I posted another thread about this but i couldn't respond to it for some reason (each post needing moderator review), hopefully that won't happen here.

Ok so i'm in the UK and have a major problem with the electric box tripping. When i have around 3.5 kw of stuff plugged in the box trips and i can't find a way to stop it.

I am using contactors for the items which draw a lot of power so that isn't a problem and there are no shorts or anything. It's only when i draw more than about 3.5 kw it happens.

Anyone know a fix for this?

Thanks.