I just finished reading Carol Fey's article, “Volts, Amps & Watts,” in the December 2005 edition of Plumbing & Mechanical. Once again she has captured the simplicity of electricity.
Volts times amps equals watts. The VA rating on the transformers is the watts rating. This particular article has helped me put the “puzzle” together on how electricity is utilized in the heating and air-conditioning industry.