[TowerTalk] Torroid choke construction. To wrap or not to wrap in tape

[Jim Brown]

THHN is rated for use on AC wiring where there can be lightning in the 
3kV range. That 600V rating is for the 60 Hz voltage that it carries. 
There is no need for additional insulation.

73, Jim K9YC

On Tue,12/16/2014 9:55 AM, David Gallatin via TowerTalk wrote:
> I am about to construct a 12 turn on 2.4 od #31 choke from the cookbook using the described #14 THHN.  I have come across references to the possibility of voltage arcing through the insulation (rated at 600V) into the core and that perhaps wrapping a layer of electrical tape around the core is the ounce of prevention needed. Is this needed and/or advisable? Would the tape affect the choke values at all?