#1 Take a decent pic so people can see
#2 Red caps are rated for 2-5 #12's but I'd never twist 5 together. If they don't fit right, & by the pic they really don't - go buy the larger size. A properly twisted set of wires cut the right length does not require tape. I also strip the insulation off longer, twist, then cut the bare wires shorter
#3 You really should work on twisting things up neatly. The grounds look a mess
#4 Yup, the grounds need to be bonded to the metal box
#5 Not sure on the fill calc for a 4x4 box, I use plastic which are bigger. My only metal boxes are REALLY big, I could probably fit 10 romex cables in them. Plastic boxes are stamped with fill for current carrying conductors
Ground = 2.25 cu ft
Hots = 7 cables = 14 hots * 2.25 cu = 31.5
Total 33.25 cu needed ?
http://ecmweb.com/nec/electric_box_fill_calculations/index.html
GFCI - seperate runs. If you want each outlet to kick off independant then you were told correctly. Almost all of my GFCI protected outlets are independant runs. If you run to the 1st GFCI, you can then connect the next reg outlet off the LOAD side of the GFCI. It will then be protected by the GFCI outlet & if there is a problem BOTH outlets stop working
Are these feeding bathrooms?
If I'm running multiple runs I also leave my wire hanging "looking a mess" until I'm ready to finalize & secure them in place
One reason people get upset is that a poorly wired/twisted connection is a fire hazard. But you are here asking for assistance....
Its best to investigate how to correctky run the wire 1st
Then run the wire :yes:
I bought the NEC 2005 code book a few years ago just to learn more. Some of the best $$ I ever spent