There is also a mnemonic for older three phase current cables (black, brown, black) the first phase is the black one between sky(blue) and ground. @mjausson@exador23
@mjausson@exador23 Actually electric ground is always earth, it's just a question of when the connection is made. Our pool was installed before grounded circuits were required, so at some point they added a ground by hammering a grounding rod into the dirt and connecting to that.
@mjausson @exador23 At least here in Éire we often refer to "Electrical Ground" as "Earth" in English, too