Problems caused by these harmonic currents include overheated transformers, switchgear and wiring; random circuit breaker tripping; and reduced useable system capacity.

This article is one of a three-part series of articles that is intended to inform those involved with electrical installations and inspections about fuel cell technology.

A fuel cell is an electrochemical device that combines hydrogen and oxygen to produce electricity, with water and heat as the by-product.

The installation of electric vehicle systems is covered by Article 625 and is the responsibility of code making panel 12 (CMP-12).