How to work out average earth electrode value

[Sb8389]

Hi guys,
im doing revision for 2394 and got a question on getting the average ohms value for an earth electrode test.
the readings obtained were 179,181 and 185ohms and they asked for the average.
i have checked GN3 but it ain't clear.
can anyone give me a method of how to work this out.
cheers.

 

[cprfenom]

Hi guys,
im doing revision for 2394 and got a question on getting the average ohms value for an earth electrode test.
the readings obtained were 179,181 and 185ohms and they asked for the average.
i have checked GN3 but it ain't clear.
can anyone give me a method of how to work this out.
cheers.

The way you have worded the question would imply that you add the total resistances and then divide by the number of readings.

So 179+181+185 = 545ohms
545/3 = 181.666ohms or rounded to 182ohms

 

[Sb8389]

Cheers pal.
that is one of the answers so it's cleared it up for me.