high zs readings on site cabin

[Farmelectrics]

there are no faults on sockets dead tests were all ok I took a zs at the site cabin sorry not a ze now I know the cabins are protected by a commando socket / rcd so the readings are actually ok ie 1667 ohms but its the zs of 0.69 that had me scratching my head will retest on Monday but was looking for ideas on the matter thanks in advance

 

[westward10]

It is possible the external impedance of the cabin dramatically changed between tests. You need to work back to the source and confirm the earthing system before you continue.

 

[telectrix]

just wondering if an operator error took a reading L-N instead of L-E?????

 

[westward10]

just wondering if an operator error took a reading L-N instead of L-E?????

He would have plugged into the socket so I think not.

 

[Dillb]

He would have plugged into the socket so I think not.

My Metrel tester allows me to carry out either a Zs or Zn test. So could be operator error.

 

[MFS Electrical]

And so will a megger mft 1720 & 1721 if you put the wrong connector in the wrong hole and are using the 2 hi setting

 

[DPG]

Any update on this one?