RCD TESTING ON A LIGHT CTC

[swes]

Hi again could somone please give me an idiots guide to rcd testing on a light ctc . I can only assume that with skt outlets the plug on my megger unstables the current do to causing an eatrh leakage ,Do you use the three probe leads on a light and what is the process of two or three way switching.

 

[flameport]

RCDs are tested at the consumer unit. Preferably with the circuit wiring disconnected from them.

 

[PrenticeBoyofDerry]

If the same RCD is protecting the socket outlets, you can test them at that point. Your testing the RCD not the circuit!

 

[Spark123]

You may also get away with using 2 wires with the Megger (Phase and earth), I know the MFT1552 I have works OK, I need the 3 wires for no-trip EFLI. Have a read of the destruction manual.

 

[Risteard]

RCD testing requires three leads.

 

[Spark123]

On my Megger MFT1552 it doesn't.

 

[Risteard]

On my Megger MFT1552 it doesn't.

I have a Megger MFT1553.

Black and green leads both can go to the earth bar, but still requires three leads. Are you sure you're referring to RCD testing?

 

[Spark123]

Yes, red to the phase conductor on the RCD outgoing, green to the earth bar and press test.
Just like in the pretty pictures here:
http://www.pat-services.co.uk/downloads/manuals/299_megger_1500_series_userguide.pdf

Have I just increased your work production level by 50% ?

 

[Adam_151]

Megger RCD320T also does 2-lead RCD testing... next he'll be telling us that there is no thing as a 2-wire no trip loop test

 

[Spark123]

Unfortunately the Megger MFTs do require all 3 leads for no-trip EFLI testing
My old Megger RCD/EFLI tester could do 2 lead no trip ELFI testing.