Originally Posted by **ryoung7** [http://nachi.cachefly.net/forum/images/2006/buttons/viewpost.gif](http://www.nachi.org/forum/f19/non-insulated-ground-wire-68048/#post861892)
*Electrical panel ground wire are designed to provide a path that will trip a breaker in the event of a shortage.*
This is not true. The grounding electrode plays no role in the operation of the overcurrent devices. The grounding electrode system is installed for four reasons and four reasons only. 1- lightning. 2- power surges. 3- unintentional contact with higher voltage lines. 4- to keep everything stable
Off a website dedicated to residential electrical educational information.
They quote and link to NEC material.
Will not go there agin.
A*Uninsulated ground panel wire.
again it is not required ( I understand ) to be insulated and the use of metal staples if fine. The corrosion in no way makes it deficient.
The ground is corroded, by 1/3 its thickness in areas between the staples.
Signs of corrosion ( various degrees ) throughout the exposed viable wiring.
Copper in contact with **Ferrous **alloy
Did not test ground for current. Should have.
Hypotheses: Electrolysis is not spontaneous. It requires an external source of energy.The screws triggered my tickers at a low setting.
** Galvanic corrosion?** moisture, temperature, and the level of pollution.
There is no sacrificial anode. The weakest metal will degrade.
Couples of copper and aluminum or copper and steel can lead to severe galvanic corrosion (see also Galvanic Series of Metals in Seawater or Galvanic Corrosion Chart).
**Non-Ferrous **They are not magnetic and are usually more resistant to corrosion
So leave out the **Ferrous **alloy contact.
Any recommendations or hypotheses to the corrosion.