LIVE with a line to neutral (star point) voltage of 240 V and absolutely NOT on a line to line voltage of 415V.
Why anyone would undertake such work live is demonstrating nothing other than your inexperience and your distinct lack of kowledge and respect of the energy levels you are dealing with. Isolate and fault find on dead systems even at line to neutral (ground/ earth) voltages of 240V and especially at any voltage higher than that. |
Funny enough, I am at it 22 years. I must be the least experienced and knowledgable approved electrician in the world. _________________ Let the big dawg hunt. |
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MikT725 *****
Joined: 16 Nov 2008 Posts: 684 Location: West Yorkshire
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Posted: Wed Jan 26, 2011 20:39 Post subject: |
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Ive only been doing it 12 years, thats my excuse _________________ 1999 3.1td SWB Trooper. RIP
2004 3.1td LWB
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bazza2541 *****
Joined: 23 Jun 2007 Posts: 645 Location: Letterkenny, Donegal.
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Posted: Wed Jan 26, 2011 21:03 Post subject: |
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MikT725 wrote: |
Ive only been doing it 12 years, thats my excuse |
yOU CAN MAKE THE TEA, AND PUT THE TOOLS IN THE VAN. bUT NO PLAYING WITH THE RADIO. _________________ Let the big dawg hunt. |
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bazza2541 *****
Joined: 23 Jun 2007 Posts: 645 Location: Letterkenny, Donegal.
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Posted: Wed Jan 26, 2011 21:04 Post subject: |
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Damn caps lock. Sorry. _________________ Let the big dawg hunt. |
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MikT725 *****
Joined: 16 Nov 2008 Posts: 684 Location: West Yorkshire
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Posted: Wed Jan 26, 2011 21:06 Post subject: |
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F*** that just made me laugh out loud ! ! _________________ 1999 3.1td SWB Trooper. RIP
2004 3.1td LWB
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markymoan *******
Joined: 25 Jun 2005 Posts: 16267 Location: Naughty Step
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Posted: Wed Jan 26, 2011 21:07 Post subject: |
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Can I stick my tongue on the wires to see if it tickles _________________ |
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