The rules for feeder and service load calculations differ from those for branch-circuit calculations. Do you know the differences? With branch circuits (Art. 220, Part II), you’re basically ...

When designing power distribution for a facility, you must assume a lighting load no less than that in Table 220.12 [220.12] if the table specifies your occupancy. Should you use this table for work ...

Manual J 8th Edition is the national ANSI-recognized standard for producing HVAC equipment sizing loads for single-family detached homes, small multi-unit structures, condominiums, town houses, and ...

The electrical panel, also known as the service panel, is the control center for all the electrical circuitry in a residence. Today's panels are bigger than earlier versions. They have to be, because ...

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 ...