Posted by andy r on December 08, 2017 at 16:41:49 from (166.181.83.27):
I am switching from a lp gas fired stock tank heater to an electric heater. Today I pushed the 10 - 2 w/g underground feeder wire through a 3" plastic tile line I had put in a couple weeks ago (goes to the edge of the barn from the new 100 amp box). This new 100 amp box was installed this summer at the central distribution pole. Only one breaker is presently installed feeding the grain bins. I am hooking into this 100 amp central box. Coming down the pole are 4 wires - 2 hot wires (no identifying tape), one wire taped with white electrical tape (neutral), and one wire taped with green electrical tape (ground). The two hot wires go to the bus bars the fuses snap into. The white taped wire goes to the neutral bar. The green taped wire is in a connector which is screwed tight to the electrical box along with the green taped wire that goes to the grain bin. The white taped wire from the grain bin is attached to the neutral bar with the other white. Of course the black wires from the grain bin attach to the 2 pole fuse. So, it seems that the ground wires (green taped) and the neutral wires (white taped) are not ever connected in this box to a common bar. Also the screw typically provided to bond the neutral bar to the box isn't in place. The neutrals and the grounds are not connected as in many boxes I have worked with. There is no earth ground rod either. Maybe this box would be considered a sub-panel where the neutrals and grounds do not connect.
A lifelong excellent electrician installed the new box the summer. Anyway, how do I connect this new 10 - 2 w/g????? I know the black goes on the new fuse. The white goes on the neutral bar. But, should I just attach the ground to the box and stay away from the neutral bar???????? Maybe the new feeder wire ground should be slid in the connector where the two other big grounds are connected. Thanks.
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