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This is a situation crying out for more in-depth testing,including data logging,etc.
I hold minimal faith,in BG being capable of delivering this...
4 electrical checks - 3 by BG, last one by PH Jones.
What exactly regarding in depth checks are needed, so I can request these be made.
I feel responsible for tenant, as not fair they are living with RCD tripping constantly, and who knows how long Energy Ombudsman get to resolution, 8 weeks, after xmas!
 
As far as I know, mobile modems vary their signal strength based on the strength of the signal they receive, so if the signal is weak, they'll increase their output accordingly.
Yup, the weaker the signal the more power the send out trying to get good comms with the local mast.
 
Even if there is a neutral-earth fault downstream, there would still be no leak as long as there is no potential difference between earth and neutral.

If there was a neutral earth fault downstream e.g. shorted together then there would indeed be no PD but there would be earth leakage, it will parrallel the neutral return current through the cpc. If RCD protected then that would trip from the L-N inbalance
 
4 electrical checks - 3 by BG, last one by PH Jones.
What exactly regarding in depth checks are needed, so I can request these be made.
I feel responsible for tenant, as not fair they are living with RCD tripping constantly, and who knows how long Energy Ombudsman get to resolution, 8 weeks, after xmas!

To be fair, I think the BG spark has done what he can. He has taken Zs to prove effective connection to earth. He has taken IR at 250vdc. He likely selected 250vdc so he could test with loads connected to eliminate both wiring and loads for earth faults. Sensible. He has also ramp tested RCD.

I agree with others that it may well be interference from meter comms mobile being so close to RCD. IIRC the RCD in that board will be an MEM with a functional earth wire it may act like an antennae!
 
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Hi - From afar I guess we can never solve this, but there are couple more things for an Electrician to look at in my view. Did the BG Electrician actually personally observe the remote test and the tripping RCD? I would be seeking cooperation from the meter company with some more testing. Something like : Standing at the box with main switch, RCD and all circuits on, have the remote test done and observe the RCD trip. Reset RCD and turn all MCBs off and repeat the remote test and observe any trip. Safely remove the outgoing N from the RCD (still leaving all MCBs off) and repeat the remote test and observe any trip.
 
You need to find someone with an electromagnetic radiation tester to see what the meter output is.
 
Probably not the kind of advice I should be posting on the publicly viewable forum but I'd either relocate the meter a greater distance from the CU or I'd wrap the CU in thick tin foil with a bonding wire attached to it and see if the nuisance tripping stops. Obviously isolate, and do a risk assessment first etc.

Smart meters can have fairly powerful WAN transmitters and even GSM transmitters which could cause issues with RCD's if in very close proximity.

1. The CU is in a daft place - and shouldn't really be in the meter cupboard
2. Would changing it to a AMD3 board help
3. Could the SM be disabled for a set period to see if the tripping stops?

Interesting thread..........
 
Hi - From afar I guess we can never solve this, but there are couple more things for an Electrician to look at in my view. Did the BG Electrician actually personally observe the remote test and the tripping RCD? I would be seeking cooperation from the meter company with some more testing. Something like : Standing at the box with main switch, RCD and all circuits on, have the remote test done and observe the RCD trip. Reset RCD and turn all MCBs off and repeat the remote test and observe any trip. Safely remove the outgoing N from the RCD (still leaving all MCBs off) and repeat the remote test and observe any trip.
@Wilko
Yes, BG actually observe top-ups causing trip.
Re: Remote Testing - E.org electrician change SM-tripping worse, but he could not touch CU/domestic side. So as per Wilko above, E.org electrician himself suggested that if I got an Electrician out that day, the two could work together - he work on the SM, while my man work on CU/domestic side. PH Jones electr1.ician comes and E.org electrician not contactable! PH Jones confirm 4th time, domestic side all ok.

@Murdoch
Re: On Demand test - yes, every time E.org did test while I on call with them, RCD trips
1. Yes, CU is in daft place
2. AMD3 board help - no idea as I am ignorant
3. I suggested replace SM with Dumb meters but E.org rejected idea, unless I pay cost. But, will ask Monday if they can remotely switch off SM and make it Dumb Top Up

Pictures below CU open
Only RCD - red middle switch trip
Also, tenant tells me today, that when trip happens - Plug circuit all off, But Light circuit stay on (lights work).
Smart Meter Tripping RCD elecforum CU Red - EletriciansForums.net Smart Meter Tripping RCD elecforum CU - EletriciansForums.net
 
Ines Spires: Some thoughts:

1. Box in the area beneath the consumer unit and place some security seals so that it is obvious if anyone has attempted access.

2. Demand from the energy supplier confirmation that the anti-tamper features of the Secure Liberty 100 are working correctly and that the meter is not suffering from spurious tamper alerts. Are they receiving tamper alerts? Ask them what happens if a single tamper alert is reported to them; does it simply log the alert or is the supply shut off briefly and then restored. If there is a series of tamper alerts what happens?

3. Real tamper alerts are covered by (1) above.
 
Also, tenant tells me today, that when trip happens - Plug circuit all off, But Light circuit stay on (lights work).
Of course. It’s only the sockets (to the left of the RCD) that are protected by the RCD.
The circuits to the right of the RCD do not have RCD protection. Don’t know why the labelling has been crossed out.
 
Ines Spires: Some thoughts:

1. Box in the area beneath the consumer unit and place some security seals so that it is obvious if anyone has attempted access.

2. Demand from the energy supplier confirmation that the anti-tamper features of the Secure Liberty 100 are working correctly and that the meter is not suffering from spurious tamper alerts. Are they receiving tamper alerts? Ask them what happens if a single tamper alert is reported to them; does it simply log the alert or is the supply shut off briefly and then restored. If there is a series of tamper alerts what happens?

3. Real tamper alerts are covered by (1) above.

1. and 3. A second E.org electrician came after I demanded a Deadlock Letter. He did not change the new SM but did the following "removed the old anti tamper block and installed new 1 and 2 tails" as a free complimentary service. Not sure what that means. Picture below is before he did remove and install.Smart Meter Tripping RCD elecforum Liberty 100 SM next to RCD - EletriciansForums.net
 
Ines Spires: Further thoughts for what you might ask the energy supplier.

1. Is the enclosure containing the consumer unit and meter made of metal? With the door (is it made of metal too?) shut the meter will/may have a difficult time transmitting and receiving signals, especially if the cellular network coverage is relatively poor at the property. Ask the energy supplier what the meter is programmed to do if there are no signals received from the meter or if the meter does not receive any signals for a 'prolonged' period? Ask this because inside the Liberty 100 is a big switch which is normally 'on' but can be turned off either remotely or by the computer inside the meter.

2. Find out what happens if the credit available in the meter runs out. Does the meter cut off or the supplier remotely cut off the electricity supply? What I am wondering is whether the App top ups are not being received by the meter (or intermittently) so the meter runs out of credit and turns off the supply which causes the RCD to trip. But you said the lights stay on - so maybe there is a brief turning off of the the supply until the new credit is loaded or there is a reserve amount of limited credit which kicks in sufficient to keep the electricity on a little while until the meter is topped up so folk are not plunged into darkness. If there is a problem with cellular reception and the meter is inside a metal box then it could be the tenants have paid for a top up but the meter only receives it when the enclosure door is opened to reset the trip.

3. Ask your tenants by how much they top up the meter - large or small amounts. Then consider (2) above.
 
... If there is a problem with cellular reception and the meter is inside a metal box then it could be the tenants have paid for a top up but the meter only receives it when the enclosure door is opened to reset the trip.
Monday morning brilliance !!!
Not to make fun of the hardships endured by folks because of this fault, but your thought did remind me of those silly slapstick films ...
 

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