A Class A FSR (Field Safety Representative)certificate of qualification entitles the holder to submit declarations on behalf of their employer for any type of regulated electrical work. There are no voltage or ampere limitations.A Class B FSR certificate of qualification entitles the holder to submit declarations on behalf of their employer for regulated electrical work only with respect to electrical installations where the voltage of the completed installation is under 750 volts. The certification also covers the Underground Raceway scope, allowing underground conduit installations at any voltage.