by GerryAZ (Posted Sun, 02 Jul 2017 23:41:59 GMT+7)
I recommend a single resistor from neutral to ground because the generator returns to floating neutral operation if the resistor connection(s) come loose. With resistors connected to both hot lines (X and Y on your L14-30 receptacle), failure of one resistor will result in shifting the voltage so that neutral could be as much as 120 volts with respect to ground. Since most generators have duplex receptacles in addition to the twist lock, an easy way to create the neutral to ground reference is to connect a resistor between neutral and ground terminals in a replacement 15-ampere plug (no cord needed). Then you simply insert the grounding plug into one of the duplex receptacles when you need it.
I recommend a single resistor from neutral to ground because the generator returns to floating neutral operation if the resistor connection(s) come loose. With resistors connected to both hot lines (X and Y on your L14-30 receptacle), failure of one resistor will result in shifting the voltage so that neutral could be as much as 120 volts with respect to ground. Since most generators have duplex receptacles in addition to the twist lock, an easy way to create the neutral to ground reference is to connect a resistor between neutral and ground terminals in a replacement 15-ampere plug (no cord needed). Then you simply insert the grounding plug into one of the duplex receptacles when you need it.