number of test result

[chtangelus]

Do I need 2 test result if I had a new CU in outdoor building?

 

[telectrix]

if you are modifying any circuit in existing board, then you have to test that circuit as well. also depends on how you are earthing the new CU.

 

[chtangelus]

I was right about that, now my problem is when I measured Zs I got a higher result than the claculated one wich I explain by not including the armoured cable when calculated R1+R2. I calculated R1+R2 for the armoured cable and found the difference in my result>
Question is how do I put that down in test result or am I doing it all wrong.
New cu Earthed using third core of swa to main earthing terminal.

 

[telectrix]

how is your SWA supplied?

 

[chtangelus]

main cu 20 amp circuit breaker

 

[telectrix]

ok so at least the SWA is protected. what are your your Zs readings on the new circuits. i assume you've got a 16A and a 6A? also. if your SWA is RCD protected, you don't need RCD in new CU

 

[chtangelus]

No I did a 20 amp radial socket Zs reading 0.79 and 6 amp lighting Zs reading 0.58

 

[chtangelus]

Swa is RCD protected, Ze : 0.20
R1+R2 SWA : 0.25

highest R1+R2 lighting : 0.17

Highest R1+R2 socket : 0.36

 

[telectrix]

as long as the readings are below max. Zs values, which they clearly are, no prob. as you said earlier, it's the res. of the SWA pushing them above what you expected. can't see any problems there, except you probably fall into part poo for notification to LABC. only thing is your R1+R2 for the socket circuit seems a little high.

 

[chtangelus]

Any way to get out of the poo for the notification, planning to use the job for assesment?

 

[telectrix]

sshhhhh is the word