Circuit breakers

[Canarycity]

It has been pointed out to me that the circuit breakers are safe but I should take into account the type fitted are no longer the industry recommended practice.

The circuit breakers fitted are a single module with a switch neutral and I should consider changing to double pole versions.

Has anyone else come across this?

 

[TonyJones]

New one on me Adrian.
I know there's a difference between UK and Continental practice on this, which is why EHUs "over there" are oftne wired (as we see it) wrong way round - they don't worry which is live and which is neutral, because the switches on their appliances break both wires,
Sounds to me as if the "double-pole" circuit breakers might be related to that issue, but I've only a basiic knowledge of electricity.

 

[Canarycity]

Hi Tony

The only thing I can think of is that the type of breaker I have is going out of production and to fit double pole breakers would mean a new consumer unit.

But you could be right about being on the continent.

 

[cflatters]

Hi folks
The use of DP (double. Pole) circuit breakers does improve safety, it ensures that both live poles of the mains supply are disconnected in the event of a fault regardless of whether the L&N (live and Neutral) inductors are wired with the correct polarity

As for whether Motorhome fuse-boxes can accommodate DP devices I am unsure, but would suggest that your main CB should be a DP RCD at the very least !

In the UK, both live and neutral conductors are classed as live conductors under BS7671, a standard which covers electrical safety in buildings and also extends to the fixed (non automotive) electrical wiring in mobile accommodation including caravans and Motorhomes etc.

C J Flatters.
Electrical Consulting Engineer

 

[cflatters]

There are simple plug-in testers you can plug in your 230v 13A socket which will verify instantly if your polarity is correct !

A worthwhile investment if you are travelling

If you use 230V in your awning it is even more important that you are protected by a DP RCD (Residual Current Device) with 30mA sensitivity for safety !