Jmccoll77
Member
- Location
- Longmont, CO, USA
One of my electricians did a panel and arc-fault upgrade on a condo complex that has a 120/208 system. The owner has a range that uses a 120v warming burner. The range is fed with a 4-wire and is terminated properly. Anytime the warming burner is turned on, it trips all arc faults on one phase. It looks as though it is tripping on the same phase that this warming burner is pulling its 120 from and if we swap the legs feeding the range, it will then trip all arc faults on the opposing phase. We are using Cutler Hammer CH breakers with diagnostics and are getting the code for a series arc. I have to admit, this one has me scratching my head. I am assuming that the warming burner is creating an imbalance which is changing the sign wave enough to mimic an arc, but I really don't know and have no ideas on a remedy. Any thoughts?