Easy Tutorial: CPC & Polarity Testing for Radial Socket Circuits 

Rick loves his food 🥘

Great comment 😁

Thanks for watching 👍🏻

Great point James 👍🏻

It was but can be missed on a visual inspection when you see to browns and two blues 👀👍🏻

I am lucky got a plug in tester, somehow flipped live and neutral on a single gang socket once as the position of connection was mirror to some of the other brands I used

R1+Rn, the R1+R2 coupled with the visual inspection does. Just the R1+R2 on its own doesn't. As they said 2 tests and a visual is good practice for a polarity test

They sell them on the eFIXX store

It won’t prove polarity just doing that

@@efixx if you don't get an R1+R2 your polarity is wrong

@@cloud4344 but the line and cpc could be the wrong way around… watch the video it’s all explained in it

Guidance notes 3

100% that’s why visual inspection is more challenging 👍🏻

It was probably deliberate to show that visual inspection should be done first or to show it isn’t always done hence why we test the circuit. ? It no point testing then find you have go round removing accessories because your test results were wrong. But how did he get a positive result? On the last socket. ?

I notice that the socket front was wired incorrectly at 9.28... then noticed you have also noticed and commented... Well done.

Incorrect polarity but visually it looks correct

@@efixx no, visually it looks wrong 🤷‍♂️

what do you mean by this that electrical installation ls in europe are better?! in europe electrical installations are crappy! when you pull a plug from a socket, the socket comes out too. wobbly soclets, wobbly plugs 😂

I do this on radial circuits like cookers and showers. If the rn+R2 is higher then needs a tighten up switches or check other joints

@@jamesmoon5632 that's exactly what I use it for too 👍

From a technical standpoint, the test you've described produces a vastly similar result, but from the everyday use point of view. I'd just like to add a few points for consideration. The test itself is to verify the continuity of the protective (Earth) conductor, it's use as a method of proving polarity is just a little Brucie bonus. We only use the second conductor as a return path for the test current, otherwise we can use the R2 or 'Long lead' method. Additionally, the continuity of the CPC should be proven at all points of utilisation in a given circuit, the neutral conductor isn't always present at these, picture a light switch in a domestic dwelling wired using the three plate method or a final circuit feeding a three phase motor, traditionally there wouldn't be a neutral in these places, so the line conductor is a safe bet. Lastly, taking the resistance of the line and CPC, gives you a resistance value for the load side of the earth fault loop , when added to the external earth fault loop impedance (Ze or Zdb), we can use this as part of of a calculated Zs result, eliminating the need for testing on energised conductors where it may be difficult to do so in a safe manner. So it saves you a little time.

No, it's a great bit of kit, I used a slightly older model in the wild for quite a while to be fair. 😊

@@efixx anything to drag the test on ay it .... I'd find it mocking my intelligence just for a simple test that cud do it while it's hot with a plug polarity tester or multi meter but the zeroing the resistance is a good feature and should be on all multi meters