Muriel,
Richard is right, by coincidence I received a task to conduct a site
survey where a 25Kvolt line runs approximately 5 feet underneath the ground
floor. I measured the magnetic field from 30Hz to 100KHz with a magnetic
loop antenna and found that at 60Hz the level was 135dBpT. This is slightly
higher than the magnetic field generated by common house hold appliances.
Therefore I agree with Richard in that there is no danger.
William D'Orazio
-----Original Message-----
From: Mark Gill [mailto:[email protected]]
Sent: Tuesday, May 16, 2000 9:08 AM
To: '[email protected]'; [email protected]; [email protected]
Subject: RE: Is it Safe?
Muriel - I hope this link helps...
http://newton.ex.ac.uk/aip/physnews.383.html#2
<http://newton.ex.ac.uk/aip/physnews.383.html#2>
Regards,
Mark Gill
EMC/Safety/NEBS Desgin
Nortel Networks
-----Original Message-----
From: [email protected] [SMTP:[email protected]]
Sent: Tuesday, May 16, 2000 7:38 AM
To: [email protected]; [email protected]
Subject: RE: Is it Safe?
Safe from what? The majority opinion is that exposure to EM fields
is
considered to be safe if the exposure is less than specified in standards.
These standards are based upon short term observable effects to cells. The
very minority opinion is that much much lower levels of fields can cause
certain types of cancer. If they are right, then we should all turn off most
of the electrical circuits in the world.
I have no doubt that the fields from that power line fall below the
limits
of the exposure standards. And I would not worry about cancer. Your chances
of being killed by lightning are much higher.
Richard Woods
----------
From: Muriel Bittencourt de Liz [SMTP:[email protected]]
Sent: Monday, May 15, 2000 6:38 PM
To: Lista de EMC da IEEE
Subject: Is it Safe?
Hello Group,
I'd like to know if is it safe for somebody to have his
office 7
meters
away from a high voltage line (132KV, 50Hz)?? The working time of
the
person is 8 hours a day.
Thanks in advance
Muriel
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