[TowerTalk] Do I need an insulator on the ends of my dipole?

[Kevin Zembower via TowerTalk <towertalk@contesting.com>]

Hello,

I'm replacing my 40/20/10M fan dipole with an even more stealthy one, 
using small gauge insulated stranded copper-clad steel. The suspension 
goes from a post in my back yard, to a mast on the peak of my roof, to a 
tree in the front of the yard. At both ends, there's at least 10 feet of 
nylon cord.
Currently, there's a ceramic insulator at each end of the dipole, 
between the dipole wire and the nylon cord. Do I need any kind of 
insulator? Isn't the nylon cord an insulator? I can work out the 
mechanical stress with thimble eyes. Why do I need an insulator?
I only run 100W maximum with my system max.

Thanks for your advice and guidance.

-Kevin
KC3KZ
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