Oiler1fan

Happy to report this morning that all is good ????????

Normal service has been resumed, N-E bond restored and polarity corrected.  All circuits running fine with the 50A RCBO as you suggested it should.  Now to wait for darkness to fall to search for glowing LED's ????.  Appreciate the input from everyone for a fast solution ????????

Our PEA neutrals are white striped

Polarity at the meter is fine, they reversed it at the breaker as the final step.  They marked the Live with red tape at my instruction and then connected to Neutral.  He is on his way here now to fix it, we will also reinstall the N-E bond and check the RCBO operation, if a problem will put the standard breaker back.

OMG - the polarity on the main breaker is reversed and N-E is 226V ????

Forgot to mention the polarity is ok too, that was the first thing we checked.  Going to measure N-E and get a pic now.

The N-E bond was in the correct location before the incoming breaker, I verified that before the job started.  I'll check the N-E voltage and get a pic of the board this afternoon.

Thanks for the feedback, yeah de-bonding the MEN link was a red flag, interested to hear @Crossy opinion on options.

Being safety minded, I wanted to add RCBO's to some of my house circuits - washing machine, kitchen plugs, exterior plugs, water pump.  Our area is standard TNC-S with MEN but my sparky discovered that the house is wired with many shared neutrals so he could not install the RCBO's on three of the four circuits.  He said a problem he sees a lot.  Next best option was to install a 50A 2P main breaker RCBO which I had waiting for another project - but to do this he said he needed to remove the incoming neutral from the ground.  OK I said not really understanding the reason why, he just said to avoid nuisance trips.  All was good after circuit testing but now tonight I have three LED lamps that don't shut off completely, it's like they are on a very low dim.  Your expert guidance needed please ????????

As a Canadian expat in Saudi with a Thai wife I can tell you that statements made here are incorrect. All people boarding repatriation flights to Thailand from Saudi are required to have Covid tests within 72 hours of departure, regardless of nationality or reason for traveling.  This must also be complimented with a fitness to fly certificate, Embassy approvals and confirmed ASQ booking for non-Thais. You can rest assured that no one is leaving Saudi with a known Covid problem and the effort required to get all the clearances discourages all those that don't have an urgent need to travel.