K
KENRUCK1956
Hi,
I have just fitted a New consumer unit as my accessment job to get registered.
The layout is:
100amp isolation switch
6 amp RCBO for smoke alarms.
80 amp 30 ma RCD
32 amp MCB for cooker
32 amp MCB for downstairs sockets
6 amp MCB upstairs lighting
6 amp MCB spare
80 amp 30 ma RCD
20 amp MCB for Boiler
20 amp MCB for Washing Machine & Dishwasher
32 amp MCB for upstairs sockets
6 amp for downstairs lighting
I have 2 questions:
1. On the downstairs Ring and Radials I am getting:
Continuity okay but Radial R1 + R2 are 0.00 ohms and
Ring Main R1/RN/R2 are 0.00 ohms and R1+R2 reads 0.03 ohms.
I have re-tested 2-3 times but still get the same readings.
2. I have done Zs on all circuits and all readings are around 23.0 ohms.
All these readings are a lot higher than the max readings in table B6 of the On
Site Guide BS 7671:2008 (2011)
Any help would be much appreciated.
For your information my Tester is a MEGGER MFT 1710.
Regards,
Ken Ruck.
I have just fitted a New consumer unit as my accessment job to get registered.
The layout is:
100amp isolation switch
6 amp RCBO for smoke alarms.
80 amp 30 ma RCD
32 amp MCB for cooker
32 amp MCB for downstairs sockets
6 amp MCB upstairs lighting
6 amp MCB spare
80 amp 30 ma RCD
20 amp MCB for Boiler
20 amp MCB for Washing Machine & Dishwasher
32 amp MCB for upstairs sockets
6 amp for downstairs lighting
I have 2 questions:
1. On the downstairs Ring and Radials I am getting:
Continuity okay but Radial R1 + R2 are 0.00 ohms and
Ring Main R1/RN/R2 are 0.00 ohms and R1+R2 reads 0.03 ohms.
I have re-tested 2-3 times but still get the same readings.
2. I have done Zs on all circuits and all readings are around 23.0 ohms.
All these readings are a lot higher than the max readings in table B6 of the On
Site Guide BS 7671:2008 (2011)
Any help would be much appreciated.
For your information my Tester is a MEGGER MFT 1710.
Regards,
Ken Ruck.