Sounds like someone ran an MWBC but was too cheap to buy the correct cable.
gordyPA said:
Then from the junction box, 2 wires exit it each having 1 hot line. My question is, is this what is causing the open ground?
What kind of cables are entering and exiting the box? Are they BX (metal sheath), or NM (plastic sheath)? And if the exiting cables have bare or green wires, where are those connected in the jbox?
gordyPA said:
Should I seperate the line going to the junction box with another line?
Yes. Run another cable from the panel, using black=hot, white=neut, bare/green=ground (as it should be), and change the existing cable to that same layout. Wherever the white wire from the existing cable connects in the panel should be where you connect the black wire from the new cable, and then both whites should land on the neutral bus bar, as should the grounds
if it is the main panel (if it's a sub panel, the neutrals and grounds should be separated).
Make sure the new and existing wire is sized appropriately for the breaker (#14 for a 15A breaker and #12 for 20A -- when in doubt use #12 wire).
J.V. said:
I must assume this circuit is in conduit. A green conductor is my indicator.
I was picturing MC.. Fortunately either way the ground is insulated and probably sized the same as the conductors, so the OP is not in immediate danger of fire.