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4hv.org :: Forums :: General Science and Electronics
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science fair project

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Weston
Sat Dec 27 2008, 06:53PM Print
Weston Registered Member #1316 Joined: Thu Feb 14 2008, 03:35AM
Location: Cambridge, MA
Posts: 365
I am trying to enter my VTTC in my local science fair and I looked at the regulations. I have to use UL rated cords place the ENTIRE tesla coil in a metal grounded box, shield the tube with lead, thermally insulate the breakout, and rewind the coil with at least 50,000 volt rated wire. The regulations are here http://www.gsdsef.org/2009/rules%20and%20regs%20-%202009.pdf. Is there anyway I can avoid these ridiculous regulations? Thanks
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Myke
Sat Dec 27 2008, 07:39PM
Myke Registered Member #540 Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
Couldn't you explain to them that puting the coil in a Faraday cage would be sufficient? Also that there isn't 50kV for every turn so the insulation would see less than that voltage? I can understand them wanting you to shield the tube with lead because they fear x-rays. I don't know how you would get around that one...

EDIT: You can use a Faraday cage as far as I can tell. They also said sufficient insulation so you should be fine. If the discharge point is inside the cage then it is insulated by air I guess.
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Weston
Sat Dec 27 2008, 07:48PM
Weston Registered Member #1316 Joined: Thu Feb 14 2008, 03:35AM
Location: Cambridge, MA
Posts: 365
50Kv wire because of accidental contact "Wiring must be properly insulated." My experiment consists of lighting up florescent bulbs without wires so I cant use a faraday cage.
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Myke
Sat Dec 27 2008, 07:49PM
Myke Registered Member #540 Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
Can't you put the bulb and whatever you want to light up inside the cage?
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Weston
Sat Dec 27 2008, 07:57PM
Weston Registered Member #1316 Joined: Thu Feb 14 2008, 03:35AM
Location: Cambridge, MA
Posts: 365
The energy from the tesla coil would be lost through the cage, also the tesla coil lights up the bulb from about a meter.
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rp181
Sat Dec 27 2008, 08:09PM
rp181 Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
acrylic shield with farady cage inside/ outside of it. Ive entered before, they dont check to make sure. Just explain on the risk assessment form.
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