I am in the throes of learning enough to do a DIY install of a small heat pump package unit.
The installation manual calls for (and suggests that NEC requires) a "fused disconnect" inline with the power from the panel to the main unit.
I have two points of confusion on this. If my HVAC unit is right next to the main breaker box (like 3 feet away), what's the point of this (to my mind) "extra" disconnect box?
- why does it need a "fuse" (the breaker will be dedicated to the hvac unit)
- why does the HVAC needs its own dedicated disconnect rather than just shutting off the aforementioned breaker in the breaker box (right next to the HVAC unit)?
While we're at it, this is 2015... does ANYTHING in residential wiring still use an actual "fuse"? Why would it be a fuse rather than a breaker?