Hi,
I recently rewired a lighting circuit, very simple set up of 5 pendants, 2 batten holders and 1 class I metal chandelier type fitting.
Install is TT with Ze 62 ohms. IR all spot on and R2 approx 0.52ohms.
I discovered that the CPC had 120V when it was not connected to earth. I know about inductance but the 120V seems a lil on the high side. The only apparent source of this increase IMO is from 2 of the switch drops which run for approx. 1.2m (each) through old steel conduit to the switches. There are no old cables in these drops, and the 1.2m conduits are not connected to anything else.
Also, my MFT1552 occasionally comes up with the fuse blown indicator whenever I try to check continuity or take an r2 reading. I have to take the fuse out and re-insert it for it to work again. Bl00dy annoying it is.
Does anyone have similar experience with these Meggers? Or even answers maybe..! I have not yet contacted Megger as I guess their stock answer will be it requires looking at and will cost a megger amount of dough!
Merry Xmas
I recently rewired a lighting circuit, very simple set up of 5 pendants, 2 batten holders and 1 class I metal chandelier type fitting.
Install is TT with Ze 62 ohms. IR all spot on and R2 approx 0.52ohms.
I discovered that the CPC had 120V when it was not connected to earth. I know about inductance but the 120V seems a lil on the high side. The only apparent source of this increase IMO is from 2 of the switch drops which run for approx. 1.2m (each) through old steel conduit to the switches. There are no old cables in these drops, and the 1.2m conduits are not connected to anything else.
Also, my MFT1552 occasionally comes up with the fuse blown indicator whenever I try to check continuity or take an r2 reading. I have to take the fuse out and re-insert it for it to work again. Bl00dy annoying it is.
Does anyone have similar experience with these Meggers? Or even answers maybe..! I have not yet contacted Megger as I guess their stock answer will be it requires looking at and will cost a megger amount of dough!
Merry Xmas