Best Practice for Grounding 3-Phase Motor Body: PE Conductor vs Local Earthing Terminal

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#1 21672013 24 Jul 2014 03:19

Hassan Kh Hassan Kh

Anonymous

Post #1
21672013 24 Jul 2014 03:19

3ph motors usually have their metallic body grounded either to the PE conductor of their power supply or to the earthing system terminal locally established in the building.
I wonder which of the above two methods is the most appropriate?
Thanks in advance
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#2 21672014 24 Jul 2014 18:14

Neil Mula Neil Mula

Anonymous

Post #2
21672014 24 Jul 2014 18:14

Hi Hassan,

Usually, it is on the body or metallic frame to the ground earthing surface where a person in contact with the motor will not experience any appreciable voltage difference.

God Bless.

Best,

Neil
#3 21672015 25 Jul 2014 02:01

Hassan Kh Hassan Kh

Anonymous

Post #3
21672015 25 Jul 2014 02:01

Hi Neil
Thank you very much for your reply. What I really need is to know if we should bring a PE conductor from MCC and connect it to the motor body or we'd better connect the motor body to the building ground mesh and bring only three phase conductors from MCC?
which one is more appropriate?
Again thank you
Hassan
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Best Practice for Grounding 3-Phase Motor Body: PE Conductor vs Local Earthing Terminal

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