Old house, no Neutral coming from APS pole. Neutral vs Ground
What comes down from the pole is actually 2 hots and a neutral. The power company does not deliver ground; you are expected to supply that yourself from your own ground rods.  

We don't want neutral flying up to wild voltages (say: due to a transformer leak or something), so we clamp neutral's voltage to near ground voltage.  We do that with a neutral-ground equipotential bond in the main service panel, and ONLY there.  Everywhere else, neutral needs to be separate from ground or else bad things will happen.  

So, your main panels intakes: Hot1, hot2 and neutral from the power company, plus ground from your Grounding Electrode System.   You bond the last two.  Then to your appliances you output hot, neutral, and safety ground.