Aw nuts i guess that means the one i just ordered (cheap) is now already out of date...... Any idea on what has changed?
pretty much the whole ruddy book
take table 7.1 for example
you know, you select a MCB size (after calculating your Ib), select your Iz cable size, look accross to TNS or TNCS, decide if its 0.4 or 5 seconds disconnection time, and it tells you you can have 64M or whaterver
Based on the R1+R2 briniging it under the max Zz and the Vdrop comlying with 4 %
but now:
the Zs value has changed
0.4 and 5 seconds criteria has changed
differnect vdrops for lighting and other circuits, and different again for public/private supply
So that table has to be split up, changed, modified
And the old one is abourt as much use as a Chelsea penalty taker (ouch!)
thats just one example!
RCD requirements for TT are out the window (100mA etc)
sp basically, do what Luke did
Just pour milk over it
