i have seen NO nuetral but house is fine cause of the water pipe connection ...
i do not get the back feed and neutral working ....
i get one leg no good .L1.. and turning on a 240 back feeding the panel so the other side L2 now feeds the L1 ....
Lost/loose or a bad nuetral connections can cause voltage to fluctuate. It may show up as dimming lights that get brighter when an appliance such such as a frig or DW turn on. 240V appliances generally are not affected.
All responses based on the 2011 NEC.
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