Here's the scenario, I have 30 K.V.A. 600v/208/120 feeding a 60 amp panel, I've got some strange voltages on the load side of the 15 amp breakers, with the breakers energized I'm getting as follows: L-N=117V, L-G=202V , N-G=117. Now with the breakers de=energized I get this: L-N=0V, L-G=117V and G-N=117V. When I test incoming conductors at the panel I have these readings: L1-G=202V, L2=G=202V and L3-G=0V also have these: L1-N=118, L2-N=118V, L3-N=118V and lastly: A-B=205V, A-C=205V, B-C=205V, and N-G=117V. I'm thinking I have a tx issue any input would be greatly appreciated.....P.S. other panel being fed from a 45 K.V.A. TX is fine....Thanks
strange voltages
- Thread starter jamieb
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jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
First guess, bad neutral.
kwired
Electron manager
- Location
- NE Nebraska
No main bonding jumper installed and L3 is grounded someplace.
brian john
Senior Member
- Location
- Leesburg, VA
110% correct.
hurk27
Senior Member
- Location
- Portage, Indiana NEC: 2008
yep common problem when someone treats the panel as a sub panel instead of a separately derived system, they for get that you have to re bond the neutral after a transformer.
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