dean1973
Active Member
any sparks on here what is the best size wire to use on a 4.2 amp 3 metre run is there a site with a chart on cheers dean
24v eletric wire
- Thread starter dean1973
- Start date
paulburton44
Well-Known Member
Voltage doesn't matter..... the cable must be able to carry the current (amps)
I would use a 1.5mm cable for 4.2 amps.... You could use smaller...
As long as the insullation is rated for the voltage...!!
I would use a 1.5mm cable for 4.2 amps.... You could use smaller...
As long as the insullation is rated for the voltage...!!
bobgoode
Well-Known Member
google index marine and look up cable, there is a voltager drop formula and all the data needed there.
pvb
Well-Known Member
The easiest chart I\'ve seen so far...
You haven't said what the wire is feeding, or where it is (both of which may affect the right choice). The easiest chart I've seen so far is this one on the Blue Sea Systems website. It talks you through the various considerations, and allows an accurate result to be achieved. The only problem is that it gives the result as an AWG (American Wire Gauge) figure - look here on the Index Marine site for a conversion table to approx sq mm size.
You haven't said what the wire is feeding, or where it is (both of which may affect the right choice). The easiest chart I've seen so far is this one on the Blue Sea Systems website. It talks you through the various considerations, and allows an accurate result to be achieved. The only problem is that it gives the result as an AWG (American Wire Gauge) figure - look here on the Index Marine site for a conversion table to approx sq mm size.
paulburton44
Well-Known Member
Re: The easiest chart I\'ve seen so far...
Using those 2 links is gives 18awg which is .8mm cable.....
I would still say use 1.5mm
Using those 2 links is gives 18awg which is .8mm cable.....
I would still say use 1.5mm
pvb
Well-Known Member
Re: The easiest chart I\'ve seen so far...
Well, you can of course (and indeed should) use whatever wire you feel happiest with, but there's not much point using a wire calculator if you then ignore the results! /forums/images/graemlins/wink.gif
By the way, your claim that "Voltage doesn't matter....." isn't correct - if you don't know the voltage you can't calculate the percentage voltage drop, which is the factor most commonly used in deciding wire size.
Well, you can of course (and indeed should) use whatever wire you feel happiest with, but there's not much point using a wire calculator if you then ignore the results! /forums/images/graemlins/wink.gif
By the way, your claim that "Voltage doesn't matter....." isn't correct - if you don't know the voltage you can't calculate the percentage voltage drop, which is the factor most commonly used in deciding wire size.
ShaunG
Well-Known Member
I normally point people to this
http://www.power-store.com/includes/download.asp?docid=627
it's a nice little program you can download to your desktop, enter voltage, current and cable run
Regards
Shaun
http://www.power-store.com/includes/download.asp?docid=627
it's a nice little program you can download to your desktop, enter voltage, current and cable run
Regards
Shaun
reeac
Well-Known Member
Re: The easiest chart I\'ve seen so far...
[ QUOTE ]
Well, you can of course (and indeed should) use whatever wire you feel happiest with, but there's not much point using a wire calculator if you then ignore the results! /forums/images/graemlins/wink.gif
By the way, your claim that "Voltage doesn't matter....." isn't correct - if you don't know the voltage you can't calculate the percentage voltage drop, which is the factor most commonly used in deciding wire size.
[/ QUOTE ]
Personally, I would use the calculator but then if it gave a very small min. wire diameter I'd probably increase that figure to boost its mechanical strength unless it was going to be in a very protected environment.
[ QUOTE ]
Well, you can of course (and indeed should) use whatever wire you feel happiest with, but there's not much point using a wire calculator if you then ignore the results! /forums/images/graemlins/wink.gif
By the way, your claim that "Voltage doesn't matter....." isn't correct - if you don't know the voltage you can't calculate the percentage voltage drop, which is the factor most commonly used in deciding wire size.
[/ QUOTE ]
Personally, I would use the calculator but then if it gave a very small min. wire diameter I'd probably increase that figure to boost its mechanical strength unless it was going to be in a very protected environment.
dean1973
Active Member
Re: The easiest chart I\'ve seen so far...
thank you all for your help iam fitting out a new charter boat from just the mouldings 3 half weeks in and all is going well bulk heads in console and tanks rendy to lay deck when weve done some of the fit out
thank you all for your help iam fitting out a new charter boat from just the mouldings 3 half weeks in and all is going well bulk heads in console and tanks rendy to lay deck when weve done some of the fit out
pvb
Well-Known Member
Maybe post some pics one day...
Good luck with your project. Maybe you might be able to post some pics of the progress from time to time?
Good luck with your project. Maybe you might be able to post some pics of the progress from time to time?
