A shower circuit is tated 9 KW and 230 Volts is supplied by a flat twin cable. The length of the circuit is 28m and the earth loop impedance external to the installation Ze = 0.18 Q. The installation method is a Reference Method C. Assume that the c.p.c. cable cross-sectional area = 2.5 mm². The circuit is protected by a BS 88-2 fuse and the working temperatue is 70•C. a) Find the design current (Ib), the fuse rating and the tabulated current (It). b) Find the line conductor size. c) Calculate the voltage drop. Is it acceptable and why? d) Check if the circuit is valid for shock-risk. e) Check if the circuit is valid for the let-through energy.

A shower circuit is tated 9 KW and 230 Volts is supplied by a flat twin cable. The length of the circuit is 28m and the earth loop impedance external to the installation Ze = 0.18 Q. The installation method is a Reference Method C. Assume that the c.p.c. cable cross-sectional area = 2.5 mm². The circuit is protected by a BS 88-2 fuse and the working temperatue is 70•C. a) Find the design current (Ib), the fuse rating and the tabulated current (It). b) Find the line conductor size. c) Calculate the voltage drop. Is it acceptable and why? d) Check if the circuit is valid for shock-risk. e) Check if the circuit is valid for the let-through energy.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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