bnicholson
Junior Member
- Joined
- Oct 15, 2008
- Messages
- 15
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Hi All, I am still workimg on tracking down a dodgy light fitting / cable in a house which has 10 plus rooms upstairs - 20 plus light fittings.
After a tough day in an attic trying to resolve the problem, I still have some questions that I do not know the answers:-
1. Apparently if I just Megger the cct I will find the short - I know how to carry out the IR test but I cannot understand how to use the findings to find the location of the short?
2. If you use a 100W bulb as a series limiter, it will help in the fault finding process - I seemed to have a problem in the Loop feed - why would the 100Watt bulb not blow as well?
3. If you disconnect the lighting cct half way round, this will help to isolate the fault. I struggled today to find the feed cable from the CU - it came up through a partition wall, nowhere near where expected!
4. If it had been downstairs lighting - how do you find out which light/rose/fitting is first in the radial?
I hope your feedback will also help others when trying to fault find in extremely large houses, or maybe it's just me struggling!
Regards
Bob N.
After a tough day in an attic trying to resolve the problem, I still have some questions that I do not know the answers:-
1. Apparently if I just Megger the cct I will find the short - I know how to carry out the IR test but I cannot understand how to use the findings to find the location of the short?
2. If you use a 100W bulb as a series limiter, it will help in the fault finding process - I seemed to have a problem in the Loop feed - why would the 100Watt bulb not blow as well?
3. If you disconnect the lighting cct half way round, this will help to isolate the fault. I struggled today to find the feed cable from the CU - it came up through a partition wall, nowhere near where expected!
4. If it had been downstairs lighting - how do you find out which light/rose/fitting is first in the radial?
I hope your feedback will also help others when trying to fault find in extremely large houses, or maybe it's just me struggling!
Regards
Bob N.