If I get your question correctly. the electrical design applies to any aspect of your day to day lift e.g. lights, heating, washing, cleaning but some specific type of electrical design only applies to manufacture a product like the electrical and electronic design behind your mobile phone.
please let me know if you have further question.
I am not sure I understand your question: a product is an instance of a design, could be in any field. What do you have in mind referring to electric design?
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