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An electric circuit for a cooker has a length of 25 m. The line conductor has a cross-sectional area of 6 mm*2 (copper) and the c.p.c. conductor has a cross-sectional area of 2.5 mm*2. The external loop impedance Ze is measured as 0.25 ohm and the circuit is protected by a 32A BS 88-2 fuse. The working temperature is 70 C. a) Calculate the total earth fault loop impedance. b) Is this circuit comply with the shock-risk constraints?

An electric circuit for a cooker has a length of 25 m. The line conductor has a cross-sectional area of 6 mm*2 (copper) and the c.p.c. conductor has a cross-sectional area of 2.5 mm*2. The external loop impedance Ze is measured as 0.25 ohm and the circuit is protected by a 32A BS 88-2 fuse. The working temperature is 70 C. a) Calculate the total earth fault loop impedance. b) Is this circuit comply with the shock-risk constraints?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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An electric circuit for a cooker has a length of 25 m. The line conductor has a cross-sectional area of 6 mm*2 (copper) and the c.p.c. conductor has a cross-sectional area of 2.5 mm*2. The external loop impedance Ze is measured as 0.25 ohm and the circuit is protected by a 32A BS 88-2 fuse. The working temperature is 70 C. a) Calculate the total earth fault loop impedance. b) Is this circuit comply with the shock-risk constraints?
Transcribed Image Text:An electric circuit for a cooker has a length of 25 m. The line conductor has a cross-sectional area of 6 mm*2 (copper) and the c.p.c. conductor has a cross-sectional area of 2.5 mm*2. The external loop impedance Ze is measured as 0.25 ohm and the circuit is protected by a 32A BS 88-2 fuse. The working temperature is 70 C. a) Calculate the total earth fault loop impedance. b) Is this circuit comply with the shock-risk constraints?
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