Hey so just been to see a dad from the little daughters school class who asked me to have a look at his upstairs landing light pendant as his mrs said it's flickering the lamp when on a few mins and then goes right out altogether ! She then needs to switch off and on to get it on again, sounded strange so had a few mins to take a look.
New build estate, and just at top of stairs single pendant with a GU10 lamp holder and a CFL GLS lamp in place. Tested with T5-1000 Fluke at rose and had L-N 25V ac, then 23V L-E and nothing at all N-E, switched any one of the 2 way and inter switches and got 241V tightened all rose terminals and checked secure & not clamped onto insulation and then checked at inter sw and top of stairs 2 way switch, had 1 x 3 core as expected plus conn block with 3 x lines and 3 x Neutrals in and tested at 241V between and 242V to metal backbox / cpc's all ok then test one strapper to cpc and / or N and got 19V which then rose to 25V ac like a second hand ticking up ? but all switching operating lamp fine and 240V across to other strapper and back and forth always leaving 22-25V ac on the strapper not in use to cpc or N and same after at ceiling rose ! 19V slowly rising up to 23V which then brought on red light on meter then 25V stopped again ! Also picked up 41V or so between Com and L1 strapper think it was while lamp was off.
Wondering if barely connected N in connection somewhere or other loose wire causing capacitance or inducing a voltage etc.. or wondering what third line and N are for tapping off the connector block and whether they are supplying something else which is causing the kind of ghost voltage and then if this residual voltage is the cause of the cfl lamp problem ?
Have said if he wants it sorted will need to go back and start going through things more while isolated etc.. and make sure no borrowed neutral or anything loose.
Any more experienced thoughts welcome, Thanks.
New build estate, and just at top of stairs single pendant with a GU10 lamp holder and a CFL GLS lamp in place. Tested with T5-1000 Fluke at rose and had L-N 25V ac, then 23V L-E and nothing at all N-E, switched any one of the 2 way and inter switches and got 241V tightened all rose terminals and checked secure & not clamped onto insulation and then checked at inter sw and top of stairs 2 way switch, had 1 x 3 core as expected plus conn block with 3 x lines and 3 x Neutrals in and tested at 241V between and 242V to metal backbox / cpc's all ok then test one strapper to cpc and / or N and got 19V which then rose to 25V ac like a second hand ticking up ? but all switching operating lamp fine and 240V across to other strapper and back and forth always leaving 22-25V ac on the strapper not in use to cpc or N and same after at ceiling rose ! 19V slowly rising up to 23V which then brought on red light on meter then 25V stopped again ! Also picked up 41V or so between Com and L1 strapper think it was while lamp was off.
Wondering if barely connected N in connection somewhere or other loose wire causing capacitance or inducing a voltage etc.. or wondering what third line and N are for tapping off the connector block and whether they are supplying something else which is causing the kind of ghost voltage and then if this residual voltage is the cause of the cfl lamp problem ?
Have said if he wants it sorted will need to go back and start going through things more while isolated etc.. and make sure no borrowed neutral or anything loose.
Any more experienced thoughts welcome, Thanks.
