If you haven’t seen or heard yet, the 2020 edition of NFPA 70 ®, National Electrical Code ® (NEC ®), is set to hit the shelves this fall. As we at the National Fire Protection Association (NFPA) are ...

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 ...

Each of the Annex D examples illustrates a different application. The first steps are always the same: Describe the problem (based on the one-line diagram) Characterize the loads as either continuous ...

Apparently, contractors who do not perform residential load calculations would prefer to be anonymous. Whether they think they really should be doing load calcs, or whether they simply don't want to ...

Not long ago a residential load calculation — also known as a heat loss calculation or a load calc — was something you had the luxury of skipping. There was a good reason for avoiding it. It was ...