Sunday, April 4, 2010

Service Entrance Equipment

"The System Ground relates to the Service Entrance Equipment and the interrelated and bonded components; that is, the system and circuit conductors are grounded to limit voltages due to lightning ,line surges, or unintentional contact with higher voltage and to stabilize the voltage to ground during normal operation per NEC Sections 250.4(A)(1) and(2)"
nccer Training Guide

Saturday, April 3, 2010

Grounding Electric Services Part 4

A wire that is used to connect electrodes is referred to as a grounding electrode or electrodes is referred to as a grounding electrocde conductor (GEC). Note there is a difference in the two meanings: One is grounded, while the other provides a means for grounding.

Grounding Electric Services..part 3

The word Ground refers to ground potential or earth ground. If a conductor is connected to the earth or some conducting body that serves in place of the earth, such as a driven ground rod(Electrode), the conductor is said to be grounded. The neutral conductor in a three-or-four wire service,for example, is intentionally grounded, and therefore becomes a grounded conductor.

Grounding Electrical Services part 2

Proper Grounding ensures that the electrical charges that cause these higher voltages are channeled to the earth or ground and that an effective ground fault path is provided throughout the system so that the overcurrent devices will open before people are endangered or equipment is damaged.

Grounding Electric Services..

The Grounding system is a major part of the electrical system. It’s purpose is to protect People and Equipment against the various Electrical faults that can occur. It is sometimes possible for higher than normal voltages to appear at certain points in an electrical system or in the electrical equipment connected to the system.