A Clear Path to Ground
Jul 1, 1999, By Donald Berozi, P.E.
Dual service with double-ended switchgear from different manufacturers presented a grounding system that would not function correctly due to the connection’s configuration....
Demystifying Isolated Grounded Systems — Part 2
Apr 1, 1999, By Ken Michaels, Bell South Corp.
Consider all site parameters before recommending an IG system. But first, measure existing equipment grounding system's impedance with a ground impedance tester prior to making any changes to the grounding system....
Should You connect Transformer Ground to Building Ground?
Mar 1, 1999, By Fred Hartwell, Senior Editor
Should You connect Transformer Ground to Building Ground? Q. What are good transformer grounding techniques? I would especially like to know about connecting...
Demystifying Isolated Grounding Systems — Part 1
Mar 1, 1999, By Ken Michaels, Bell South Corp.
Your objective is to extend the zero volt reference to the neutral-ground input at the equipment location....
Solid Grounding For Your Generator
Feb 1, 1999, By Harry L. Masten, P.E., C.P.E.
Generator grounding errors can cause current flow in de-energized circuits. This can cause nuisance tripping of protective circuits, with costly and possibly lethal results....
Achieving an Acceptable Ground in Poor Soil
Oct 1, 1998, By Keith Switzer, ERICO, Inc.
To ensure your electrical system functions properly, it's important your buried ground system has low impedance. So how do you achieve this goal while keeping safety in mind?...
Monitor Ground Fault Leakage Currents
Aug 1, 1998, By Pentti Taskinen
Most power quality problems are due to incorrect connections of an electrical system. Using CTs and leakage current monitors, you can check an electrical system during acceptance testing of the installation and also during maintenance and renovation of the system....
Ground Testing Essentials
Aug 1, 1998, By Jeff Jowett, AVO International
Proper grounding is essential to maintaining good power quality. Do you know the essential steps of doing a ground test?...
CNC Machine Tool Grounding: Pleading Your Case
Jun 1, 1998, By Ken Michaels, F.D Hayes Electric Co.
Alert the OEM of possible shock hazards, lightning damage, ground loop currents, and electrolysis in your facility. If you find its "required" ground rod causes such problems, ask the OEM to accept liability in writing....
How Far Do Electrodes Extend?
Mar 1, 1998, Frederic P. Hartwell
Do grounding electrodes end at the building wall, or do they continue on into the building? How does that affect the application of other Code rules?Code...
Eleven practical tips for grounding substations.
Oct 1, 1996, Switzer, W. Keith
A properly designed and installed grounding system ensures reliable performance of electrical substations.Just how important is substation reliability?...
Grounding separately derived systems to water pipes
Sep 1, 1996, Hartwell, Frederic P.
The new paragraph in Sec. 250-80(a) creates questions about the relationship between water piping and separately derived system grounding.One of the most...
Solving instrumentation ground loop problems
Feb 1, 1996,
Unwanted ground loops can cause inaccurate sensor readings by negatively affecting instrumentation signals.Today's modern process plants are highly dependent...
Quality grounding and power
Feb 1, 1996, Lewis, Warren H.; Hartwell, Frederic P.
A step-by-step look at a highly effective grounding design for an information technology area that also fully complies with the NEC.The Computer and Business...
An overview of IEEE 1100: The Emerald Book.
Feb 1, 1996, Gruzs, Thomas M.
This standard seeks to bring order to the apparent chaos of power quality assurance by describing recommended practices for powering and grounding sensitive...
