[TowerTalk] [NCCC] Dielectric Constant of THHN

[Dean Straw]

Jim:

EZNEC Version 5 has a default value of 3.5 for PVC insulated wire's
dielectric constant, with a loss tangent of 0.05. (In EZNEC Version 5, in
the Wires dialog box, right click on the "Diel C" box to see default
values.)

73, Dean, N6BV

> Subject: [NCCC] Dielectric Constant of THHN

> I use THHN for antenna wire. For purposes of using NEC to design for
> length, I need the diectric constant of the insulation used in THHN.
> For #12, I've been using a thickness of 0.0445 inch and constant of
> 2.0. Is this a good first approximation?

<snip>

> Jim K9YC