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2396 style question, 2400, short circuit, RCBO,
II) Short circuit protection (8 Marks) Zn = (R2 + RN) Zn = (9.22 x 17/1000) = 0.15 Ipf = V x Cmin/Zn Ipf = 230 x 1.1 / 0.15 = 1.686 Total Ipf = 1.686 + 2.1 = 3.786kA Using the equations t=k²s²/I² 115² x 4² / 3786² = 0.014s For a 32A 30mA type B RCBO 3786A will take 0.02s to disconnect...- Daniel Jones
- Post #6
- Forum: Electrical Wiring, Theories and Regulations
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2396 style question, 2400, short circuit, RCBO,
wow amazed how quick that was answered thought i would leave it a day or 2 and i had replies within hours one last thing. what do you think to these answers An electrical installation within a small retail outlet, located in a farm building is to be designed with the protective measure of...- Daniel Jones
- Post #4
- Forum: Electrical Wiring, Theories and Regulations
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2396 style question, 2400, short circuit, RCBO,
hello, studying for my 2396 exam and i need some help! Been banging my head against a wall for hours trying to get this one straight in my mind. The question is as follows: An electrical installation within a small retail outlet, located in a farm building is to be designed with the...- Daniel Jones
- Thread
- Replies: 46
- Forum: Electrical Wiring, Theories and Regulations
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