Continuity on isolated circuit

[eltel10]

Hi a DIYer here,
I am planning on adding a socket spur to a ring circuit.
I isolated the MCBs and RCBs and main switch at the Consumer Unit.
I tested (using the voltage and continuity tester seen below in the video) if there was isolation there and all was in order.
When I got to the socket, I had the continuity buzz when testing N/L, E/N and E/L. The same was evident on another socket in the ring.
I did not attempt any electrical work.
I tested the shower switch - different circuit to plugs and there was isolation with no continuity showing on the tester.
Any ideas what is going on here?
Cheers.

 

[James]

Testing for a voltage between live and N then between live and earth should prove that the circuit has been isolated from the electricity supply.

When measuring continuity , what you are checking is wether the cable attached to one meter probe has. A connection to the cable attached to the other meter probe.

If there are any devices plugged into the socket circuit that you are testing, they will be making a connection between live and N on that circuit.
Such as a table lamp, there is a thin wire element that joins live to N,

I appreciate it seems easy now days to watch a few YouTube videos to learn how to diy electrics, your understanding of these things seems rather low at the moment.
I have answered your question to raise your knowledge but not necessarily to encourage you to continue this work without assistance.

Is there any chance you could ask a professional to assist you on this one and you may well learn a lot in the process.

 

[eltel10]

Testing for a voltage between live and N then between live and earth should prove that the circuit has been isolated from the electricity supply.

When measuring continuity , what you are checking is wether the cable attached to one meter probe has. A connection to the cable attached to the other meter probe.

If there are any devices plugged into the socket circuit that you are testing, they will be making a connection between live and N on that circuit.
Such as a table lamp, there is a thin wire element that joins live to N,

I appreciate it seems easy now days to watch a few YouTube videos to learn how to diy electrics, your understanding of these things seems rather low at the moment.
I have answered your question to raise your knowledge but not necessarily to encourage you to continue this work without assistance.

Is there any chance you could ask a professional to assist you on this one and you may well learn a lot in the process.

Thanks for the reply.

I did think it could be due to devices being plugged into a socket on the circuit. I did toy with unplugging everything afterwards and trying again, even though I'd turned off the FCU switches on the circuit beforehand. But after I made the video, I decided to post here and get a respected opinion from an electrician.

Regarding a professional, I would have to bring an electrician in.

Yes, the YT videos give you the basics, hence my predicament.