Cable Size

[one of the hidden]

Hello Everybody!

 

...i'm looking to install 2 of these...

 

http://www.quietpc.com/nf-s12a-uln

 

...in series...

 

...to circulate warm air around my narrow boat...

 

...from the point of connection and back is 25 metres...

 

...can anybody tell me what size of cable i need, cross-sectional area...

 

...i'm thinking of using good quality speaker wire...

 

...the system is 12 volt...

 

Thank you!

 

ps. if link doesn't work cut & paste it into the browser window.

[Bod]

Looks flash!

Voltage drop will be the problem, search for "Cable Calculator".

The wire required will be much thicker than speaker wire.

 

Bod

[MtB]

At 0.6 Amp current draw (according to the spec) at 12v I'd say decent quality speaker wire would be fine.

 

So there we are. Two opposing views immediately!

 

 

MtB

P.S. Welcome to the forum!

[Roger Crown]

Hello Everybody!

 

...i'm looking to install 2 of these...

 

http://www.quietpc.com/nf-s12a-uln

 

...in series...

 

...to circulate warm air around my narrow boat...

 

...from the point of connection and back is 25 metres...

 

...can anybody tell me what size of cable i need, cross-sectional area...

 

...i'm thinking of using good quality speaker wire...

 

...the system is 12 volt...

 

Thank you!

 

ps. if link doesn't work cut & paste it into the browser window.

 

At 0.6 Amp current draw (according to the spec) at 12v I'd say decent quality speaker wire would be fine.

 

 

Are you sure Mike?

 

To add, what size is "decent quality" speaker wire? And does it have a minimum of 28 strands per conductor?

[MtB]

The 'decent quality' speaker wire I have here is 1.5mm² per conductor. Plenty for 0.6 Amp over 13m.

 

MtB

[Jim Riley]

Got a stove? Try one of these. http://www.ecofan.co.uk

Wireless.

Edited November 8, 2014 by Jim Riley

[dmr]

As MtB says, at less than an amp cable size just won't be an issue.

I am a bit concerned that you plan to wire these in series rather than parallel, please explain why?, or do you mean placing one behind the other????

I don't believe the spec of 6dBA noise level!!!

 

.............Dave

with 1.5mm cable and a current of 1amp over 25m I calculate a volt drop of 0.27 volts.

 

...........Dave

[jonathanA]

As per other posters pretty much any speaker flex or cable of 0.5mm or more will be fine

 

Think about a suitable small fuse for protection

[John V]

 

To add, what size is "decent quality" speaker wire? And does it have a minimum of 28 strands per conductor?

According to a HiFi designer I used to know the best speaker cable was solid core single crystal copper 2.5 mm but he reckoned 2.5mm T&E electical installation cable was so near as to be almost indistinguishable !!!

Edited November 8, 2014 by John V

[Paul's Nulife4-2]

I've got a cpl of these dotted about the boat, I've just un mounted one from it's home at Floor level and took a snap, mine is about 0.40 Amp, and tiny wire of say 1mm Diameter.They are BRILLIANT for circulating air, I use them a lot in the summer,

 

https://www.dropbox.com/s/p5s71uy94obfg6h/IMAG0604.jpg?dl=0

What I will suggest is try and fit some sort or Speed regulator, as they really do Belt around, and to be honest, They are not 'quite' IMO.

So being able to Slow it down would make a difference in sound.

Edited November 8, 2014 by Paul's Nulife4-2

[ditchcrawler]

I used 3 in series on 24 volts but found 4 just didn't hack it.

[Zig Zag]

In my cottage I had some beautiful van damme 4mm speaker cable. Was sooo gooood. The wife hated it.

 

But a very knowledgeable sound engineer I know echoes that about twin and earth being just as good as expensive speak cable.

[mango]

In my cottage I had some beautiful van damme 4mm speaker cable. Was sooo gooood. The wife hated it.

 

But a very knowledgeable sound engineer I know echoes that about twin and earth being just as good as expensive speak cable.

My understanding is that although claims that expensive cables made of thick, multi-stranded oxygen-free copper and gold-plated connections will add definition and dynamic depth, their undoubted advantage is that they boost the ego.

[Arthur Brown]

As 12v fans they will need 12v so be careful about series wiring (are you a 24v boat?)

even at 1.2 amps for both fans running any 1.o to 1.5 mm^2 cable will be fine.

[jonathanA]

Err no if running them in series it will the same .6 amp through both you could use bell wire !

 

Some 0.5 mm two core round / oval mains flex ?

[Alway Swilby]

I've got a cpl of these dotted about the boat, I've just un mounted one from it's home at Floor level and took a snap, mine is about 0.40 Amp, and tiny wire of say 1mm Diameter.They are BRILLIANT for circulating air, I use them a lot in the summer,

 

https://www.dropbox.com/s/p5s71uy94obfg6h/IMAG0604.jpg?dl=0

What I will suggest is try and fit some sort or Speed regulator, as they really do Belt around, and to be honest, They are not 'quite' IMO.

So being able to Slow it down would make a difference in sound.

The fan in the dropbox link is not the same as the fan in the OP. I have had stuff from Quiet PC (as per OP) before and it has always been very quiet.

Edited November 10, 2014 by Alway Swilby

[Paul's Nulife4-2]

The fan in the dropbox link is not the same as the fan in the OP. I have had stuff from Quiet PC (as per OP) before and it has always been very quiet.

Ahh,

Maybe I should check out Quiet PC fans myself,