REALLY Low reading PFC Test

[riotmaster]

On a caravan site, just tested the main incoming Ze and PFC.

Ze= 8.67Ohms, (TT System, so less than 21Ohms OK)

but PFC was 21AMPS??? as in 0.021kA

there are RCD's at different points throughout the installation, which keep tripping randomly.

also switching the shower lights on, was tripping the RCD for the Cafe (both on different DB's, only fed from same DB at origin but different ways)

Any thoughts or comments... I need some HELP?!

 

[Modernelectric]

Are the shower block and cafe next to each other or detached?

Are there any shared earthing points or borrowed lives/neutrals?

 

[riotmaster]

thanks for the quick response...

they are seperate buildings but next to each other.

and no shared earths, or borrowed neutrals... though thats only from a visual inspection, doing a periodic tommorow. they seem to all be back to relevant earth / neutral bars in the CU, and then obviously through the supplies back to incoming DB.

 

[Modernelectric]

Does each DB have its own earth Spike??

also check all connections in any db that they share

 

[riotmaster]

no, theres two earth rods near the origin, one wired to the origin DB and one to an incoming JB, then linked together...

 

[Modernelectric]

let us know how you go on testing it and i might be able to offer more help!

 

[riotmaster]

will do, thanks modern, at least I know I'm not missing anything obvious.

 

[sparkswillfly]

try rechecking your meter on another supply

 

[riotmaster]

yeah i'm going to take another one with me tommorow. But considering he's having problems with tripping RCD's, i'm not presuming anything, whether it be a faulty tester, or purely a problem with the circuit, especially neutral/ earth arrangments.