Rcbo

[Sparkypaul11]

Quick question guys, something I've never really looked into....

Why does an RCBO have a functional earth but an MCB and an RCD don't since an RCBO is a combined RCD and MCB??

 

[Lizard King]

As far as I'm aware, an RCBO will protect against:

* loss of earth
* loss of neutral
* reverse polarity

The functional earth (cream sheath) should detect if a neutral is lost. Without this lead the RCBO might not detect earth leakage in the event that the supply neutral is missing (unlikely I know....)

If you connect the earth and disconnect the neutral once you put a load on an RCBO it should trip due to the inbalance between the phase and neutral.


LK

 

[Golden_Boy]

As far as I'm aware, an RCBO will protect against:

* loss of earth
* loss of neutral
* reverse polarity

The functional earth (cream sheath) should detect if a neutral is lost. Without this lead the RCBO might not detect earth leakage in the event that the supply neutral is missing (unlikely I know....)

If you connect the earth and disconnect the neutral once you put a load on an RCBO it should trip due to the inbalance between the phase and neutral.


LK

How How and How?