Lighting help

[P123456]

Hi there.
We installed power to our garage (lights and sockets)
SWA runs from a 40Amp breaker in the the board out to a mini board in garage.
Sockets are wired to 32amp which work fine BUT light wired into 6Amp keep tripping the main board in the house.
They're 2 strip lights.

Any reasons why the lights keep tripping ?

Thanks

 

[timhoward]

I've recently found out that the guy who installed the SWA didn't have enough cable and instead of connecting in a resin joint he used a connector block and taped it up which I've now found.

Little thought that occurred to me randomly this morning....
Is it 3 core SWA or 2 core SWA?