9. Table 52.3 – Minimum cross-sectional area of conductors Cross-sectional area mm 2 Material 0.75 Extra-low voltage circuits for special appliances 0.75 a For other appliances As specified in the product standard Copper For specific appliance Flexible connections with non sheathed and sheathed cables 4 Copper Signalling and control circuits 1.0 16 Copper Aluminium Power circuits Bare conductors 0.5 (see note 1 in BS 7671) Copper Signalling and control circuits 1.0 16 Copper Aluminium Power and lighting circuits Non sheathed and sheathed cables Conductor Use of the circuit Type of wiring system I have doubts about this
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Hinweis der Redaktion
Refer to Appendix 4. Use of Appendix 4 will covered in more detail in Section 523/525. For now it is worth getting students used to finding installation methods and their related reference method.
Refer to Appendix 4. Use of Appendix 4 will covered in more detail in Section 523/525. For now it is worth getting students used to finding installation methods and their related reference method.
Refer to Appendix 4. Use of Appendix 4 will covered in more detail in Section 523/525. For now it is worth getting students used to finding installation methods and their related reference method.
The following slides illustrate busbar and powertrack systems. Bs 7671 does not contain any specific detailed requirements (apart from using the correct British Standards). However Appendix 8 should be quickly referred to. Generally manufacturers information/recommendation should be followed.
Such systems (often overhead) are also used to supply machinery, providing flexibility when the connected equipment may require frequent movement.
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