I'll just throw this out there.

buzzlightyear · Jan 24, 2023

When doing R1+R2 at the sockets what
Items do you use regarding leads or so.

Eddy Currents · Jan 24, 2023

Cross connect at the DB / CU then plugin the MFT at the socket

Or if you don't have one with your MFT you can use an adapter

buzzlightyear · Jan 24, 2023

I have got the adaptors all the gear. So came with a idea. So I'm waiting for the gang to tell me what they use.

SparkySy · Jan 24, 2023

I've been using these for a while now and find them good!

Kewtech R1 + R2 Jump Leads

KEWTECH R1 + R2 Jump Leads Kewtech jump leads are designed as a alternative to termination blocks used when testing and performing R1 & R2 tests. They significantly speed up testing time, and an essential tool when carrying out ring mains testing. Order Code: JUMPLEAD1 - LD1 #html-body...

www.test-meter.co.uk

I did see an Efix vid a while ago that had some magnetic ones that fitted in the cable terminal screw hole. Not seen or tried them though!
Sy

timhoward · Jan 24, 2023

OR

I have a (marked!) 3-pin plug with L-E link in.

SparkySy · Jan 24, 2023

Ah I have a breakout 13a plug like the one @Eddy Currents posted above and then a short patch lead with 4mm banana plugs on each end for such tests. Like these below but from cpc, just can't find them on their website atm.

R-TECH 524594 Test Lead 50cm 4mm Stackable Plugs Green, 15A 30VAC/60VDC | eBay

TheR-TECH 524594 Test Lead 50cm, 4mm Stackable Plugs, Green is a good quality 4mm stackable plug connector test lead, comprising a 50cm cable fitted with a 4mm banana plug at each end. Gender Plug, stackable.

www.ebay.co.uk

timhoward · Jan 24, 2023

Failing all else...
Rub the lamp. A wet-pants appears. Get him to wire up the last socket. You can pretty much guarantee a Live-Earth short.

SparkySy · Jan 24, 2023

Saying that a wet pants filled one of my sockets with water today and didn't say anything!
Didn't notice until I went to switch the cooker hood light on so I could fit the hob and it didn't work!

Eddy Currents · Jan 24, 2023

timhoward said:
I have a (marked!) 3-pin plug with L-E link in.

I have used this method too which makes it easier for large boards, so all testing done at board while someone runs around with the plug
Also good for confirming circuit identity without having to disconnect anything

pc1966 · Jan 24, 2023

timhoward said:
I have a (marked!) 3-pin plug with L-E link in.

Some of the croc leads would be handy, but hardly something I do a lot of.

The linked plug seems a good idea, as usually I linked L-E at the DB using some Wagos and then measured at the plug, but reversing makes sense and could well be easier. You can have a small fuse like 3A and null the MFT leads clipped to on the plug's pins for accuracy to remove the fuse's resistance.

Not that a younger me would ever have used a linked plug solely for blowing supply fuses at places I disliked...

lozarus · Jan 24, 2023

I go for the 13a plug with L-E linked out. I have another with L-N linked out (theyre lovely old bakelite items so they stand out and obviously labelled). I wrestled with finding an easier way to test - as some of our boards are busy to say the least.

littlespark · Jan 24, 2023

Same. Labelled plugtop with 3 tails hanging out that can be shorted with a lever wago.

MFS Electrical · Jan 24, 2023

SparkySy said:
I've been using these for a while now and find them good!

Kewtech R1 + R2 Jump Leads

KEWTECH R1 + R2 Jump Leads Kewtech jump leads are designed as a alternative to termination blocks used when testing and performing R1 & R2 tests. They significantly speed up testing time, and an essential tool when carrying out ring mains testing. Order Code: JUMPLEAD1 - LD1 #html-body...

www.test-meter.co.uk

I did see an Efix vid a while ago that had some magnetic ones that fitted in the cable terminal screw hole. Not seen or tried them though!
Sy

I do like these kewtech crocs myself the magnetic one looks good but can’t help but think the connection wouldn’t be as good especially after it ends up with metal filings all over the end

LastManOnline · Jan 24, 2023

littlespark said:
Same. Labelled plugtop with 3 tails hanging out that can be shorted with a lever wago.

My favorite.Plus I drill 3 little holes in the plugtop just above the L,N and E terminals.It facilitates other basic testing as well.

timhoward · Jan 24, 2023

One advantage to linking out the far end of a radial circuit using a means that allows it all to remain assembled is that you can do IR tests first and then use the remote link for both R1+R2 and to obtain a reliable high current Zs:
Do IR tests (with CPC connected at board). Fit Link at far end.
Test R1 to CPC bar and get R1+R2. Assuming it's ok....
Test R1 to top of isolator (which is live) and get reliable high current Zs.
On a Megger the lead setup is the same for all of these tests, you are just changing a clip to a probe for the 2nd two and changing function.

Pretty Mouth · Jan 25, 2023

I link out at the board with kewtech jump leads as in post#4, and test at each point using a kewtech socket adaptor, similar to post #2.

Perhaps I'm missing a trick here, but I can see problems with using a linked out plug for this? Surely each time you move the plug to another point on the circuit, you have to walk back to the board to confirm the reading on the MFT? Also, without disconnecting the CPC from the board, would parallel paths not be more likely to skew the results?

littlespark · Jan 25, 2023

There may also be a pedantic Peter that says the tests won’t be valid as the linked out plugtop isn’t a proper piece of test equipment…. Not authorised adaptor etc

timhoward · Jan 25, 2023

littlespark said:
There may also be a pedantic Peter that says the tests won’t be valid as the linked out plugtop isn’t a proper piece of test equipment…. Not authorised adaptor etc

Maybe they would accept a 4mm plug-top adapter and a standard test lead between L and E

Pretty Mouth said:
Surely each time you move the plug to another point on the circuit, you have to walk back to the board to confirm the reading on the MFT?

If working alone, yes.
I sometimes take the tester when plug is fitted, and test each point to the far end of the circuit on the way back, checking for a sane increase each time. All depends on size of installation.
If it's a complicated circuit with branches I'd revert to normal methods though!

Dustydazzler · Jan 25, 2023

Old 13amp plugtop with a link between L-E , plug this into a socket and test at the board

buzzlightyear · Jan 25, 2023

pc1966 said:
The linked plug seems a good idea

That's what I made one yesterday by soilering the link to earth and live with out the fuse..

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