Continuity, Polarity and Insulation Resistance of our 2 way and Intermediate Lighting Circuit

Students training aid for testing continuity of the CPC and polarity of a 2 way and intermediate lighting circuit. Full demonstration using a MFT Megger tester set on the ohms scale.

Demonstration shows how to set up your Megger MFT tester and carry out an insulation resistance test for a 2 way lighting circuit. Test voltage is 500V DC and the minimum acceptable value according to BS 7671 is 1 megohms with further investigation when the reading falls below 2 megohms. Also shows and explains the need to switch both 2 way switches into the other on position and repeat the insulation resistance test.

= 🕐 Time Stamps - Cut to the action 🕕 ==

00:00 - Testing for continuity of CPC, polarity and insulation resistance
00:32 - Setting the Megger MFT up to measure resistance
01:15 - Link the line and CPC together
02:37 - Continuity of CPC and polarity test
05:01 - Insulation resistance test

Videos are training aids for City and Guilds (C and G) and EAL courses Level 1, 2, 3 plus AM2, AM2S and AM2E.

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[jmohammad]

Love the back to basics testing of continuity, polarity & insulation resistance tests. Always good to have a recap and who better then Gaz to enlighten us. GSH all the way for me. Keep up the brilliant teaching GSH Team, much appreciated and valued.

[zoltantot]

I am preparing myself for AM2 exams, this video is exactly what I was looking for. Thank you so very much!!! This is Big Help!

Could you please make videos about fault finding on "S" plan Central Heating and Hot Water system?

[FootballRoundUp]

Amazing videos mate! Can you do some fault findings please.

[peanutpotion]

Hi, now the am2 requires you to go to the switches first carrying the neutral through to the light last

[sn]

HI,
There are so many variation of tests on lighting continuity tests! I do not understand which one to follow?
The one you are doing is R1+R2 for the lighting is different from the one in another video from some one els?

You did tests for continuity at the lighting terminal points but you also carried out tests on the switching terminals? for continuity. I have seen videos that they carry out tests either at the board end for R1+R2 for lighting continuity or at the lighting terminal points by joining either end with line with cpc. And they do not carry out at the switching terminal for 3 ways light switches. Why is that? Do they do wrong? or missing one part of the tests, the switches terminal? or that is still acceptable?

This really help if you can answer.

Thanks

[greenie]

Love how delicately the mcb is turned off 😂

[rosstin]

Do you need to remove the bulb in insulation resistance test?

[LocoSajoca]

When you test continuity on the intermediate switch, and you're probing the line terminal, which one is that? The brown or one of the cables (i.e. Black) with sleeving on? Or is would you just probe onto the common terminal? Cheers Gaz