Advertisement - Content continues below
Advertisement - Content continues below

Discuss The Weirdest Lighting Circuit yet in the Industrial Electrician Talk area at ElectriciansForums.net

A

andy8758

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:  American Electrical Advice Forum

A cry for help - Customer in old house has a 2 wire lighting circuit. Simple Line/Neutral? Er no. One cable comes from a light in an adjacent room , and one cable goes down to a 2-way light switch. :confused: The second 2-way light switch (at foot of stairs) seems to have a wire that goes "God-knows-where" - both switches have standard 2 strapper wires connecting them. So we appear to have no clear line and neutral. If I connect the wire from the adjacent light to its live/line - I get 55V across the 2 wires. If I connect it to the earth I get 0V. What the hell is going on here? Can anyone explain please?

If I cannot untangle this mess I will simply rewire a new twin and earth from other light, and re-wire switches.
 
uHeat Banner - Forum Discount Available
This official sponsor may provide discounts for members
Advertisement - Content continues below
S

Shakey

  • Thread Starter Thread Starter
  • #2
A cry for help - Customer in old house has a 2 wire lighting circuit. Simple Line/Neutral? Er no. One cable comes from a light in an adjacent room , and one cable goes down to a 2-way light switch. :confused: The second 2-way light switch (at foot of stairs) seems to have a wire that goes "God-knows-where" - both switches have standard 2 strapper wires connecting them. So we appear to have no clear line and neutral. If I connect the wire from the adjacent light to its live/line - I get 55V across the 2 wires. If I connect it to the earth I get 0V. What the hell is going on here? Can anyone explain please?

If I cannot untangle this mess I will simply rewire a new twin and earth from other light, and re-wire switches.
I have seen this in a house i am doing currently

There is a line and neutral at the rose, both two way switches have a single cable coming from one direction, and a twin and cpc going in another direction

Basically there is a JB in the loft, and its all split from there, so its replicating what you would normally get in the rose.
 
G

greekislandlover

  • Thread Starter Thread Starter
  • #3
Seen a similar thing in some flats built in the 1960's. All lights and switches go to one central box somewhere in the hall. Nasty - usually means a rewire.
 
A

andy8758

  • Thread Starter Thread Starter
  • #4
Basically there is a JB in the loft, and its all split from there, so its replicating what you would normally get in the rose.
Thanks for your thoughts - I searched for a JB - but I suspect someone had been "doing-something-themselves" and I had to re-wire one of the other lights where someone had wired the N to the SW/L :eek: I did wonder if this someone had found and removed the JB but it still left me with a missing wire to the other switch.

I got some sort of admission from the lady of the house - her husband was absent. I have promised to ring him this week to discuss this. She also mentioned that a previous electrician had been completely flumoxed with the bathroom light wiring and resorted to re-wiring that. It is a very old cottage (about 300 years old) and the cable routing of the sockets was a bit of an oddity too.

I will give their rather full loft another search for a JB when I return to finish the job later this week.
 
W

wattsup

  • Thread Starter Thread Starter
  • #5
If the guy whom wired it 300 years ago was not part p qualified you really ought to get the council involved. It just goes to show how dangerous dodgy sparks can be, I would have expected it to last 500 years.
 
Electrical2Go - Online Electrical Supplier
This official sponsor may provide discounts for members
Advertisement - Content continues below

Reply to The Weirdest Lighting Circuit yet in the Industrial Electrician Talk area at ElectriciansForums.net

uHeat Banner - Forum Discount Available
This official sponsor may provide discounts for members
Thread starter Similar threads Forum Replies Date
M DIY Electrical Forum 0
H Lighting Forum 4
S Lighting Forum 3
R Electrical Forum 39
S Electrical Forum 25
Advertisement - Content continues below
Top Bottom