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Why ground?

There are several important reasons why a grounding system should be installed. But the most important reason is to protect people! Secondary reasons include protection of structures and equipment from unintentional contact with energized electrical lines.

Practical guide to electrical grounding systems and applications
Practical guide to electrical grounding systems and applications (photo credit: cazphoto.co.uk via Flickr)

The grounding system must ensure maximum safety from electrical system faults and lightning.

A good grounding system must receive periodic inspection and maintenance, if needed, to retain its effectiveness!

Continued or periodic maintenance is aided through adequate design, choice of materials and proper installation techniques to ensure that the grounding system resists deterioration or inadvertent destruction. Therefore, minimal repair is needed to retain effectiveness throughout the life of the structure.

Building exterior grounding
Building exterior grounding

Installing grounding systems

This book is designed for the contractor who finds that installing grounding systems, which are in compliance with all relevant codes and standards, is a complex and somewhat mystifying assignment!

While in larger facilities, the design of a proper grounding system is certainly complex and should be left to a qualified engineer, the everyday grounding installations and applications covered in this text are well within the scope of the qualified contractor.

In most facilities, a thoughtful contractor can follow the guidelines and techniques in this book and be reasonably ensured that he has done a competent and code compliant job. This book is not written for the casual contractor who was in the painting business last week!!

It is for the electrical contractor who intends to be in business next week, next year, and in the years to come.

Design and installation of electrical grounding systems is one of the most important aspects of any electrical distribution system, yet it is all too often misunderstood and subsequently installed improperly.

Some detailed knowledge of the facility is needed, and the contractor who intends to do the job correctly must make the investment in time and tools – or hire someone to do these things for him. Guesswork won’t do!!! The subject is too serious and complex for that kind of approach. We hope you find our recommended approaches helpful and cost-effective.

Title:Practical guide to electrical grounding installations and applications by ERICO
Format:PDF
Size:3.7 MB
Pages:131
Download:Right here | Get Download Updates | Get Technical articles
Practical guide to electrical grounding installations and applications by ERICO
Practical guide to electrical grounding installations and applications by ERICO

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3 Comments


  1. Panneer selvam Rathinam
    Jun 19, 2017

    After connecting the earth bus of the panel, you are measuring the combined earth ressitance of the substation, which normally will be less than 1 ohm


  2. Concordio Tanedo
    May 09, 2017

    Regarding Grounding System,
    I buried a 20mm x 3000mm copper clad ground rod when i check the ground resistance using Kyoritsu 410A earth tester, the reading is 15 ohms, i connected it to the ground bus to the panel board and recheck again with the same earth tester the the read became 0.45 ohms, Can anybody could explain why did it reduce the reading? The panel board is mounted on the concrete wall.


    • Emer Obleopas
      Jun 19, 2017

      Where did you connect the testing terminals?

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