Why do MCB's buzz?

[La Poste]

A mate of mine has quite a few 12v low voltage down lighters installed on a 6 Amp MCB BS60898 Contactum brand.

When he switches the load up IE he switches the dimmers of the lights to full power the MCB buzzes like mad, in fact the buzzing increases at the same rate as the power is increased, both in equal measure.

I have looked at loose connections on the buzz bar etc but everything is tight.

Does anyone have an opinion as to why the MCB is buzzing so much?

It really is quite noticeable.

Thanks.

 

[Guest123]

Could it be because they are type Bee's.......:rofl:

I'll get me coat.:bucktooth:

 

[telectrix]

The circuit at full load pulls 8.04 Amps on a 6 Amp breaker, the higher the Ampage the louder the buzzing.

try a 10A MCB for starters