This is part 1 in an ongoing series on HVAC load calculations. The folks at SNIPS have asked me to do a basic how-to article about HVAC Manual J load calculation as that is allegedly a big part of my ...

Note: This article is based on the 2002 NEC. Even if you work with stamped drawings, you'll eventually need to do commercial load calculations in the field or on a licensing exam. The National ...

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 ...

Right-N® is the computerized version of the just released Air Conditioning Contractors of America (ACCA) Manual N, 5th Edition, light commercial load calculation method. Right-N can be used to rapidly ...

Once you've done your load calculations, the next step is to size your overcurrent protection device (OCPD). Annex D3(a) provides a good example of how to do this. Recall that the first step in load ...