Jan,
315mm is 12 inches+, so a fairly substantial output may be involved,
meaning a large space free from strike hazards is the only way.
Fluorescent tubes can and do explode, with an odd tendency to shatter
several minutes after being hit. Another list member (DW) can testify to
that after being under one of my 'hits' at the time of exploding,
subsequently I then removed tubes prior to running (strike distance to
the lamp of that particular incidence would only have been 6 to 7 foot
from memory @ around 7kw+)
Wiring in conduit can also get damaged, presumably as the voltage jumps
from the cable core to the conduit. Fire alarms can also be set off. In
fact anything left plugged in is 'game', even when switched off. I've
managed a modem, a washing machine and a VFD drive for a lathe, those
last three were with just a 4 inch coil on three NSTs.
So I would say prospect for damage is high with a big coil. A good
independent RF earth is a must, and a breakout point to a suitably
placed RF earthed target may help steer the streamer in a safe
direction.
Phil
On 27.11.2018 11:56, Jan Ohlsson wrote:
> Hi,
> I am getting close to testing my 315 mm tesla coil for the first time. But I think there is a possibility for streamer strikes to the overhead fluorescent lighting fixtures, or the suspended cabling for these.
>
> How would you assess the risk for damage to cabling or lighting fixtures?
>
> If necessary I could screen the cabling with a copper mesh connected to RF ground, or move the flourescent lighting, but that is a lot of work, so I would like to see to what extent the streamers are attracted to the cables first.
>
> Jan
> Stockholm, Sweden
>
> Skickat från min iPad
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