New lights- tripping mcb

[Mo-S3]

Hi,
ive just installed some wire rope lighting in a large bedroom. In total its 600w. Now the problem is that every time i switch them on it trips the mcb. Sometimes they will switch on normally but most of the time it trips.
Ive tried disconnecting the transformers and have 4 running but its still doing the same. Even upped the 6A to a 10A but no use. These are the heavy duty wire wound square transformers mounted up in the loft.

What do do?

Is it ok to tap off a line from the ring main (Spur) put a FCU inline and then power up the lights? This is a last resort if possible in the hope that they dont continue to trip.
Thanks for any advice

 

[Mo-S3]

Oh forgot to add; this is a large house and when the cleaner switches the vacuum cleaner on the lights flicker (very very slightly). Any idea what would cause this?

 

[Mo-S3]

anyone? help?

 

[Jaymack]

It may be the initial current surge which is causing the trip. I would try a 6A type C MCB, assuming that your existing one is a type B, this has a "slower" trip curve and is commonly used for such situations.
This should be done only after a competent electrician has investigated the problem; and tested the circuit to ensure the new MCB will meet the disconnection times, for safety reasons.

Regards