Been on a job today and debating what to put on the certificate.
The DNO in early 2013 upgraded the supply and installed PME. The previous setup had an earth rod installed. This is still connected to the main earth terminal. Not sure what type the previous set up was as the customer is none the wiser, As the upgrade was done just before she bought the house.all she cared about was that things come on and turn off when required.
I am only filling in a minor works certificate as it only involved extending a radial.
In terms of earthing arrangement would you all agree i have been okay to record it as PME with a supplementary TT rod. making a note in the comments box mentioning there is a rod aswell? Guess it will be 18th edition compliant before its time!
I have so far filled it in as a PME system and am wondering if in addition to recording the Ze of 0.29 ohms i should record Ra aswell? I haven't measured it as of yet as i went with its a PME with supplementary rod.
I have to go back Monday next week to change a light fitting, so can measure Ra if needed.
It does raise the prospect of whether the certificate forms will be updated to reflect 18th edition if supplementary rods are going to be needed.
Thoughts welcome as it is something I haven't dealt with or potentially noticed before as most of my experience is light commercial such as pubs.
The DNO in early 2013 upgraded the supply and installed PME. The previous setup had an earth rod installed. This is still connected to the main earth terminal. Not sure what type the previous set up was as the customer is none the wiser, As the upgrade was done just before she bought the house.all she cared about was that things come on and turn off when required.
I am only filling in a minor works certificate as it only involved extending a radial.
In terms of earthing arrangement would you all agree i have been okay to record it as PME with a supplementary TT rod. making a note in the comments box mentioning there is a rod aswell? Guess it will be 18th edition compliant before its time!
I have so far filled it in as a PME system and am wondering if in addition to recording the Ze of 0.29 ohms i should record Ra aswell? I haven't measured it as of yet as i went with its a PME with supplementary rod.
I have to go back Monday next week to change a light fitting, so can measure Ra if needed.
It does raise the prospect of whether the certificate forms will be updated to reflect 18th edition if supplementary rods are going to be needed.
Thoughts welcome as it is something I haven't dealt with or potentially noticed before as most of my experience is light commercial such as pubs.
