Electrical Ground Work

Because certain foundational items are assembled prior to any over-ground constructions, they can easily be forgotten. Nonetheless, just because you don’t see it, doesn’t mean that it doesn’t exist, nor does it have essential value. Nothing stands as true as electrical ground work

Because most homeowners are not comfortable with the knowledge and experience of a home improvement project dealing with electrical work, general residential contractors and building contractors who can handle electrical jobs are required. Also, because of the varying needs of electrical ground work, an extensive knowledge in electrical ground work will be a very crucial component in a general contractor’s serviceability and reputation in getting electrical jobs completed.

Electrical circuits may be connected to ground (earth) for several reasons. In power circuits, a connection to ground is done for safety purposes to protect people from the effects of faulty insulation on electrically powered equipment. A connection to ground helps limit the voltage built up between power circuits and the earth, protecting circuit insulation from damage due to excessive voltage.

Connections to ground may be used to limit the build-up of static electricity when handling flammable products or when repairing electronic devices. In some types of telegraph and power transmission circuits, the earth itself can be used as one conductor of the circuit, saving the cost of installing a separate run of wire as a return conductor. Safety for workers has to be a priority. Electrical shock kills and injures hundreds of workers each year. Most of these accidents happen because people don't look, don't think or just don't understand the shocking power of electricity.

Death or injury is not caused by the voltage; the damage is done by the amount of current that flows through the body when the contact is made.   Of course, the higher the voltage, the greater the amount of current. Electricity and proper grounding work together for safety. A ground is a conducting connection between an electrical circuit or equipment and the earth, or to some conducting body that serves in place of the earth

When you're doing a remodeling job, wiring may be old and outdated. If you're tearing out walls enough to expose wiring, it should be brought up to code. Obviously, that involves more work and money for materials like cable, boxes, switches, staples, but you'll feel much better having newer, safer cable in the house.

Experience and knowledge in grounding electrical work can help quell some of the usual problems associated with electrical work. “Noise” problems are such a dilemma, that solving "noise" problems is an art within itself. Since it doesn't come up every day, most have limited practical experience. This has spawned an industry for those who are now specialize in solving noise problems.

Minimizing the influences of electrical noise on control system performance and reliability requires:

Using isolated ac power sources;
Establishing a single, common system ground point;
Providing isolations for low-voltage signals (for example, thermocouples);
Minimizing undue influence resulting from stray magnetic fields; and
Selecting appropriate cables and pathways, including adequate cable separation.

Another solution: the deep grounding method overcomes problems associated with shallow grounds such as variations of temperature and moisture at the surface of the earth. Earth resistivity is lower at deeper penetrations due to the influence of the water table. Deep grounding is the practice of driving ground rods, often to the point of refusal, to obtain lower grounding resistance at least cost. The deep rod is assembled from shorter ground rod sections that are coupled together, end to end, as the assembly is driven into the earth.

Improper grounding practices, such as grounding cable shield wires at both
ends or at the wrong end, are well-documented sources of introducing
electrical noise. The bottom line is that a perfect "quiet" ground does not exist, but finding solutions for the widespread issues that can occur will hedge your business above other