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Earthing Schematic Query

Hi all, hope you are well.

Just a quick question on the attached snippet from a drawing - basically for an energy centre and on their earthing schematic all earth bars are shown as follows:

The big text above is the drawing revision text saying the change was deliberate.

I would have thought the above is not right - the main conductor should be connected to the other side of the disconnecting link.

What they have done on site is install a different earth bar as follows:

Disconnecting link is wrong way round?

I am not sure of the rationale behind this?

Any ideas?

Parents

0 mapj1 over 3 years ago

Can you post a clearer shot of the drawing or explain the problem in words - I cannot see what you are indicating. Why is there a swing link in the earth at all ? Normally if a bolted earth needs to be removed for testing, it can be unbolted. A swing link is more like a switch, in that there is an expectation it may be left in the open condition -is this true?

Is there a description of the test that requires the link to be open ?
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0 mapj1 over 3 years ago

Can you post a clearer shot of the drawing or explain the problem in words - I cannot see what you are indicating. Why is there a swing link in the earth at all ? Normally if a bolted earth needs to be removed for testing, it can be unbolted. A swing link is more like a switch, in that there is an expectation it may be left in the open condition -is this true?

Is there a description of the test that requires the link to be open ?
Cancel
Vote Up 0 Vote Down

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Earthing Schematic Query

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