Can't supply a 480 volt (line to line) load under (B)(1), has to be line to neutral loads. I suppose you could supply a load that is 480 volts line to neutral - but a system with that voltage is not common, and would be about 830 volts phase to phase if a wye system - getting into over 600 volts gear being involved if you would have such a system.
Yes. Can be deceiving with some of them as their two and three pole units do have a tie bar across three handles - but a big difference between them and two or three single pole units with handle tie is that they also have an internal common trip feature - one pole trips they all do, and and you can't take them apart and have two or three single pole breakers - it is one unit with three handles and a tie between those handles.
It is addressed in (B)(2) and (B)(3).
Yes, though not strictly limited to it - mostly only applies to your typical 120/240 volt "miniature" circuit breakers - like we see in "loadcenters". Only other thing that it commonly applies to is 277 volt lighting and some electric heating units. Other 277 volt items do exist but are considered to be sort of rare.Ok I understand ya on that one too, Thanks!
Example: So if you have a 3 phase 480 motor, you can not use individual circuit breakers with handle ties, you must use a factory 3 pole breaker correct (internal common trip)?
It seems as though 240.15 is mostly dealing with individual breakers with handle ties.... that's a question LOL
Hopefully that's the last question
