Not very impressive 300 ohms is a bit high maybe if its buried deeper it will be better think ide stick to rods if given a choice
If it's a consistent Zs reading of say 300 Ohms, it will easily satisfy the requirements of Table 41.5 up to 100mA operating current R.C.D.s, including the popular 30mA type. Of course I do not know if you radio people need a lower resistance to true earth for other reasons.
Not very impressive 300 ohms is a bit high maybe if its buried deeper it will be better think ide stick to rods if given a choice
If it's a consistent Zs reading of say 300 Ohms, it will easily satisfy the requirements of Table 41.5 up to 100mA operating current R.C.D.s, including the popular 30mA type. Of course I do not know if you radio people need a lower resistance to true earth for other reasons.
If it's a consistent Zs reading of say 300 Ohms, it will easily satisfy the requirements of Table 41.5 up to 100mA operating current R.C.D.s, including the popular 30mA type. Of course I do not know if you radio people need a lower resistance to true earth for other reasons.
Earth electrode resistances above 200 Ω are considered unstable. This is also stated in the notes to Table 41.5.
