High Integrity Earthing

[Wilko]

Hi - sorry if you've already seen it @Electro-tech, but for the socket outlets on RFC check out 543.7.2.201 and part (i) particularly. This means outlets need re-terminating etc rather than new cpc needing to be run in. Tin Hat on.

 

[Electro-tech]

We need to know how this leakage has been measured, combined across all final circuits?

Hi Guys, Thanks for the replies. The measured Earth leakage was a combined reading with a Megger DCM300E Earth Leakage Clamp meter on the 16mm cable from MET in the DB. I could not test each circuit as I need to power down to open up the DB out of hours at the weekend. Can't risk knockin a RCD test button while in use.I honestly think that the installation Earth integrity was not designed for IT office use in the first place. I would like to see a 4mm cpc installed .You can tell that the installation overall was not installed correctly going by the T& E runs stuffed in plastic conduit . Main runs are T&E in metal trunking,why not singles. I will measure each circuits leakage separately at the weekend & report back.

 

[Electro-tech]

Hi - sorry if you've already seen it @Electro-tech, but for the socket outlets on RFC check out 543.7.2.201 and part (i) particularly. This means outlets need re-terminating etc rather than new cpc needing to be run in. Tin Hat on.

Okay Wilko noted, but if you have dado trunking while re-terminating the outlets I would like to run the 4mm. The only thing that I do not know at the moment is, are there 1 or 2 earth terminals on the existing accessories?

 

[westward10]

You definitely need to assess each final circuit before deciding on any works as they may not be required.