- Joined
- Jul 20, 2011
- Messages
- 90
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Hi there
I am going to replace a outside light. The circuit is fed from a sfcu spurred from ring socket circuit. Do I need to check the end to ends and figure 8 checks on the ring, or is r1+r2 and insulation tests and other standard tests for spur and light point satisfactory.
Also for another job, TT system, measured ze is 5.44ohms from earth cable at consumer unit, so adding 21ohms for supplier, falls well below 200 so can I put 26.44 ohms on my form as the earth electrode resistance or do I put lim.
also on this job, has an old Wylex four rewireable fuse board external 30ma RCD, 3cables going into one 30A fuse, looks in good condition, wiring looks good, and low usage household, so as long as all my tests stack up, the board can stay?
The few jobs I have looked at so far all have had 10mm earthing and 10mm bonding, Do I have to replace the 10mm earthing with 16mm if I am doing any work on the installation not 100% sure on regs for this.
Many thanks.
I am going to replace a outside light. The circuit is fed from a sfcu spurred from ring socket circuit. Do I need to check the end to ends and figure 8 checks on the ring, or is r1+r2 and insulation tests and other standard tests for spur and light point satisfactory.
Also for another job, TT system, measured ze is 5.44ohms from earth cable at consumer unit, so adding 21ohms for supplier, falls well below 200 so can I put 26.44 ohms on my form as the earth electrode resistance or do I put lim.
also on this job, has an old Wylex four rewireable fuse board external 30ma RCD, 3cables going into one 30A fuse, looks in good condition, wiring looks good, and low usage household, so as long as all my tests stack up, the board can stay?
The few jobs I have looked at so far all have had 10mm earthing and 10mm bonding, Do I have to replace the 10mm earthing with 16mm if I am doing any work on the installation not 100% sure on regs for this.
Many thanks.