external earth fault loop impedance

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Ze=1.87 TT or TN-S?

Morning all, Looking for some opinions MK Sentry Dual RCD 63/30 CU Fluke 1662 readings... 2 lead hi current Ze= 1.87 Ohms PEFC = 6A PSCC = 0.774kA 3 Lead no trip Ze = 12.95 Ohms Zs at cooker/sockets = 12.56 RCD times are compliant No electrode visible and Gas & H2O 10 mm at board...
- Bizron
- Thread
- May 26, 2020
- external earth fault loop impedance pefc pscc terra terra tn-s
- Replies: 12
- Forum: Periodic Inspection Reporting & Certification
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External earth fault loop impedance Ze

Can any one explains what are the three methods to find External earth fault loop impedance Ze please?
- Gktssm
- Thread
- Nov 3, 2013
- earth earth fault loop impedance external external earth fault loop impedance fault impedance information loop loop impedance measurement
- Replies: 8
- Forum: Periodic Inspection Reporting & Certification
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External earth fault loop impedance Ze

Hi all Just checking this procedure is correct for Ze This is a live test so with the consumer unti front off i would lock off main switch keep RCDs on and all MCBs on. Dissconnect the main earth. Now on the megger 1553 i would set it to no trip and use the 3 lead method ? So green...
- voltage
- Thread
- Apr 7, 2011
- earth earth fault loop impedance external external earth fault loop impedance fault impedance loop loop impedance neutral probe
- Replies: 10
- Forum: Industrial Electricians' Talk

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