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- 19 Jan 2005
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Hi there
I recently invested in an all in one tester and a friend offered to let me try it out on his house. However, the earth fault loop readings for upstairs and downstairs sockets are outside the regs. Ze is OK, but this is what I got:
Downstairs sockets - Zs = 1.39 max, also R1 = 0.52, R2 = 0.80
Upstairs sockets - Zs = 1.3 max, and R1 = 0.45, R2 = 0.59
Now I thought that if 2.5 mm T and E was used, you could estimate R2 as being 1.67 x R1. The values I got were not (would have been 0.93 and 0.75 respectively).
So what do you think the problem is? The installation is only a year or so old. I'm thinking along the lines of:
1 Poor connection(s) in sockets?
2 Poorly laid cables giving higher resistance?
What should be the next step?
SB
I recently invested in an all in one tester and a friend offered to let me try it out on his house. However, the earth fault loop readings for upstairs and downstairs sockets are outside the regs. Ze is OK, but this is what I got:
Downstairs sockets - Zs = 1.39 max, also R1 = 0.52, R2 = 0.80
Upstairs sockets - Zs = 1.3 max, and R1 = 0.45, R2 = 0.59
Now I thought that if 2.5 mm T and E was used, you could estimate R2 as being 1.67 x R1. The values I got were not (would have been 0.93 and 0.75 respectively).
So what do you think the problem is? The installation is only a year or so old. I'm thinking along the lines of:
1 Poor connection(s) in sockets?
2 Poorly laid cables giving higher resistance?
What should be the next step?
SB