ok now we are on the path of enlightenment... read this
In physics, the term dielectric strength has the following meanings:
Of an insulating material, the maximum electric field strength that it can withstand intrinsically without breaking down, i.e., without experiencing failure of its insulating properties.
# the maximum electric stress the dielectric material can withstand without breakdown
The theoretical dielectric strength of a material is an intrinsic property of the bulk material and is dependent on the configuration of the material or the electrodes with which the field is applied. At breakdown, the electric field frees bound electrons. If the applied electric field is sufficiently high, free electrons may become accelerated to velocities that can liberate additional electrons during collisions with neutral atoms or molecules in a process called avalanche breakdown. Breakdown occurs quite abruptly (typically in nanoseconds)., resulting in the formation of an electrically conductive path and a disruptive discharge through the material. For solid materials, a breakdown event severely degrades, or even destroys, its insulating capability
Factors affecting dielectric strength
* it increases with the increase in thickness of the specimen. (Directly proportional)
* it decreases with the increase in operating temperature. (Inversely proportional)
* it decreases with the increase in frequency. (Inversely proportional)
* it decreases with the increase in humidity. (Inversely proportional)
the dielectric strength of air is 3 mv/m
so if thats tru then natural water is 78.54 more resistive so 3x78.54 = 235.62 millivolts...
resources
http://en.wikipedia.org/wiki/Dielectric_strength