Can audio isolation transformer be used for AC power isolation?
Some audio isolation transformers are designed to carry signals between parts of a system that use dangerous voltages and parts that are not designed to handle such voltages safely.  Many others are not, since transformers that don't need to provide a guaranteed-safe isolation barrier can be made more cheaply than those that do.  Unless the transformer's documentation specifies a 1000V or more breakdown voltage and also specifies what safety standards it satisfies, I would not expect it to be suitable for any such purpose unless it is constructed in a way clearly intended for that purpose.