French to English Tech/Engineering Energy / Power Generation

I know that this is an oarlock or thole pin used in rowboats; what puzzles me is what this is doing in my general regulations on electrical installations... Hereinafter, the offending paragraph:

5.2.3. La partie de la lance entre la pièce métallique du pulvérisation et la poignée arrière du tolet, ainsi que la poignée intermédiaire sont constituées d'une matière non conductrice tant aux sollicitations diélectriques liées à la tension de service.

This, by the way, has to do with cleaning (in this case by spraying, vaccuuming, etc.) of live parts...

I am now going to sing, "With a thole in my heart!"

And, oh, for the simple joys of translatorhood...