What are the production processes and steps involved in producing a mains powered device that plugs into a standard mains socket (like a smart plug for example). Mains plug pins are usually made of brass or steel, afaik. And for most countries, there is a plastic sleeve at the end of L&N pins to prevent fingers from reaching live pins as they are inserted / removed. This would require an insert to the injection mold.
Alternatively, since engineering is about lateral as well as brute force thinking, can you just buy brass plug socket parts of the shelf rather than manufacture them to order. How would this impact on the process?
Please elaborate with as much detail as possible!