On 10/18/2017 6:07 PM, Jim Brown wrote:
On 10/18/2017 4:21 PM, Wes Stewart wrote:
The NEC says of bonding in Article 100: "The permanent joining of metal parts
together to form an electrically conductive path that has the capacity to
conduct safely any fault current likely to be imposed on it." By this
definition, the coax shield is a bonding conductor. You're making stuff up.
That's a 60 Hz definition, related to blowing the fuse or breaker. It is NOT a
suitable definition for lightning nor for EMC, which demands low impedance at
the frequencies of interest. And the frequency of interest for lightning
extends well into the MHz range.
73, Jim K9YC
Of course it's a 60 Hz definition. Nevertheless, it's a bond in my book. While
you claim "most" of lightning current will stay at the tower, "some" will not,
regardless of what the "connection" (to avoid the use of bond) impedance is.
My antenna structures are well over 100' from the house, so I do what a lot of
us here do; break all connections between the tower and the house during
thunderstorm season.
Wes N7WS
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