Neon sign transformers differ from most other types of transformers one is likely to encounter.

Excerpted from the revised 4th edition of One- and Two-Family Electrical Systems, this article looks at the 1999 Code changes that affect air conditioning and heat pump equipment.

As metal piping is being replaced by plastic piping, we're losing one of our best means of connecting electrical systems to the earth through low impedance.

In light of the 1999 Code changes, Phil Simmons takes a third look at multiple disconnects grouped in one location.