oxford 12

[oxford 12]

what is the max value for earth rods,when filling out niceic test sheets.my quallifiing supervisor says its 100ohms
:93:

 

[sparks_114]

The maximum permitted under BS7671 is 200 ohms beyond which it may not be stable. I know NAPIT want it at a 100, not sure about the NIC though!

 

[Sparky Ninja]

NICEIC tried to push the 100 ohms for many years, BS7671 2008 finally introduced a figure for us to abide by and it is 200 ohms.

 

[johnboy6083]

when i install rods, i go for as low as possible, and havent come across one over 60 ohms yet. please read this also http://www.electriciansforums.net/e...gulations/26532-earth-resistance-testing.html , its very good reading if your dealing with earth rods and the like.