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Re: oil dielectric

Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>

>>    Suppose the coil is running.
>>    Suppose the coil arcs over, in an unexpected way.
>>    Suppose the arc hits the oil.
>>    Suppose (since its an insulator) the oil gets a breakdown
>>    UNDER it.  Now the arc is in the oil.

>>We're talking about enclosed containers with no air.  There is

>>no way the arc will contact the oil.

	The Power Cos probably blow one transformer a day,
	nationwide, 'enclosed in containers with no air'.
	The accompanying fires (and, occasionally, explosions)
	can be found in the news paper.

>>You are correct, if the oil is left exposed and there were a conductor just
>>below the surface, an arc could form and eventually heat the oil.  There are
>>many poor construction techniques a person could use that would allow for
>>disaster with Tesla coils.  Your advice to not expose oii to arcing is well
> Excellent point,  air must be present for combustion.

	...and, in fault conditions (cracked container,
	tipped container, punched thru container) it will
	be.  'oil' is less combustible than, say gasoline
	(which is a LIGHT OIL....), but it will light.

	Sure.  Much oil has been used by many coilers for
	a long time.  I suppose i may be becoming wearing
	rattling on about this.  My point is it can be a VERY
	desperate situation.

> Would it be possible to construct a jacket with 
> a dielectric coating, so no possibility of arc?

	We are talking about 12" minimum, 12' max
	arcs (secondary side).  I'd be interested in which
	dielectric coating will stand off those sparks/arcs.

> What about something similar to a large garbage 
> can, only thicker?

	'most any coil will punch thru that.

> Maybe a double walled garbage can, the outer layer used

> for containment, similar to oil rigs.

	Double walled is sound thinking:  Many oil storage
	facilities are designed to have a 'dike' around them, to
	retain oil in case of failure.  Still, if the coil
	is running, and the oil pools up somewhere unexpected...

	And if there is a slow (un noticed) leak, and oil builds
	up somewhere unexpected, when next the coil is turned on.

	I'd hate to lose anyone to fire...