Posted by pburchett on January 12, 2017 at 12:01:17 from (170.185.157.19):
I have a barn with a preexisting electrical subpanel which is ran from my home breaker box with 3 wires (two hot/1 neutral/no ground 240 volts). I know this is not to code today but it was appropriate when it was built.
I have currently built onto the barn, poured concrete floors, installed garage doors and in the process of covering the outside with metal siding and then upgrading the electrical to a 4 wire feeder. I work slow and only have an hour or so after I get home from my day job till it is dark so it may take a while to get the 4 wire feeder installed.
My question is if the subpanel is wired correctly concerning the ground. Here is how it is wired from the house out to the barn. House is up to code with breaker panel consisting of ground and neutral bar bonded to each other. A double pole 30 amp breaker feeds 2 hot and a neutral wire to the barn subpanel by underground wire not in conduit (no other water lines or phone lines are connected to the barn) Subpanel has the neutral from the house tied to all the neutrals in the barn along with the receptacle grounds. From what I can tell from the NEC this is correct for that time period, BUT should there be a ground rod connected to the barn subpanel?
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