We'd like to remind Forumites to please avoid political debate on the Forum... Read More »
We're aware that some users are experiencing technical issues which the team are working to resolve. See the Community Noticeboard for more info. Thank you for your patience.
📨 Have you signed up to the Forum's new Email Digest yet? Get a selection of trending threads sent straight to your inbox daily, weekly or monthly!
Help changing light switch
Options

SEMO-Mark
Posts: 7 Forumite
Hi all,
I could do with changing my light switch, and need help matching up the wires.
The current wiring behind the switch has two mains wires coming out of it.
Mains cable 1 has:
1 red wire connected to Com
1 black wire connects straight into cable 2
1 earth wire
Mains Cable 2 has:
1 red wire connected to L1
1 black wire connects straight into cable 1
The new switch needs a neutral wire
Now I am assuming the black wire is a neutral wire which i need so if i cut this so i can attach it to the switch is this correct?
I have attached photos if someone could guide me that would be great.
I cant post a link as a "new user" so here is the url to photos imgur.com/a/OaHVSLJ
Thanks
I could do with changing my light switch, and need help matching up the wires.
The current wiring behind the switch has two mains wires coming out of it.
Mains cable 1 has:
1 red wire connected to Com
1 black wire connects straight into cable 2
1 earth wire
Mains Cable 2 has:
1 red wire connected to L1
1 black wire connects straight into cable 1
The new switch needs a neutral wire
Now I am assuming the black wire is a neutral wire which i need so if i cut this so i can attach it to the switch is this correct?
I have attached photos if someone could guide me that would be great.
I cant post a link as a "new user" so here is the url to photos imgur.com/a/OaHVSLJ
Thanks
Mark
0
Comments
-
The wires that go into the old switch go into the new switch. Leave the black wire alone.Tall, dark & handsome. Well two out of three ain't bad.0
-
Hi,
The new switch needs a neutral wire though which is why I thought using the black wire?Mark0 -
Get an electrician.0
-
The new switch needs a neutral wire though which is why I thought using the black wire?
Why do you think it need a neutral?
I'm tempted to refer you to Riestard for advice at this point.Proud member of the wokerati, though I don't eat tofu.Home is where my books are.Solar PV 5.2kWp system, SE facing, >1% shading, installed March 2019.Mortgage free July 20230 -
Could you post a photo of the front of the switch and/or a link to where you bought it from? From the Chinese writing on the back I don't think it's going to be compliant with British Standards.
To supply L and N to the switch you'll need to find which one of the two reds is L, and you'll need an electrical tester to find that.
The red L and both black N would go in L & N, and the other red would go in one of the switch terminals (L1 L2 L3 L4)A kind word lasts a minute, a skelped erse is sair for a day.0 -
There!!!8217;s a very good chance you don!!!8217;t have a neutral at the switch and if the switch really needs a neutral it isn!!!8217;t going to be any use.
From what you!!!8217;ve posted you seem to be lacking in the knowledge required to safely change this switch so I would also advise you consult an electrician.
Edit: from the photo it’s possible you have a neutral, with the reds acting as live and switch live but impossible to say for sure. Still get an electrician for this one and as per the poster above, what is the switch and where did you get it? What does it do that requires a neutral?0 -
Red from com1 goes to L
Red from L1 goes to L1
It would appear the earth wires are not currently connected to earth. They should be connected to the box."A nation's greatness is measured by how it treats its weakest members." ~ Mahatma Gandhi
Ride hard or stay home :iloveyou:0 -
That switch is NOT COMPLIANT with British Standards I would advise you bin that and get a proper switch from a proper retailer (they are only a couple of quid so why bother with Chinese tat)
Also get an electrician, as you clearly don't know what you are doing!
No self respecting electrician would use that (I wouldn't*)
*I am not a qualified electrician, but I do have a basic understanding I also know when I am out of my depth with Electrics and I don't attempt to do anything than very basic stuff that I am comfortable with,0 -
Here is your photo link made live. I have to say I am more confused than ever. What is that complicated beat wrapped up in plastic? Maybe you could tell us the model name/number of the new light.0
-
Did the switch not come with any instructions? Often there is a jumper needed between the Permanent live feed and the other parts of the switch if a 230v light is to be powered.The comments I post are my personal opinion. While I try to check everything is correct before posting, I can and do make mistakes, so always try to check official information sources before relying on my posts.0
This discussion has been closed.
Confirm your email address to Create Threads and Reply

Categories
- All Categories
- 350.9K Banking & Borrowing
- 253.1K Reduce Debt & Boost Income
- 453.6K Spending & Discounts
- 244K Work, Benefits & Business
- 598.8K Mortgages, Homes & Bills
- 176.9K Life & Family
- 257.2K Travel & Transport
- 1.5M Hobbies & Leisure
- 16.1K Discuss & Feedback
- 37.6K Read-Only Boards