If one was to drive under a high tension power line and contact it with
their antenna the worst they might expect is a distroyed radio and perhaps
scortched tires if the dirt on them conducted enough.
Inside a metal vehicle one is in a "faraday Cage' and any electricity
flows on the outside, without passing through anything or anyone on the
inside. The current would flow through the antenna to the radio,
through the radio to ground taking the best path,usually the radio's
ground or the battery. Good conductors between the radio and ground could
be affected during this, but nothing else.
If they kept driving, that would be the end of it. To be electrocuted
they would have to stop with the antenna still in contact with the power
line and get out of the vehicle by placing their foot on the ground while
still holding on to some metal part of the vehicle. If they did that,
*they* would suddenly become the path of least resistance!
In general, if you're inside, you're safe (if the tires don't catch
fire!). So drive out from under it or wait for the power people or the
fire department. If you must leave the vehicle, jump!
On Wed, 25 Aug 1999, Richard Notton wrote:
>=20
> -----Original Message-----
> From: Gordon.W.I. McMillan <gwim2@student.open.ac.uk>
> To: Richard@fv623.demon.co.uk <Richard@fv623.demon.co.uk>
> Cc: mil-veh@skylee.com <mil-veh@skylee.com>
> Date: 25 August 1999 18:21
> Subject: Re(2): [MV] WWII Jeep Radio Antenna
>=20
>=20
> >If it touched an overhead line at 11Kv or thereabouts would such a devic=
e
> >be any use ? (Speaking as someone who always uses ariel tiedowns)
> >
> Of course its far,far better not to contact any overhead line, typically
> isolation capacitors are rated at 5KV in the older MV's radio gear since =
its
> normal in Europe to find 11KV lines on full sized pylons and you'd need 4=
0' or
> more of antenna to touch one, the greatest danger is the much lower, ofte=
n on a
> telegraph pole type support, 440v 3=D8 domestic distribution and the bloc=
king
> capacitor is well able to handle this.
>=20
> Richard
> (Southampton UK)
>=20
>=20
> =3D=3D=3D
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>=20
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