Jerry Simon Posted June 15, 2010 Report Share Posted June 15, 2010 This is a sub-panel. The bottom four wires on the right side are for a 240-volt oven feed (the two wires off the 40-amp, 240-breaker, and the white and green wires on the neutral bus). Do the green ground and the white neutral wires pose a problem being connected to the neutral bus? I know in a sub they're supposed to be isolated, but it was just weird to see, especially since you can see the separate ground wire from the main panel attached to the back of the sub-panelboard's cabinet/enclosure to the right of these branch circuit wires. Thanks for any insight. Click to Enlarge 40.23 KB Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted June 15, 2010 Report Share Posted June 15, 2010 This is a sub-panel. The bottom four wires on the right side are for a 240-volt oven feed (the two wires off the 40-amp, 240-breaker, and the white and green wires on the neutral bus). Do the green ground and the white neutral wires pose a problem being connected to the neutral bus? I know in a sub they're supposed to be isolated, but it was just weird to see, especially since you can see the separate ground wire from the main panel attached to the back of the sub-panelboard's cabinet/enclosure to the right of these branch circuit wires. Thanks for any insight. Yes. The range's grounding wire should land on a grounding terminal bar. Was there one or was there just that feeder grounding lug? - Jim Katen, Oregon Quote Link to comment Share on other sites More sharing options...
Jerry Simon Posted June 15, 2010 Author Report Share Posted June 15, 2010 This is a sub-panel. The bottom four wires on the right side are for a 240-volt oven feed (the two wires off the 40-amp, 240-breaker, and the white and green wires on the neutral bus). Do the green ground and the white neutral wires pose a problem being connected to the neutral bus? I know in a sub they're supposed to be isolated, but it was just weird to see, especially since you can see the separate ground wire from the main panel attached to the back of the sub-panelboard's cabinet/enclosure to the right of these branch circuit wires. Thanks for any insight. Yes. The range's grounding wire should land on a grounding terminal bar. Was there one or was there just that feeder grounding lug? - Jim Katen, Oregon Just the feeder & lug; no ground bus. And if they were savy enough to install the feeder, then why...? That's what threw me for a loop. Quote Link to comment Share on other sites More sharing options...
charlieb Posted June 16, 2010 Report Share Posted June 16, 2010 Ironically I commonly see something similar. Both wires land on the terminal strip.........my boilerplate: This panel does not meet current safety guidelines. It has a four wire feed but it is not configured in a manner that can correctly utilize the four conductors. All of the neutral and ground wires are bonded together. This practice, common to our area is improper. The simple solution is to have a terminal strip installed and bonded to the panel. All of the ground wires can then be moved to the new terminal strip. This will free up additional connection points so that only one neutral wire will be connected under any screw. Any bonding jumper between the panel and the neutral terminal strip should then be removed. Quote Link to comment Share on other sites More sharing options...
Tom Raymond Posted June 16, 2010 Report Share Posted June 16, 2010 Are you sure there isn't another bus? I see a boat load of breakers in there but only a couple of grounded conductors at the top right and just the one equipment ground for the range. Where are the rest of the GCs & EGCs? Tom Quote Link to comment Share on other sites More sharing options...
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