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 ...

Incorporating demand factors into service feeder calculations is a key skill any electrical professional (including apprentices) must understand – both for working on the job and passing the ...

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 ...

The New Fifth Edition of Manual N® details the load calculation procedure that addresses the advances in the commercial construction industry: new materials, methods of assembly, and operational ...

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 ...