Zs on TT

[i=p/u]

What is the point in carrying out zs on TT system other than verifying a loop.
We got an Ra of 14.8 but when all bonding is in place it comes down to 1.9 ohms for most circuits zs results. I just don't see the point if rcd protected .

 

[Badged01]

What is the point in carrying out zs on TT system other than verifying a loop.

Unsure whether this is a wind up or you just dont know what Zs is for ......

 

[i=p/u]

What I'm saying the main switch will always trip b4 any breaker...

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As it's an rcd

 

[Billythekid]

What I'm saying the main switch will always trip b4 any breaker...

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As it's an rcd

And if the RCD fails to operate?

 

[ipf]

What I'm saying the main switch will always trip b4 any breaker...

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As it's an rcd

What about overload.......come on !!!

 

[DPG]

This should be an interesting thread. Daz

 

[MDJ]

Yes I was just thinking the same Daz LOL

 

[i=p/u]

Well forget overload , yous going off in your own tangent.

 

[Simonslimline]

If you didn't measure it then how would you know what the reading would be?

 

[Badged01]

If you didn't measure it then how would you know what the reading would be?

And what value would be acceptable ......

 

[i=p/u]

The rcd main switch is going to trip on fault current even before the mcb reach full operating current. So the trip times arnt met. Geeees are yous on the ale everyday.

 

[i=p/u]

On a TT system we rely on rcd as disconnection times arnt always met..

 

[Badged01]

Geeees are yous on the ale everyday.

Only on the days after I draw the dole ......

 

[ipf]

Well forget overload , yous going off in your own tangent.

:biggrinjester: Bit for that one. Getting on to trig now, are we ?

 

[Badged01]

:biggrinjester: Bit for that one. Getting on to trig now, are we ?

Nope. Thinks he's talking more scalar than vector .....

 

[i=p/u]

Your ever here the song , where's your head at , where's your head. I singing it.

did I not word the question right?? I know you English are slow, like uh hmmm errrr.



what is the point of zs test on a TT system with 100mA rcd an Ra of 14.1 ohms. . Think a 1A fuse might trip without help of rcd.

geeeeeeeezus

 

[i=p/u]

I know I ain't the brightest spark, but I don't know how you can't get what I'm saying without going off about overload, irrelevant.

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Maybe answering my own question and yous all laughing ..

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Yehaaaaa

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Gonna have bottle of wine and forget this thread,

 

[JD6400]

I know I ain't the brightest spark, but I don't know how you can't get what I'm saying without going off about overload, irrelevant.

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Maybe answering my own question and yous all laughing ..

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Yehaaaaa

No offence meant fella , but that did make me laugh !

 

[i=p/u]

Do you understand what I'm saying?

again for the brain impaired.

what is point in zs test on TTsystem , that has 100mA rcd and Ra of 14 ohms

 

[i=p/u]

I'm whistling the wife to be , yous e buddies arnt with it the night.