Is Your Lab's Grounding Jack Properly Connected?

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Discussion Overview

The discussion revolves around the reliability of a grounding jack in a lab setting, particularly in an older building. Participants are exploring methods to test whether the grounding connection is functioning correctly, with a focus on electrical grounding rather than mechanical aspects.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant expresses concern about the trustworthiness of the grounding connection due to the age of the building and seeks methods to test it.
  • Another participant questions whether the issue is electrical or mechanical in nature.
  • A clarification is provided that the inquiry pertains to electrical grounding, specifically regarding a labeled ground socket in the lab.
  • One participant notes that local codes exist for grounding and testing, which may vary by location, and emphasizes the need for periodic retesting due to changing conditions at the ground terminal.
  • A suggestion is made to purchase a grounding tester from a hardware store as a practical solution for testing the ground connection.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best method for testing the ground, and there are varying opinions on the implications of local codes and the reliability of the grounding connection.

Contextual Notes

There is an acknowledgment of the potential variability in local grounding codes and the importance of periodic retesting, which may not be universally applicable.

drerzaask
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We have jack in our lab that is suppose to be connected to ground, but the building is old, and we are not sure if we can trust that it is actually connected to ground. Is there a way to test the ground? If so, what is that way?



Dr. Erzaask
 
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Is this an electrical question or a mechanical one?
 
This is an electrical question.

We would like to know if we connected our system to the rooms electrical ground socket, the system is actually ground. We want to be able to test the electrical ground in the building. Also when I say ground socket, I do not mean the third prong on a wall socket. There is an actual ground socket in the lab room that is labeled ground.
 
Well I don't know where in the world you are but most places have their own national codes about such grounds and their testing.

On problem which such local grounds is that require periodic retesting because the conditions at the local ground terminal where it is connected to ground may change with time.
 
drerzaask said:
We have jack in our lab that is suppose to be connected to ground, but the building is old, and we are not sure if we can trust that it is actually connected to ground. Is there a way to test the ground? If so, what is that way?



Dr. Erzaask

You can just buy one of these testers at the hardware store for about $10:

http://www.microcenter.com/images/shared/products/0209814_338202.jpg
0209814_338202.jpg
 

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