KSTR
Major Contributor
Hi,
Recently, contradicting opinions popped up whether the mains-powered gear we typically use in our HiFi/HT setups is mostly 2-prong (safety class-II, fully isolated) or 3-prong (safety class-I, earth-grounded).
To create a data snapshot, I'd like to ask users how the majority of their gear in current use is connected to the mains grid.
Some considerations:
You can of course look up the safety class in the product manuals, or look on device's rating plate/sticker. When you see dual enclosing squares, it's 2-prong (class-II).
You may of course post details / numbers if you like, increasing the detail of the survey.
Recently, contradicting opinions popped up whether the mains-powered gear we typically use in our HiFi/HT setups is mostly 2-prong (safety class-II, fully isolated) or 3-prong (safety class-I, earth-grounded).
To create a data snapshot, I'd like to ask users how the majority of their gear in current use is connected to the mains grid.
Some considerations:
- if a device has a fixed mains cable, just look at its plug.
- if a device has a detachable mains cable, look at the mains power inlet socket and count the pins. This because you can insert 3-prong mains cables into IEC Type C17 sockets which have only 2-pins but otherwise look the same like the normal C13 socket.
- if a device is powered from an external mains supply like the typical wall-wart / brick, look at supply's power input as per above. Quite often this will be 2-prong supplies but there are exception (for example, some Notebook supplies).
- if a device is USB-powered but USB is not used for data transfer (so, power only) it shall be assumed it is powered by your typical isolated USB charger, therefore 2-prong.
You can of course look up the safety class in the product manuals, or look on device's rating plate/sticker. When you see dual enclosing squares, it's 2-prong (class-II).
You may of course post details / numbers if you like, increasing the detail of the survey.