Transcription of Fuse Sizing Guide - OMEGA Engineering
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Fuse Sizing Guide - OMEGA Engineering
Z-1061 Main Service Conductor Cable Limiters ( 240, 450-6): a) Select by cable size and mounting terminal configurations Main Service Circuit Fuses Mixed Loads: a) Size fuses same as item Transformer Circuit Fuses ( 450-3b, 240-3, 240-21, 384-16d, 430-72b Ex. 3, 4 & (c) as required):* a) PRIMARY FUSES: Size fuses not over 125%. As exceptions exist, refer to the appropriate paragraphs. Recommended fuses: LESRK, ECSR, JDL, LCL+.* b) SECONDARY FUSES (Sum of following): 125% of the continuous load plus 100% of non-continuous load. fuse size not to exceed 125% of transformer secondary rated amps. RECOMMENDED FUSES: LENRK, ECNR, NCLR, JDL or LCU.
Z-108 Interrupting Rating (I.R.) N.E.C. 110-9 requires that the interrupting rating of fuses and breakers not be less than the maximum available short circuit
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