On the way home.

[electrician786]

^ ouch, easy steps.

 

[Sharpend]

^ ouch, easy steps.

Sometimes the truth has to be said, that's why it hurts!!

Reality is this shows that short courses don't work. You may learn the theory from the books but we all know it takes working with someone you can learn from to make you understand it in real life situations. Sorry to say badfish as I don't know your background and respect for wanting to learn, but I'm not sure learning at the cost of the customer is the correct way.

 

[batty]

I can say MEM RCBO pods don't like being tested at the mains you actually have to test them at a socket or light to get them to function correctly. Probably no help are you batteries OK on your meter?

 

[husky2013]

This may sound strange but college recently switched to us working on hager boards, and we actually had a few faulty 30mA RCD's that where in fact faulty.

the problem was mentioned as a few things, when testing they would only trip at 5x and the test button would not function!

might be worth contacting hager directly or your wholesaler and see if they can shed any light on it, otherwise as a few others have said, continue testing

perhaps remove all ccts, and then place each one onto that particular rcd and test that way then you could also isolate it down to a potential faulty cct!

 

[kme]

If I have this correct:

an RCD on one part of a dual DB won`t trip at 1XIn , but will trip at 5xIn

On t`other part of the same Db, it works fine.

You`ve got ALL outgoing connections removed from the RCD / location in question.

^ If this is correct - there are only a VERY limited number of possibilities:

1. Your tester / batteries have a problem.

2. The flexies to the RCD have a (currently unimaginable) problem.

3. You`re doing something wrong.

Item 2 is unlikely - an issue with these would present other problems, which you`d have found much earlier in the testing sequence.

That leaves 1 or 3.

I`m not a betting man, but if I was....................................................... :coat

 

[m4tty]

Let us know how you get on bad fish mate

 

[Steve3948]

What is the RCD spec rating etc ?

 

[sb_89]

Could be as silly as having your mft set to test at 10ma rather than 30ma !

 

[davetheglitz]

Sounds like a TT system with a N-E fault.

Switch off RCD and try N-E insulation.

---------- Post Auto-Merged at 13:17 ---------- Previous post was made at 13:09 ----------

I can say MEM RCBO pods don't like being tested at the mains you actually have to test them at a socket or light to get them to function correctly

I've found this on some RCBOs as well - can't remember the make and certainly can't explain it!