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 Post subject: exposed wiring help
PostPosted: Sat Jul 21, 2018 7:40 pm 
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hi all,

today i replaced an outdoor security light. my old one was 10 years old and weathered, stopped working eventually.

install went ok. except when i went to secure the rear wire covers, it came up short.

i had to stop in the end and hope it doesn't rain. my question is what can i used to cover the wires? or what should i do with this install?

i've wrapped it in PTFE at the moment.

many thanks

finest1

PS : does anyone know how to rotate a quarter?


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 Post subject: Re: exposed wiring help
PostPosted: Sun Jul 22, 2018 12:53 am 
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Change the flex, or move the light. (It looks like the wrong flex any way)

PTFE tape is what plumbers use.

If you want to rotate it 90 degrees you will have to undo one of the fixings

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 Post subject: Re: exposed wiring help
PostPosted: Sun Jul 22, 2018 8:10 am 
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Replace the flex for a longer piece?


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 Post subject: Re: exposed wiring help
PostPosted: Sun Jul 22, 2018 12:14 pm 
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thanks guys, I was referring to the photo being rotated one quarter turn!

the mounting is fine. all I need is to cover the exposed wiring, but with what?


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 Post subject: Re: exposed wiring help
PostPosted: Sun Jul 22, 2018 12:22 pm 
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finest1 wrote:
thanks guys, I was referring to the photo being rotated one quarter turn!

Oh, you didn't say that. Here you go.

Attachment:
l2.jpeg
l2.jpeg [ 88.08 KiB | Viewed 511 times ]


Any photo editing programme can do that



finest1 wrote:
the mounting is fine. all I need is to cover the exposed wiring, but with what?


You don't. You change the cable for a longer one. (Which is what you were told the first time you asked)

Suppose you were to "cover it with something" To do the job properly it would have to be sheathed / covered / protected by something with no seam, in order to stop water getting in (i.e. flexible conduit) to do that would mean disconnecting the cable, if you are going to do that, you may as well just change the whole cable and not worry about flexible conduit. :-)

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 Post subject: Re: exposed wiring help
PostPosted: Sun Jul 22, 2018 3:50 pm 
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thanks for the replies.

the issue I have is the current flex wire is too thick for the terminal cover. otherwise it would have been fine.

ive uploaded a photo of my electric circuit ring. you may or may not see its 4 core ( blue, green & yellow, black, brown) the terminal on the light unit are L, N and E

can I change the 4 core to a 3 core?

can I also get a slimmer wire to help with the terminal cover?

or must I stay with the original flex thickness?


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 Post subject: Re: exposed wiring help
PostPosted: Sun Jul 22, 2018 4:05 pm 
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You can use a smaller diameter flex to feed your light fitting. (Sure I have said change the flex before :dunno: )

You should also change the choc blocs they are on their way out (corrosion) did the conduit box have a rubber gasket? (It should)

(I won't mention the fact it should be black conduit for outside use)

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 Post subject: Re: exposed wiring help
PostPosted: Sun Jul 22, 2018 4:08 pm 
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thanks for quick response

yes conduit box had a rubber gasket.

so I can change to a 3 core? do I need to? or stay with 4 core?

what's the exact name of the "chock blocks?"


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 Post subject: Re: exposed wiring help
PostPosted: Sun Jul 22, 2018 4:15 pm 
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Your lamp should only need a 3 core, no idea what the 4 core is for.

choc bloc because it looks like
Attachment:
choc bloc.png
choc bloc.png [ 216.35 KiB | Viewed 487 times ]


Others in the future will read this, and this will answer the............I wonder why question

It's officially called connector strip, you want some at least 5A rating (You can use bigger, but never smaller)

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 Post subject: Re: exposed wiring help
PostPosted: Sun Jul 22, 2018 5:37 pm 
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great, thanks for all your help! i'll get on to it straight away!

:cheers:


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 Post subject: Re: exposed wiring help
PostPosted: Sat Jul 28, 2018 12:40 pm 
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update:

I ordered what I thought was 6mm cable which would give me enough space for the cable to enter the lighting unit and provide a snug fit. The cable came today and it measured twice that! so im confused as to how to order the right size cable. a quick search on the internet made it even more baffling. so the photos I've attached is 6mm cable I ordered, but it shows with a caliper its not 6mm.

can someone explain how I can work out what cable size I need?

thanks


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 Post subject: Re: exposed wiring help
PostPosted: Sat Jul 28, 2018 12:43 pm 
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The 6mm is six square mm. The size of the conductor cross section.
Nothing to do with the outer sheath size.

What size is the fuse protecting the circuit?
If it's a 6 amp fuse, 1mm will be plenty big enough.



For this message the author Dave54 has received gratitude : OnlyMe
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 Post subject: Re: exposed wiring help
PostPosted: Sat Jul 28, 2018 2:17 pm 
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Dave54 wrote:
The 6mm is six square mm. The size of the conductor cross section.
Nothing to do with the outer sheath size.


Not in this case it isn't.

6mm cable is what you would use for a cooker.

The cable you have looks like 1.5mm arctic blue.

1.5 being the CSA of the cores, arctic because it can be used to 20 degrees below zero, and blue because its for 240v not 110v

You want something like 0.75 mm black rubber flex

Cable size is roughly worked out by how much current will be required and length of cable run.

And if any one wants to be pedantic, its supposed to be black pvc conduit outside (Or galvanised) not white, as black is UV stabilised.

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Last edited by someone-else on Sat Jul 28, 2018 2:26 pm, edited 1 time in total.

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 Post subject: Re: exposed wiring help
PostPosted: Sat Jul 28, 2018 2:25 pm 
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someone-else wrote:
Dave54 wrote:
The 6mm is six square mm. The size of the conductor cross section.
Nothing to do with the outer sheath size.


Not in this case it isn't.

6mm cable is what you would use for a cooker.


What else is the 6mm then if not the csa in sq. mm?
It's marked "3 X 6 mm squared"

But what has the 6 mm got to do with the outer sheath size?


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 Post subject: Re: exposed wiring help
PostPosted: Sat Jul 28, 2018 2:29 pm 
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Dave54 wrote:

What else is the 6mm then if not the csa in sq. mm?

But what has the 6 mm got to do with the outer sheath size?



I do not know, I will find out later (going out now) but as I said 6mm CSA cable is used for cookers and small showers, that cable is more like 1.5mm

have a google for pictures of 6mm cable. Don't look at screwfix they use the same picture for all the cable sizes

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Which is correct? Metre or Meter? Click the link to find out more.

Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

If gloom had a voice, it would be me. :mrgreen:

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