Does home owners insurance cover renters losses?

No. A renters policy would cover a renters loss, Not the Home owner.

Actually a homeowners form HO-4 is for renters. It provides similar coverage to a "normal" homeowners policy with the exception of not covering the home itself. There are many homeowners forms for different situations. HO-8 OS for condos, HO-10 is primarily for older homes that you don't want to cover for replacement cost so you insure it for the real estate value so you aren't penalized on claims for carrying less than the replacement cost of the home, etc.