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

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

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.

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