1. :If it's a two-pin plug , it doesn't matter which way round they go. 2. Some of these sockets have one or more earth holes to allow 3-pin plugs . 3. The power connectors for AT motherboards are two nearly identical 6-pin plugs and sockets. 4. Europlugs are also different from the similar looking BS 4573 ( UK Shaver ) two-pin plugs . 5. However a 10-A 5-pin plug cannot fit a 32-A 5-pin socket, as the plugs are different diameters. 6. 3-pin plugs from the mainland China. 7. For example, a 32-A 4-pin plug without neutral can plug into a 50-A 5-pin socket with neutral available. 8. Cheater plug adapters are readily available to convert such 3-pin plugs and so allow their use in all types of 2-pin sockets. 9. 24-pin ATX power plug; pins 11, 12, 23 and 24 form a detachable separate four-pin plug , making it backward-compatible with 20-pin ATX receptacles 10. :: : : All very true, but it's worth noting that Americans have somewhat limited access to electrical appliances with three pin plugs !