1. I have a 12 volt doorbell tranformer and a 24 volt humidifier transformer. Both step down 120 volt line power. Both output AC. Both have terminal to terminal voltage on their secondaries (12v and 24v respectively), however the 12v transformer also has 12v line to ground voltage off one of its secondary wires. The 24v transformer has none. Why is this?
2. In foreign countries using 240v only, how is power delivered into the house off the utility transformer? One hot 230v and 1 neutral wire?
Thanks
2. In foreign countries using 240v only, how is power delivered into the house off the utility transformer? One hot 230v and 1 neutral wire?
Thanks