Just an enquiry,does anyone here know of the name of the product that resembles a cement or concrete with some mettalic compound in it that helps you out if you got a really high RA reading off an earth spike?.
yes mate, its called running out of sand and using alli fileings... (might be one to try actuly....) ss
Evenin m8 how we doing?...thing is I am in the middle of a job and after banging a rod in I got an Ra of 300 ohms! everything checked out,heres me thinking,I cant keep banging loads of rods in this guys garden or else its gonna end up looking like the Avebury stone circles!! Saying that though,with that reading and a bit of Maths gives me...Ra*I^n < 50 V so 300*.100=30 so to me it complies. Would be nice to get it down it bit more!
Be carefull with your readings as the guidence note 3 inspection and testing states that any thing over 200 ohms should be classed as unstable try putting in parralel earth rods but not to close to each other
Sorted it! The connection on top of the earth clamp was the prob... Gave it a real hefty tighten-up and we now got a satisfactory 37 ohms,bit weird I know! Just had my Robin callibrated and tested my own Ze (.08) Many thanks all for the input though all, SF
...try putting in parralel earth rods but not to close to each other But not too far apart either, lest a nearby lightning strike sets up a significant PD between the two?