I think that really to discuss Electricity on shabbos is a sugya bifnei atzmo. so i will be mekatzer.
I can not find anywhere online that has the lashon of the mechaber and i am not good at typing hebrew so I will in turn quote the aruch hashulchan.
Siman shin yud daled the aruch hashulchan says
???? ??? ???? ?
?? ????? ????? (??? ??? ?? ?????): ‘??? ???? ????? ???? ????? ?????’, ??? ????? ??????, ??? ?? ??? ????? ?? ????? ????? ??? ????, ??? ?? ???? ?? ??? ????? ??????? ??????? ????? ????? ?? ???
So it is pashut that it is assur medoiraysa to make a keli. The lashon of the chazon ish in oc 50:9 says
??? ?? ??? ???? ????? ??? ???? ???????
?? ?????? ????? ?? ??? ????? ??????? ????? ???? ??? ???? ????,
????? ??? ??? .
SO the din of ain boneh bkeilim does not apply to make a keli such as a circut.
And about the reb shlomo zalmans sevara, I do not know the answer and I never really looked into it but lehalacha reb shlomo zalman holds like the chazon ish as he says ?? ? ? ? ??? ????? ?????? ???? ??? ?????? ??? ???????
?????? ????? ?? ?????? ?????? ?????? ????
???? ?????? ?? ?????? ???? ???????, ??? ????? ?????
???????? ??? ?????, ?? ????? ???? ?????? ????
?????? ???? ??????? ????? ??? ????????? ???? ??
??? ????? ???
although in other places he seems he may argue.
Reb Chaim Ozers shita is the trickiest . The story is that Reb Chaim ozer stood up and said it is assur but never explained why lest someone will come afterward and push away some of his proofs and then be matir it. In 1935/5695 Reb Shlomo zalman in yerushalayim who was in his 20s realized it was time for someone to explain the sugya b’arichus. He published a sefer called Meorei eish with dealt with the sayalah from every tzad and explained why it is assur. in the haskama form reb chaim ozer he says he agrees completely etc. and yufeh kivein sheassur mishum maaveir umechave. it can be found here. Reb Chaim ozer stood up and said it is assur but never explained why lest someone will come afterward and push away some of his proofs and then be matir it. In 1935/5695 an avreich in yerushalayim who was in his 20s realized it was time for someone to explain the sugya b’arichus. He published a sefer called Meorei eish with dealt with the sayalah from every tzad and explained why it is assur
?? ? ? ?? ? ? ?? ? ? ?? ? ? ? , ?? ? ?
? ? ? ?? ? ? ? ? ? ? , ?? ? ? ?? ? ?? ? ?? ? ? , ?? ?? ? ?? ? ? ?? ? ? ? ?? ? ? ? , ????? ????.
it can be found here
http://hebrewbooks.org/pdfpager.aspx?req=8861&st=&pgnum=6
also whoever said this is a grama I advise them to look in meorei eish perek3 ois 7,8 where he brings the gemara in bk that is mechalek between gerama dnizaken and deshabbos demeleches machsheves asruh torah. ayin shum. if you need more mareh mekomos feel free to ask