35 cooperbussmanncom Available Short Circuit LPJ200SP Fuse300000A Interrupting RatingLPJ20SP Fuse300000A Interrupting Rating Fully Rated Fuse System requirements for both The following addresse ID: 364486
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35 Generally, a circuit breaker should not be applied where the available short-circuit current at its line side terminals exceeds the circuit breakers interrupting rating. This is a requirement per 110.9. However, 240.86 has anbreakers interrupting rating. The term given to this is a series rated combination, series rating, or series combination rating. The application ofcombinations allowed per 240.86 should be used sparingly. The most suitablecircuit, lighting panels. At the end of this section are tables of commerciallypanelboard and switchboard manufacturers. These tables, along with a com- .cooperbussmann.com Available Short Circuit LPJ-200SP Fuse300,000A Interrupting RatingLPJ-20SP Fuse300,000A Interrupting Rating Fully Rated Fuse System requirements for both. The following addresses both the common and specificAseries rated combination allows a load side (protected) circuitinterrupting rating marked on that circuit breaker. Aseries rated combination is a specific combination of circuit breakers orlevels above the interrupting rating of the load side (protected) circuit breaker,but not above the interrupting rating of the line-side (protecting) device. Abreaker series rated combination. There are unique requirements for series 37 110.22 Field Labeling Requirement ©2005 Cooper Bussmann Applying Interrupting Rating: Circuit Breakers Series Rated Systems Series CombinationInterrupting Rating Motor F�.L.A. 100A (1% I.R.) comply with NEC¨240.86(C) UL 489 testing circuit for series CircuitBreaker M Test Set-Up Not Part of Series Rating Testing & Listing Series Rated Combination Total Calculated Load: 1000 Amps Main MCC 1MCC 2 the protected circuitbreaker in a seriesWhat is the minimuminterrupting ratingcircuit breaker? side (protected) circuit breaker, 240.86(C) has a critical limitation on the use ofseries rated combinations. This section requires that a series rated exceeds 1% of the load side (protected) circuit breakers individual . See Figure 5. The reason is that when a fault occurs, about four to six times their full load rating). This added motor contribution issue upon initial installation or in the future. However, series rated installation with a 1000Atotal load, 50% motor load (which is motor load ofcircuit breaker must have at least a 50,000Aindividual or stand-alone Figure 7