Have a customer telling me he is having multiple arcfault breakers trip at the same time. The service is brand new. 400 amp 320 continous underground with a pedestal meter. Two 200 amp main panels in the basement with two 100 amp sub panels located different parts of the home. He’s finding tripped arcfault in all four panels at the same time. I’m at a loss. This has now happened three times since he moved in end of August