RE: Interference-SSTC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Gary.Lau-at-compaq-dot-com>

The metal box, the Variac frame, and anything else that you will be
touching should be connected to the 3rd wire mains ground.  I don't connect
any part of my coil to the 3rd wire ground, although there is some
controversy over what to connect the NST case to.  I don't know what your
circuit is so I can't comment of what it's ground should go to.  

Gary Lau
MA, USA

>Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" Fucian-at-aol-dot-com
>
>So where do i connect the ground?Do i use the ground wire for both the
>metal box and the circuit ground?
>
>MAtt

>> Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-qwest-dot-net>"
><Gary.Lau-at-compaq-dot-com>
>> 
>> If you have the mains neutral tied to the system ground, this is a serious
>> No-No.  Since the neutral is a current-carrying conductor, it will develop
>> a voltage drop along its length.  Depending upon its length and the amount
>> of current through it, there will be a considerable potential developed
>> between the neutral (at your TC), and true (3rd wire mains) ground.  
>> 
>> Connecting the neutral to your TC ground is also a serious safety problem.
>> If the neutral wire should be broken or interrupted, your TC "ground" will
>> be at "hot" potential!
>> 
>> Gary Lau
>> MA, USA
>> 
 
>>> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
>>><Fucian-at-aol-dot-com>
>>> 
>>> I am still having shocks from the coil.I have checked everything.
>>> 
>>> A few points that could be probs are:
>>> 1-the power in for the primary is from a variac.The terminal where the hot 
>>> wire is connected to the variac is also connected to the rectifier.The 
>>> Neutral wire is connceted to the ground of the entire system.The ground
wire 
>>> goes to the metal enclosure.
>>> 
>>> There is probably a wiring problem here.I dunno.It SEEMS to work fine.
>>> 
>>> 2-ALl the pots and the on switch to the 555 timer is bolted on the metal 
>>> enclosure.If there is a wiring problem with the power in for the primary, 
>>> this would explain how the heatsink has a potential.
>>> 
>>> Matt