Useful Information for Electrical Form filling to BS7671

[WhiskeyDog]

Very useful, well done. Passed it on to my mate saves him calling me regularly to refresh his (failing) memory. Thanks

 

[cjp1]

Many thanks for the useful info .

 

[todspark]

great thanks:wings:

 

[freedom]

Thank you, top man . I am an electrical engineer from china, now there is a big project which have been undertaken by our company in oman, so i want to learn more electrical knowledge by this forum ,now i am very happy ,i have found it

 

[nickwright24047]

great info very usefull thanks

 

[ebow72]

Thanks for this gem of info!

 

[aivasr9]

Need some help.
On my test sheets is box marked :circuit impedance:what figures should
i write down there.
Thanks

 

[ebow72]

What test sheet are you using? Do you mean Earth fault loop impedance?

 

[aivasr9]

No,besides Zs,Ze there is a box marked; circuit impedance;

 

[ebow72]

So you're looking at a Domestic Electrical Installation Certificate? And in test results section with a heading 'Circuit Impedance's'

Ring final circuit continuity Continuity low ohmic reading (0.18)(0.18)(0.31)
(R1 + R2) or R2 low ohmic reading (0.14)
Zs low ohmic reading (0.37)
Insulation Resistance High ohmic reading obviously greater than 1M ohm as BS7617 but an off the scale reading for a new installation..
Each installation will differ, obviously, I hope this is what you are after...

 

[aivasr9]

Thanks,actually this is new install,commercial property,all ckt are radial,i have never seen that kind of box on test sheets,little confused

 

[ebow72]

There are quite a few made from various companies, Di Log, NICEIC, Nappit and so on...
No worries glad to help

 

[aivasr9]

Thanks

 

[NickS]

a very welcomed piece of info, ta very much

 

[euron]

Thanks. Printed Laminated. Cheers.