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I would add a recommendation to make sure that there is no way a spark
can cause a discharge across the drive motor windings, if one is used.
I lost a small induction motor because of a spark to the motor shaft
ended up causing an insulation breakdown and a power line arc which
destroyed the windings. While the average current is indeed small the
peak current is not.......
Ed
On 2/18/2018 5:06 AM, Antonio Queiroz wrote:
Em 16/02/2018 17:32, doug escreveu:
For those also interested in VanDeGraaffs a question
This is a video of a VDG I just finished building, You will notice
some strikes to the dimmer switch, would it be wise to use a 2 wire +
ground for the AC hookup I have instead of the 2 wire only?
If the sparks below the lower terminal are real, because they may be
something created by the camera, it's because the lower shield is not
grounded, and the electricity is seeking ground through the power
supply. It's enough to connect the shield to the power line ground.
The average current is small, as this is a VDG and not a Tesla coil,
and shall not create interference problems.