Fire investigators have not found Edison responsible for the Eaton Fire — but mounting lawsuits heighten concerns about its potential liability for the deadliest and most destructive blaze since the state created a fund to prevent wildfires from bankrupting utilities.

The county says electrical equipment owned by the electric utility is to blame for the blaze that killed 17 people and destroyed 9,400 buildings.

The lawsuit blames SCE’s equipment for triggering the deadly blaze that cut a mammoth swath of damage through the unincorporated community of Altadena.