Power supplies and safety - Page 2

AndersP · 6th September 2002, 09:11 PM

I´m a swede living in Norway and I know from personal experience that the mains wiring in this country is different from back home in Sweden. It´s a 240V system alright, but it´s 120V in one lead and 120 in the other and the fusebox have two fuses for each cirquit fused. So when I fex. turn the lightswitch off to hang a roof lamp or something one lead is still 120V. Finding this out standing on the top of a ladder, holding a heavy lamp, is not a nice experience! On top of all things, I´ve managed to repeat this more than once.

BTW, alcohol would be a pretty crappy electrolyte wouldn´t it? Suppose beer would make a greater hazard than aquavit in this respect.

jackinnj · 7th September 2002, 01:23 AM

I wonder how they do "ground fault interrupt" receptacles in Norway or Sweden. Pretty much standard gear on this side of the pond.

Seem to be quite a few Scandinavians on this board. I wonder if they appreciate how much Norwegians and Swedes are discussed on the National Public Radio in the US. Of course, I am thinking of Garrison Keilor from whom we learn of the sour herring and stinky cheese and the interesting relationships between the Lutheran and Catholic flock in Lake Wobegone, Minnesota.<p>and of course, the <em> lingua franca</em> in Minnesota is peppered with, what best could be called "Skandineglish"!

stein · 7th September 2002, 04:17 AM

So, to sum up all the advices, use common sense, drink akevitt (That's how it is spelled in norwegian) and use a grounded plug.

Now, as I said I don't have a grounded outlet in my room. Running a wire frm the kitchen is possible, but only a short-term solution (and not a good one for me).

Now, I have a perhaps unorthodox solution to the problem:
I run pretty much everything electric from extension cords with muliple outlets, and they are all with grund plugs. If make an extension cord with only ground connected, plug it into one of these, and run it out the window to an iron pole driven deep (say 1m/3ft)m into the ground. Wouldn't this be sufficient?

As a side note, what would using a dedicated ground like this do to hum loops?

stein · 7th September 2002, 04:55 AM

Replying to myslef

Here's a crude picture of what I suggested above Green is ground

mcp · 7th September 2002, 05:14 AM

Hi AndersP

Seems to me it is a 2 phase electrical system. Is this the standard in Norway? Just curious.

skaara · 7th September 2002, 06:49 AM

There would be difference in potentialbetween mains groung and that ground..

7th September 2002, 01:23 AM	#12
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	On the Akavit again? I wonder how they do "ground fault interrupt" receptacles in Norway or Sweden. Pretty much standard gear on this side of the pond. Seem to be quite a few Scandinavians on this board. I wonder if they appreciate how much Norwegians and Swedes are discussed on the National Public Radio in the US. Of course, I am thinking of Garrison Keilor from whom we learn of the sour herring and stinky cheese and the interesting relationships between the Lutheran and Catholic flock in Lake Wobegone, Minnesota.<p>and of course, the <em> lingua franca</em> in Minnesota is peppered with, what best could be called "Skandineglish"!

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6th September 2002, 09:11 PM	#11
AndersP diyAudio Member Join Date: Aug 2002 Location: Middle Sweden	I´m a swede living in Norway and I know from personal experience that the mains wiring in this country is different from back home in Sweden. It´s a 240V system alright, but it´s 120V in one lead and 120 in the other and the fusebox have two fuses for each cirquit fused. So when I fex. turn the lightswitch off to hang a roof lamp or something one lead is still 120V. Finding this out standing on the top of a ladder, holding a heavy lamp, is not a nice experience! On top of all things, I´ve managed to repeat this more than once. BTW, alcohol would be a pretty crappy electrolyte wouldn´t it? Suppose beer would make a greater hazard than aquavit in this respect.

7th September 2002, 04:17 AM	#13
stein diyAudio Member Join Date: Sep 2002 Location: Bergen	So, to sum up all the advices, use common sense, drink akevitt (That's how it is spelled in norwegian) and use a grounded plug. Now, as I said I don't have a grounded outlet in my room. Running a wire frm the kitchen is possible, but only a short-term solution (and not a good one for me). Now, I have a perhaps unorthodox solution to the problem: I run pretty much everything electric from extension cords with muliple outlets, and they are all with grund plugs. If make an extension cord with only ground connected, plug it into one of these, and run it out the window to an iron pole driven deep (say 1m/3ft)m into the ground. Wouldn't this be sufficient? As a side note, what would using a dedicated ground like this do to hum loops?

7th September 2002, 05:14 AM	#15
mcp diyAudio Member Join Date: Jul 2002 Location: Vacation Land	Hi AndersP Seems to me it is a 2 phase electrical system. Is this the standard in Norway? Just curious.

7th September 2002, 06:49 AM	#16
skaara diyAudio Member Join Date: Jun 2002 Location: Europe, Slovenia	There would be difference in potentialbetween mains groung and that ground..

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