150m Cable run outside to spur?

[Connor2425]

What would be the required cable for this type of run?

Thanks

 

[Gazthesparky]

A big one

 

[Connor2425]

Thanks

 

[telectrix]

how fast do you want it to run?

 

[Connor2425]

Comedy night?

 

[Megavolt]

Lol nice one I will get the crystel ball out a

 

[Gazthesparky]

Give us a chance and some proper information on what you are trying to do are you a spark ?

A run of that length will need a big cable

Lots of things have to be considered

 

[Connor2425]

No just abit of advice, its a spur to feed 12v power supplies 150m away from the main building.

 

[Plonker 3]

Oh well that helps no end!!!!!

 

[Connor2425]

Forget it

 

[not clever]

:bigcry::bigcry::bigcry:

 

[Connor2425]

2 late ********* ill just have to ring around

 

[not clever]

That'll be 300 meters if you put it on a ring...........I'd just use 4mm, but with **** all info its a little difficult to help....some people......humph

 

[Darkwood]

12vsupply ? for what ... 150m you give no info to installation methods, load characteristics etc ...


Are you sending out 230v then its been transoformed or are you expecting 12v to get that far without major Volts Drop issues.... you are getting non-helpful replies because you ask a question that requires a lot of info yet you supply little...


So my answer to you OP is you need an Electrician to come and design and install it... unless you can fill all my questions in?

 

[Connor2425]

What info do you need? Im asking for the advice.

 

[Connor2425]

Right. one piece of cable from a board to a spur 150m away, the spur is to feed a 12 v power supply. the cable is a straight run externally clipped to a wall. any other info you are looking for you may need to ask me.

 

[Darkwood]

What voltage are you exporting... i.e. is it been transformed at load from mains or are you thinking 12v from source to load?
What are the installation methods?
What is the load and characteristics?
and out of curiosity what is the load?

 

[Connor2425]

3 x 12v 1.5amp PSU's

 

[not clever]

Okay my advice is CALL A LOCAL ELECTRICIAN, because you aren't wanting to give any info to us to help you.
What is the expected load
How is the cable to be installed
Is it 230 or 12 volt you are trying to get outside
Is the whole 250 meter run external or internal


That's better.

 

[Plonker 3]

At which end is the 12 volt needed?

At the end of the 150 meter run? Or will the cable be carrying 12 for 150 meters?

What type of cable are you looking at using?

 

[Connor2425]

********

should I do a drawing?

one end the board-----150m (clipped to a wall externally!!)------other end the spur<<<12 v power supply

I need to have the 240v closer to where I need the 12v as obviously i cant run 12v over that distance

 

[Plonker 3]

Right we are getting there, slowly and with offensive responses.

Now, what are the power ratings of the transformers at 230 volt? What sort of cable are you looking at using?

 

[Connor2425]

Dillb thats the 3rd time ive posted whats happening

 

[Plonker 3]

And the 4 time you haven't answered all the questions asked.

I'm ooot

 

[Connor2425]

PSU's are 12v 1.5a DC

- - - Updated - - -

PSU's are 12v 1.5a DC

 

[Darkwood]

This is an external wiring install and off the cuff i will suggest you need to run it at 230v until load then transform it down.. as you are running mains outdoors you really need to get a local sparks to assess the situe and advice onsite their are too many questions here and everytime you answer you just leave us asking more questions... you can't export 12v over that length in realistic terms... you haven't really given us a fraction of the info relating to cable calcs and thus suggests you are out of your depth... this install could seem a simple request but can have many requirements to ensure it is safe even after cable selection even the characteristics of the incoming supply could change the way this install is done depending on where/how you terminate you 230v.

Note the time lag in me writing this post and you supplying some further info in case you have already answered what i ask.... ?

 

[Gazthesparky]

If you list your location I'm sure there will be a member who is close to you who could come round and inspect and quote for carrying out the work

 

[Connor2425]

lol wow, just wow. I give up. do you even read the previous posts?

This will be done by my electrician who is well in depth, I was just interested in the cable size so i could price it up.

Like I said forget it, Ill have a ring round.

 

[Plonker 3]

lol wow, just wow. I give up. do you even read the previous posts?

This will be done by my electrician who is well in depth, I was just interested in the cable size so i could price it up.

Like I said forget it, Ill have a ring round.

Ahh a DIY question, makes sense now.

 

[Connor2425]

Oh so you read that one Dillb?

Far from DIY, a simple question that im sure someone will advise on.

I just seem to be asked the same question over and over?

 

[Gazthesparky]

lol wow, just wow. I give up. do you even read the previous posts?

This will be done by my electrician who is well in depth, I was just interested in the cable size so i could price it up.

Like I said forget it, Ill have a ring round.

And where exactly did you say that you had an electrician carrying out the work ??

Also your electrician will get differnt prices from his wholesaler which you will unlikely be able to beat due to the fact he gets trade prices so ringing round getting prices is pointless and surely you spark has quoted you a price for the work so why worry ???

 

[Lucien Nunes]

Read INPUT current rating on label on power supply. Multiply by 3. Post answer. This info was needed at post #1.

 

[spark 68]

It is not a simple question at all though, there are many variables to take into account, not just electrical ones but environmental ones too.

sheesh

 

[Plonker 3]

I read every one of your replies and asked questions accordingly, you were unable to answer what I asked so in return wouldn't have been able to answer your question with out the required information

You obviously don't have a proper understanding of electrical principles. These questions are asked for a reason not to slip you up. There is a DIY forum for this sort of reason, which would also explain some of the replies you recieved originally.

 

[Connor2425]

Since when do I have to tell you I have a spark to carry out the work?

I wont be ringing round Ill be ringing Neweys and putting it on my account, I literally just wanted a size.

Ive had 2 quotes with different cable sizes hence the question, any other things you need to know?

 

[Darkwood]

Sorry Conner but you have posted in the general forum and this should be in the DIY section ... posting in here will give members an assumption you are competent to some extent unless you tell us otherwise.... as you haven't this has led to the barage of unhelpful replies... although it late and some members may not have anything better to do than slate it is clear you are not competent in relation to your question and i would have thought rather than kick you while your down some members could have suggested your in the wrong section.... You have my apologies for the lack of help...

 

[Connor2425]

At which end is the 12 volt needed?

At the end of the 150 meter run? Or will the cable be carrying 12 for 150 meters?

What type of cable are you looking at using?

This....Really

 

[Lucien Nunes]

You wanted to know cable size, which is determined by load current. By post 35, you still haven't told us what that is, although we can now at least guess

 

[Connor2425]

Sorry Conner but you have posted in the general forum and this should be in the DIY section ... posting in here will give members an assumption you are competent to some extent unless you tell us otherwise.... as you haven't this has led to the barage of unhelpful replies... although it late and some members may not have anything better to do than slate it is clear you are not competent in relation to your question and i would have thought rather than kick you while your down some members could have suggested your in the wrong section.... You have my apologies for the lack of help...

lol oh right so its the wrong section, thats the reason for all the smart arse comments, i get it.

 

[Connor2425]

You wanted to know cable size, which is determined by load current. By post 35, you still haven't told us what that is, although we can now at least guess

Right well if thats what I need to do Ill get it. thats was easy

 

[Plonker 3]

Yes, there was reason why that section was opened. This thread is one of them.

 

[Plonker 3]

Right well if thats what I need to do Ill get it. thats was easy

About half an hour too late

Now, what are the power ratings of the transformers at 230 volt?

 

[happysteve]

I'm just a trainee so don't listen to me, I guess the following is more aimed at the experienced and qualified folks:

If the largest voltage drop I can find in appendix 4 of the OSG is 44mV/A/m (1mm^2), then the largest voltage drop is going to be 6.6V/A over 150m. Assuming these 3 transformers are not wildly inefficient, they're going to be drawing less than an amp at 230V... so even if they're not switch mode PSUs they're probably still going to be ok.

So (aside from environmental protection and other stuff I've not thought of and have yet to learn about), what's up with doing a rough calculation as above and saying, "the smallest SWA you can get"?

 

[Connor2425]

About half an hour too late

No Dilb instead of the **** comments you should just ask that if you trying to help, if not dont bother

 

[Plonker 3]

I did try, but your attitude stinks.

 

[Darkwood]

Volts drop has different allowances for specific load types although at such low load it may not effect cable size we need to know the load characteristics not just the load rating ...i ask a few times as you haven't responded with an answer we cannot really give assistance... the distance is excessive so for our help you need to answer what we ask ... if it was several meters we could give an educated guess ... the supply has to meet ZS requirements so trip times are met under fault again not to difficult with short runs but 150m is a bit of a run... i have 3 pubs within 150m of my house by comparison.

 

[Connor2425]

HappySteve, thanks for the info, Dilb take note.

 

[happysteve]

Knew there was summat. Zs. Sorry. ~embarrassed~

 

[Connor2425]

Volts drop has different allowances for specific load types although at such low load it may not effect cable size we need to know the load characteristics not just the load rating ...i ask a few times as you haven't responded with an answer we cannot really give assistance... the distance is excessive so for our help you need to answer what we ask ... if it was several meters we could give an educated guess ... the supply has to meet ZS requirements so trip times are met under fault again not to difficult with short runs but 150m is a bit of a run... i have 3 pubs within 150m of my house by comparison.

Ok so ill get the relevant info when on site tomorrow.

 

[happysteve]

HappySteve, thanks for the info, Dilb take note.

Nah, don't thank me, and I'll reiterate don't listen to me. Just learning, and as DW states above I made a rooky error because I forgot summat basic.

To be honest, I'm more with Dillb on this...