New control panel requirements

Panel designers and builders, machine builders, end-users, system integrators, equipment movers and installers, as well as inspectors are among those working with control panels differently as of April 25, 2006. That is when UL 508A Supplement SB took effect. Supplement SB from Underwriters Laboratories (UL) provides three methods that can be used to determine the short-c...

06/01/2006


Panel designers and builders, machine builders, end-users, system integrators, equipment movers and installers, as well as inspectors are among those working with control panels differently as of April 25, 2006. That is when UL 508A Supplement SB took effect.

Supplement SB from Underwriters Laboratories (UL) provides three methods that can be used to determine the short-circuit current rating (SCCR) of an industrial control panel as required by the 2005 NEC Article 409. Among changes is the need to determine and SCCRs for the panel. Experts involved say those and other changes are likely to lead to safer overall designs.

A Control Engineering Webcast sponsored by Square D/Schneider Electric and UL University walks listeners through the code changes and the new UL Standards and examines methods for fast adherence to Code requirements.

www.controleng.com/webcasts and www.ul.com/ul508pag .





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