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    Relationship of MCB size to cable size

    Thank you. It's not necessary. I got BS7671:2008 Requirements for Electrical Installations. But it has red jacket instead green. I'm reading Appendix 4 "Current-carrying capacity and voltage drop for cables and flexible cords" now. "operating current" what does it mean? Device rating (In) or...
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    Relationship of MCB size to cable size

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  3. M

    Relationship of MCB size to cable size

    I want to clarify. I started this topic to find out source of requirement 1.45Iz ≥ I2. To be shure. I look "ON-SITE GUIDE BS 7671:2008. lEE Wiring Regulations 17th Edition". Does Appendix 4 have title "Methods of support for cables, conductors and wiring systems" ? There is nothing...
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    Relationship of MCB size to cable size

    Thank you, PrenticeBoyofDerry. I got BS7671. As I suppose i should read Appendix 6. I didn't find requirement 1.45Iz ≥ I2
  5. M

    Relationship of MCB size to cable size

    Hello. I want to talk about //www.diynot.com/wiki/electrics:fuses_and_miniature_circuit_breakers:mcbtocable If current in circuit is between I1 and I2, MCB may not trip and cable will overheat. Where is mistake? On what document based this article? Sorry for my english :mrgreen:
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