In article , Farmer Giles writes
There is no single coil, there are 2 wound bifilar (together) and connected (through the load) in antiphase. All the current in the live 'coil' returns in the in the neutral 'coil', any flux generated by the live coil is negated by the flux generated in the opposite direction by the neutral coil. There is no resulting inductance in this situation.
You need to look beyond simple self inductance to see the answer