Hello all. I have an electrical code question.
I have an existing sub panel in a house about 15 feet from my main and
meter. The existing sub panel is an old fuse type box with main lugs.
I plan to replace the sub panel with a new panel with breakers and
main lugs as well. The existing feed line is in good condition and is
6-6-6 with no ground.
I am replacing the panel with a 125 amp panel and the breaker feeding
this sub panel is 50 amps. (I read somewhere that #6 can support up
to 55 amp or 60 amp protected?)
My question is: Can I run a #6 ground thhn to the box without
replacing the existing feeds and still be code compliant? Or does the
ground need to be armored? I have searched and searched but I cannot
find any info on this.