Buzz from celing rose

[AdamNichol]

Got a bit of an ongoing saga with a replacement hallway light.
Bought a five bulb hallway light to replace an old single bulb one. Removed the original ceiling rose and have wired the live, neutral and earth wires into the connector block correctly. The connector block sits in the hole in the ceiling and the other wires are kind of mashed into a shallow chrome rose.
One bulb blew twice within a couple of days, so I ensured all the connections were well spaced and anything even remotely exposed was smothered in electrical tape.
Now I have detected a buzzing noise coming from the rose (but not the switch; which is also a 2-way switch for the landing light), and there is a mild vibration (can be felt but not seen).

Any ideas as to a cause or cure?

Thanks, Adam

 

[RF Lighting]

Does the fitting contain a transformer?

 

[AdamNichol]

Not that I can see. The L N e wires come out of the ceiling straight into the connector block. The fitting itself has 5xL wires; 5x N wires; and an Earth, all of which go straight into the connector block. Beyond that there are 5 'spokes' that extend out from the rose, each ending with a bulb. Each spoke has an L and N wire; and the E is screwed directly to the rose.
Not a lot of space anywhere else.

Cheers, Adam

 

[securespark]

Do you have a dimmer in circuit?

 

[AdamNichol]

Hi,

No dimmers on the crcuit, just a two-way double switch.

Thanks

 

[JohnD]

what sort of bulbs?

If you press your thumb on the rose, does the buzzing stop?

 

[sparkyspike]

Last time I heard buzzing coming from a rose, it turned out to be a bee.

Not very helpful, I know.

 

[AdamNichol]

Hi,
I'm using 40w golf-ball bulbs.
If you press the rose, the noise dies down, but you can continue to feel a weak vibration through your fingers.

Thanks, Adam

 

[bernardgreen]

You haven't left a magnetic screwdriver tip or any other magnetic material in rose have you that is "motoring" on currrent in the cables.

Is the frequency of the buzz constant ? ( at 50 or 100 per second )

I assume the buzzing stops when light is turned of and is not a draught of air russling something in the rose.

 

[JohnD]

might be a steel screw or other steel part that is loose and vibrating.