RCBO problems

[telectrix]

and another thought. check if there is any sort of continuity between one ring and another. it's within the realms of possibility that you have a neutral borrowed from one ring to another.

 

[chrisreid186]

i have the same kind of fault but with a rcd, even if i plug something into the ring with the mcb turned off it still trips the rcd, going back this weekend to have another look, i'm going to clamp meter the cpc to check for any high current there , let us know how you get on

 

[Octopus]

and another thought. check if there is any sort of continuity between one ring and another. it's within the realms of possibility that you have a neutral borrowed from one ring to another.

If you had a borrowed neutral wouldn't the "other" ring also be suseptible to tripping?

 

[antimatter]

Yeah definetly connected properly. These ones, type B have no functional earth.]


Yes they do.

Its to provide an electrical path when you press the test button. That's why its coloured cream and not green and yellow.

 

[IQ Electrical]

Yeah definetly connected properly. These ones, type B have no functional earth.]


Yes they do.

Its to provide an electrical path when you press the test button. That's why its coloured cream and not green and yellow.

I think you'll find the test button is purely mechanical, just releasing the latching mechanism.

 

[antimatter]

I think you'll find the test button is purely mechanical, just releasing the latching mechanism.

And your point is?

 

[IQ Electrical]

My point is that the test button creates an imbalance between line and neutral, through a resistor and checks mechanical operation only, it does not check or use any part of the earth system.

Pedantic yes but guys studying 2330, 2391 etc. need this level of accuracy.

 

[telectrix]

If you had a borrowed neutral wouldn't the "other" ring also be suseptible to tripping?

should think so, but stranger things have happened at sea.

 

[BLBelfast]

Yeah definetly connected properly. These ones, type B have no functional earth.]


Yes they do.

Its to provide an electrical path when you press the test button. That's why its coloured cream and not green and yellow.

No they dont . Some manufacturers do, some dont. this one controlgear or some other cheap ****e, dont.

 

[IQ Electrical]

The cream fly lead is to provide earth leakage protection under loss of supply neutral conditions.

 

[BLBelfast]

Is it not white?

 

[IQ Electrical]

Yours might be

 

[antimatter]

No they dont . Some manufacturers do, some dont. this one controlgear or some other cheap ****e, dont.

Wylex, Merlin, MK, crabtree, volex do provide flyleads, which manufactures dont?

 

[Marvo]

I think there was an issue with your quote tags, it looks like you're arguing with yourself

 

[IQ Electrical]

Devices that provide double pole isolation on tripping would not have a need for an earth fly lead.

 

[Sintra]

Have a look at this video.

 

[nickblake]

Wylex, Merlin, MK, crabtree, volex do provide flyleads, which manufactures dont?

Proteus contactum M2

 

[Engineer54]

Have a look at this video.

Typical!!! another manufacturer trying to cut there costs with there own misleading information. They want to remove a function that saves them money, but not you!!
Then go on to try and convince you that it's time and money saving for the contractor.
Not a mention that those RCBOs without the functional earth lead will cost any less than those With, that's because there isn't any cost saving...

It's all Money, money, money these days, paying more for less is the order of the day!!!!

 

[antimatter]

Devices that provide double pole isolation on tripping would not have a need for an earth fly lead.

Where in the OP does it mention Double Pole?

 

[IQ Electrical]

Where in the OP does it mention Double Pole?

I'm explaining that the earth fly lead is used in the event of a lost supply neutral but in the case of double pole devices this is not needed because in tripping condition, the neutral will also be isolated.

That is why many BS 61008 RCD's do not have an earth fly lead.