IPO

Hi

This may be off topic but i am confused with regards share capital, share premium and equity financing.

For a company selling shares the value in excess of par is normally held in share premium account which is deemed non attributable. The share capital although nominal is also deemed non attributable.

However in terms of equity financing and IPO’s , funds are used for expanision, PPE etc-what is the difference between both?
Does the amount of the share premium in this instance go to cash?

Thanks