Just wondering if anyone can help! I have had a heater fitted for my swimming pool. Right here goes I have got a 6kw 19amp heater so this is running on a 32 amp mcb and I also have a 20amp mcb just to run one socket for my pump. It has a 63amp mcb fitted with I think a 60 amp cable running to the mcb and 30amp cable running from the mcbs. This has been up and running for 3 weeks now. No problems with tripping mcbs or rcd. So I came home today the heater is not working the pump not working, so thought check the mcb and rcd. None of them have tripped either. Could this be a problem with the rcd that is connected. I'm confused as nothing looks damaged or lose in anyway so really not sure what the problem could be. Any help would be great.