# Proper thickness of different copper items normally used in Electric switch and socket?

When i open the plastic casing of electric switch and socket normally used in household like (250 V AC 16 A Switch , 250 V AC 13 A Socket) then i found different shaped copper bar. copper rod, copper sheet. Shape of these items are not uniform so area is different. So for a certain voltage and current how can i calculate the proper thickness as well as the copper grade. For a cable diameter is uniform and in web there are lots of information how to calculate the diameter of wire but for these copper items i did not found any good reference where i can study.

Thanks in advance and sorry for this stupid question

• My educated guess is that the shape of the diameter does not really matter, so you should be able to use the diameters given for copper cables and compare them to the cross-sectional area of the connections in the socket. The more important issue may be the materials would be brass more often than copper I think. – 0x6d64 Oct 4 '16 at 19:46
• Remember that there is a cost associated with processing the metal into the required shapes, and it may be that using an over-sized piece of copper is cheaper than cutting it to the minimum size permissible for the current. – Andrew Morton Oct 4 '16 at 19:47
• May I ask a question... why do you need it? If you can explain your target probably we will be able to give you more precise advice. And question actually is not a stupid one. I guess there're a number of patents filed in the area of your interest. – Anonymous Oct 4 '16 at 19:50
• According to your concept i need to consider the lowest thickness/ area to calculate the current rating of brass items, is it ?? @0x6d64 – rumman Oct 4 '16 at 20:15
• I am going to work with these products that's why i need to know in details.@ Anonymous – rumman Oct 4 '16 at 20:18