Check my wiring...

 Ok...I have a 3 phase supply, (220v/phase) transformer on pole, neutral
bonded to earth, then to meter box and breaker, then 4 wires to ECB, and
then on to all the various feeds.

I have a generator, the output is NOT bonded to the frame, or anything. I
want to tie one leg to the neutral, before the ECB, and the other, via a
changeover relay, to phase 3. (before ECB)

Is there any electrical, or safety, reason why I shouldn't do this?

 

The genset might not like 220 to ground so I would use a 500V megohmmeter to
check to make sure the winding to stator insulation can handle the higher
voltage.  I can only imagine what kind of damage an arc from winding to
ground would cause with it operating.  Other than that I don't know.  BTW
both your first post of this question and your test post showed up fine for
me.

  Seems ok.

 Should ground the generator....

 Bet there's a marked hook up lug on the generator.

  Another thought...

 I don't know if you plan on using a computer on that generator,
 but from what I've read, the cheaper generator don't produce power
clean enough for delicate electronics.

 Today's IC chips are vulnerable to spikes in voltages.

 In article


Actually, that is mostly an "Old Wives Tale" these days.  Most
(99%) Computers built today use Switching Power Supplies, which
can take about ANY  kind of power, including, but not limited to
50-70Hz AC, and from 85 to 250 Volts AC or DC.  Yes, the Chips
are very susceptible to Spikes, and voltage surges, but a Switching
Power Supplies design, is such that the FIRST element is a Bridge
Rectifier and then a Set of Filtering Capacitors, feeding a PWM
Switcher and High Frequency Transformer, with a Feedback Loop
to provide Regulation of the output voltages.  This precludes any
spikes or voltage surges getting thru the Power supply to the IC's....