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high zs

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High Zs on cct

Hi all, I have a circuit on a db we have installed which is a long run of cable, the R1+R2 comes out at 1.26 and the Zs is 1.24 , this is on a C20 RCBO, the maximum Ze according to the regs for the MCB side is 1.20 . I know it complies as its RCD protected but how do i put it down on the test...
- sparkydude
- Thread
- Apr 8, 2010
- high zs
- Replies: 63
- Forum: Periodic Inspection Reporting & Certification
A
Slightly high ZS reading

Hi Have installed a new ring circuit - for a kitchen - lots of points (19 in total) - TNS earthing, max ZS should be 1.16 - I'm getting 1.41 - have checked tightness of all terminations and all are good anyone got any ideas? Cheers
- andyww
- Thread
- Aug 25, 2009
- aus high zs reading
- Replies: 15
- Forum: Australia
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High Zs reading how to rectify

Hi Guys Just wondering again your thoughts on the following if you have a high Zs reading, what is the best way of rectifying it. say you have a BS60898 mcb type b 32a max Zs is 1.15 ohm. So if you took a reading when measured of say 2.23 ohms what is the best to fix this or remedy it. I...
- BristolSpark
- Thread
- Apr 6, 2009
- aus high zs how to reading
- Replies: 6
- Forum: Australia
R
High Zs readings

Hi, can anyone help? I've recently carried out a PIR on a school building which has 1 main distribution board supplying 9 other distribution boards around the school. Most of the installation is fine except for a number of circuits which have higher than normal Zs readings according to the...
- Rory
- Thread
- Jun 5, 2008
- high zs readings
- Replies: 1
- Forum: Periodic Inspection Reporting & Certification

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