The service will be 208V, 3-phase, 4-wire. Main service disconnect will be 100 Amp
The service entrance equipment will be located in an outdoor, weatherproof and heated enclosure. The enclosure also encloses a control system for a concrete sewage lift station with a bottom at 18 feet below grade.
One of the main considerations is that the ground freezes during the winter. I've also heard that the permafront is 1800 feet deep in places around Skagway.
Do you have any thoughts the design of a good grounding electrode system be that provides the necessary grounding (earthing) protection year round??
Thanks for your comments, your expert help is much appreciated. Rich Thomas
Just to bump dmattox's question, because I'd like to know more.
I'm not sure how freezing would be a problem for the GES?
My understanding is that the conductivity of soil/clay/earth depends upon the ionic conduction, where ionized atoms physically _move_, rather than metallic conductivity. If the ground freezes, then the conductivity can drop in much the same way as a GES in soil that becomes very dry. At least that is my weak understanding. I'd love to learn more on this topic.
#57234 - 10/13/0510:28 PMRe: What makes a good grounding electrode system for Skagway Alaska??