Definition

[Richard K F]

What is the exact defination of "Series Rated"

 

[augie47]

Here is a link to a SquareD document that provides a good definition as well as interesting associated documentation.


http://static.schneider-electric.us...ibution/Switchboards/SB-SF/2700DB9901R407.pdf

 

[al hildenbrand]

The 2008 NEC Handbook includes the (unenforceable) explanatory text that comes as close as the NEC gets to giving a definition.

A series rated system is a combination of circuit breakers or a combination of fuses and circuit breakers that can be applied at available short-circuit levels above the interrupting rating of the load-side circuit breakers but not above that of the main or line-side device. Series rated systems can consist of fuses that protect circuit breakers or of circuit breakers that protect circuit breakers. The arrangement of protective components in a series rated system can be as specified in 240.86(A) for engineered systems applied to existing installations or in 240.86(B) for tested combinations that can be applied in any new or existing installation.

 

[Sierrasparky]

Great topic.
One of those miss-used and miss understood items