QUEBEC CITY - The great divide between HVAC contractors and engineers is probably at its widest point where residential load calculations are concerned. Contractors don't see a practical way to do ...

The NEC contains detailed requirements for calculating service and feeder loads in many types of occupancies. Although most of these requirements are found in Art. 220, other rules affecting service ...

Requirements for branch circuits, feeders, and services each have their own Articles (210, 215, and 230, respectively). The NEC also contains an Article providing requirements for outside branch ...

What do turf wars, battle lines, and tug of war have in common? They are all being mentioned by people involved in the creation of two rival commercial HVAC load calculation standards, one from the ...