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[Mr Skrunts]

Explain this one for me.

A friend of a friend had someone go in thier loft to do a job, it then seems whislt moving arrounf he held on to the indoor roof aerial and a copper pipe and got a burn from an electric shock.

They called the aerial installer who apparently didnt stop laughing. and said it was impossible to get an electric shock from an aerial.

An electrician was then called out and found no major fault, but tested all electrcal items in the house and found that 2 freeview box's were giving reading's of 10v and something else was reading 10v other item was the video recorder.

Now it seems all electrical items were turned off and then turned on one by one till these reading were found.

Now allthough these 3 figures were added together as told to me it was said that would be a 30v shock this person suffered.



Now my thinking is that none of these items should be showing a voltage, but if 1 item for example did show 10v (and at this point I dont know if this was on the case , a lead or input/output socket) then the same 10v would be showing from anything connected to it. (Hence 3 different items reading 10v each and sharing the shame aerial.


How would they be able to test thier own box with a multi metre.(By this I mean test the outer case for voltage, incase that was showing the 10|V as well) Plus is there any way or reason that 10v should be pressent.  No sky box was mentioned as I said to my friend, I was aware the 2nd aerial output carries 9v to power a magic eye, but has to be switched on 1st.

TIA.   

[cem_devecioglu]

sometimes I measure our dishwasher to have 30 volts..   when wifey jumps and shouts ..  :-?

but no burns..

easy to measure between the metal part and ground  ..

[Debs.]

Masthead amplifiers are powered via the co-axial cable at 12 V. (ish).....so, I wouldn`t have thought 10 V. in the co-ax. was dangerous or unusual.......but if it were 5V. A.C (from a 'neutral' wire) and it touched your inner-forearm and you were resting against a copper pipe, then you might experience slight muscle-flexion stimulation and that might make one`s arm 'jump'; but only felt as a (tiny) humming 'tingle'......go-on: ask me how I know!

[Marks DTM Calib]

Static discharge.....nothing more.

Always feels worse than it really is

[Marks DTM Calib]

As for the three items outputing 10V each which could equal 30v....not unless they were in series.....which I doubt.

[redelitev6]

  i always get a static shock from the trolleys in tesco,bloody things get me every time, i should know by now but i still get a suprise when it happens

[STMO999]

i always get a static shock from the trolleys in tesco,bloody things get me every time, i should know by now but i still get a suprise when it happens

Stop wearing your wifes synthetic underwear.

[Mr Skrunts]

Masthead amplifiers are powered via the co-axial cable at 12 V. (ish).....so, I wouldn`t have thought 10 V. in the co-ax. was dangerous or unusual.......but if it were 5V. A.C (from a 'neutral' wire) and it touched your inner-forearm and you were resting against a copper pipe, then you might experience slight muscle-flexion stimulation and that might make one`s arm 'jump'; but only felt as a (tiny) humming 'tingle'......go-on: ask me how I know!

you know every thing Debs, and I reckong what you dont know is'nt worth bothering about.   

[Tony H]

As has been said sounds like static, however I would think it highly unlikely that it would actually cause a burn

[Del Boy]

i always get a static shock from the trolleys in tesco,bloody things get me every time, i should know by now but i still get a suprise when it happens

Don't drag your feet along the floor 

[unlucky mark mv6]

Masthead amplifiers are powered via the co-axial cable at 12 V. (ish).....so, I wouldn`t have thought 10 V. in the co-ax. was dangerous or unusual.......but if it were 5V. A.C (from a 'neutral' wire) and it touched your inner-forearm and you were resting against a copper pipe, then you might experience slight muscle-flexion stimulation and that might make one`s arm 'jump'; but only felt as a (tiny) humming 'tingle'......go-on: ask me how I know!

you know every thing Debs, and I reckong what you dont know is'nt worth bothering about.   

She certainly puts a few blokes to shame dont she.

[pedroMV6]

Static - as said.
Sometimes I get it from touching the car after getting out of it (any car, matters not the make model or year!).
I sometimes get it from touching the metal lightswitch after getting up from my new sofas!

My daughter is the same, sometimes toy can see the sparks fly when she kisses me good night!
The missis doesn't have this problem.


Ooh, that sounds a bit wrong, doesn't it!

[redelitev6]

i always get a static shock from the trolleys in tesco,bloody things get me every time, i should know by now but i still get a suprise when it happens

Stop wearing your wifes synthetic underwear.

how did you guess??

[hoofing it]

god i thought I was dreaming when I got a tingle from the sky box the wife took the piss out of me

[Radiomarko]

Agreed probably static in this case, but be aware that  certain faults in the power supply circuits of VCR/DVD/TV etc can cause a high PD - potential difference, between chassis (ground) and signal connectors such as the RF (TV antenna) input or scart pins for example. In worst case the chassis can be at mains potential.... and everything attached to it - I still have the scars      so just as well to have checked!