transfer switch on multiwire circuits

If I have both circuits of a multiwire circuit going to a 120v transfer switch, then I have the potential to exceed the rating on the neutral. But if both circuits are just a few amps of lighting, then it really shouldn't be a problem.
Right? Or am I overlooking something?
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panel. If so then the currents will cancel. Equal amps on each will produce 0 amps on the neutral. 10 Amps on one side and 8 Amps on the other will net a 2 Amp load on the neutral etc. If both circuits originate on the same pole then the currents will add and you will overload the neutral. Kevin
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