I am trying to find a chart for the Ampacity of copper wire.

I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...

Where can I find a chart like that ?

Thanks
Sid.

On Thursday, March 30, 2023 at 11:30:27 PM UTC-4, Sid 03 wrote:
> I am trying to find a chart for the Ampacity of copper wire.
>
> I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...
>
> Where can I find a chart like that ?
>
> Thanks
> Sid.

I started here...

https://www.google.com/search?client=firefox-b-1-d&q=wire+gauge+amp+chart

and ran through a few links until I found this.

https://www.powerstream.com/Wire_Size.htm

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

On Thursday, March 30, 2023 at 10:30:27 PM UTC-5, Sid 03 wrote:
> I am trying to find a chart for the Ampacity of copper wire.
>
> I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...
>
> Where can I find a chart like that ?
>
> Thanks
> Sid.

Maybe these will help.
<https://www.inchcalculator.com/wire-size-calculator/>
<https://www.nooutage.com/vdrop.htm>

On Thursday, March 30, 2023 at 11:30:27 PM UTC-4, Sid 03 wrote:
> I am trying to find a chart for the Ampacity of copper wire.
>
> I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...
>
> Where can I find a chart like that ?

Real ratings are much more complicated than that. Ampacity ratings are also a strong function of the wire insulation. There are 20 ga. products with high temperature insulation rated for 50 Amps! Of course that's for short length connections like internal wiring of industrial equipment where space must be conserved. There are other situations in which the nominal ampacity rating of wiring must be derated (reduced) due to other factors, a common one being multiple conductors in a run of conduit where the heat dissipation might not be so good, requiring a derating to 70% or less of nominal.

https://www.nfpa.org/~/media/Files/Code%20or%20topic%20fact%20sheets/NECAmpacityWorkflow.pdf

>
> Thanks
> Sid.

On Thursday, March 30, 2023 at 10:30:27 PM UTC-5, Sid 03 wrote:
> I am trying to find a chart for the Ampacity of copper wire.
>
> I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...
>
> Where can I find a chart like that ?
>
> Thanks
> Sid.

What do you want to wire?

On 31/03/2023 04:30, Sid 03 wrote:
> I am trying to find a chart for the Ampacity of copper wire.
>
> I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...
>
> Where can I find a chart like that ?
>
> Thanks
> Sid.

Ampacity depends on ohmitude and allowable fahrenheitery, but is largely
independent of voltaciousness.

--
Cheers
Clive

On Fri, 31 Mar 2023 06:30:50 -0700 (PDT), Fred Bloggs
<bloggs.fredbloggs.fred@gmail.com> wrote:

>On Thursday, March 30, 2023 at 11:30:27?PM UTC-4, Sid 03 wrote:
>> I am trying to find a chart for the Ampacity of copper wire.
>>
>> I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...
>>
>> Where can I find a chart like that ?
>
>Real ratings are much more complicated than that. Ampacity ratings are also a strong function of the wire insulation. There are 20 ga. products with high temperature insulation rated for 50 Amps! Of course that's for short length connections like internal wiring of industrial equipment where space must be conserved. There are other situations in which the nominal ampacity rating of wiring must be derated (reduced) due to other factors, a common one being multiple conductors in a run of conduit where the heat dissipation might not be so good, requiring a derating to 70% or less of nominal.
>
>https://www.nfpa.org/~/media/Files/Code%20or%20topic%20fact%20sheets/NECAmpacityWorkflow.pdf
>
>>
>> Thanks
>> Sid.

I experimented on ribbon cables as regards current limits. They have
unique geometry and allow some interesting choices of spacing and
parallelism. Of course the limits depend powerfully on air flow.

I have in mind some modules plugged into a rackmount chassis, each
doing 12 channels of a test function, with four common busses. I'll
have short ribbon cable jumpers between modules to extend the function
in groups of 12. A 20-wire cable could use 5 wires per buss, or 4 with
grounds between, or something. Or use a 16 wide ribbon with 4 per.
Fortunately, there will be predictable air flow.

Why play chess or do crosswords when you can design electronics?

In article <69d32713-8605-44af-a9a9-cab7cfc69fc0n@googlegroups.com>,
bloggs.fredbloggs.fred@gmail.com says...
>
> > I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...
> >
> > Where can I find a chart like that ?
>
> Real ratings are much more complicated than that. Ampacity ratings are also a strong function of the wire insulation. There are 20 ga. products with high temperature insulation rated for 50 Amps! Of course that's for short length connections like internal wiring of industrial equipment where space must be conserved. There are
other situations in which the nominal ampacity rating of wiring must be derated (reduced) due to other factors, a common one being multiple conductors in a run of conduit where the heat dissipation might not be so good, requiring a derating to 70% or less of nominal.
>
> https://www.nfpa.org/~/media/Files/Code%20or%20topic%20fact%20sheets/NECAmpacityWorkflow.pdf
>
>
>

Yes wire sizes for amperage can vary all over the place. It depends on
how much hear rise you can stand and if it is open air or enclosed such
as in a transformer or conduit.

About the only 'real' chart is one that I saw where the wire would melt
out in open air.

Saw where some wire was being sold in dropcords and listed as say # 12
wire but was actually a few wire sizes smaller like # 14. Reason being
given wes the insulation was rated for a higher heat. Still does not
compensate for the voltage drop.

On Friday, March 31, 2023 at 9:29:20 AM UTC-5, John Larkin wrote:
> On Fri, 31 Mar 2023 06:30:50 -0700 (PDT), Fred Bloggs
> <bloggs.fred...@gmail.com> wrote:
> >On Thursday, March 30, 2023 at 11:30:27?PM UTC-4, Sid 03 wrote:
> >> I am trying to find a chart for the Ampacity of copper wire.
> >>
> >> I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...
> >>
> >> Where can I find a chart like that ?
> >
> >Real ratings are much more complicated than that. Ampacity ratings are also a strong function of the wire insulation. There are 20 ga. products with high temperature insulation rated for 50 Amps! Of course that's for short length connections like internal wiring of industrial equipment where space must be conserved. There are other situations in which the nominal ampacity rating of wiring must be derated (reduced) due to other factors, a common one being multiple conductors in a run of conduit where the heat dissipation might not be so good, requiring a derating to 70% or less of nominal.
> >
> >https://www.nfpa.org/~/media/Files/Code%20or%20topic%20fact%20sheets/NECAmpacityWorkflow.pdf
> >
> >>
> >> Thanks
> >> Sid.
> I experimented on ribbon cables as regards current limits. They have
> unique geometry and allow some interesting choices of spacing and
> parallelism. Of course the limits depend powerfully on air flow.
>
> I have in mind some modules plugged into a rackmount chassis, each
> doing 12 channels of a test function, with four common busses. I'll
> have short ribbon cable jumpers between modules to extend the function
> in groups of 12. A 20-wire cable could use 5 wires per buss, or 4 with
> grounds between, or something. Or use a 16 wide ribbon with 4 per.
> Fortunately, there will be predictable air flow.
>
> Why play chess or do crosswords when you can design electronics?

How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.

On Fri, 31 Mar 2023 12:01:43 -0700 (PDT), Dean Hoffman
<deanh6929@gmail.com> wrote:

>On Friday, March 31, 2023 at 9:29:20?AM UTC-5, John Larkin wrote:
>> On Fri, 31 Mar 2023 06:30:50 -0700 (PDT), Fred Bloggs
>> <bloggs.fred...@gmail.com> wrote:
>> >On Thursday, March 30, 2023 at 11:30:27?PM UTC-4, Sid 03 wrote:
>> >> I am trying to find a chart for the Ampacity of copper wire.
>> >>
>> >> I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...
>> >>
>> >> Where can I find a chart like that ?
>> >
>> >Real ratings are much more complicated than that. Ampacity ratings are also a strong function of the wire insulation. There are 20 ga. products with high temperature insulation rated for 50 Amps! Of course that's for short length connections like internal wiring of industrial equipment where space must be conserved. There are other situations in which the nominal ampacity rating of wiring must be derated (reduced) due to other factors, a common one being multiple conductors in a run of conduit where the heat dissipation might not be so good, requiring a derating to 70% or less of nominal.
>> >
>> >https://www.nfpa.org/~/media/Files/Code%20or%20topic%20fact%20sheets/NECAmpacityWorkflow.pdf
>> >
>> >>
>> >> Thanks
>> >> Sid.
>> I experimented on ribbon cables as regards current limits. They have
>> unique geometry and allow some interesting choices of spacing and
>> parallelism. Of course the limits depend powerfully on air flow.
>>
>> I have in mind some modules plugged into a rackmount chassis, each
>> doing 12 channels of a test function, with four common busses. I'll
>> have short ribbon cable jumpers between modules to extend the function
>> in groups of 12. A 20-wire cable could use 5 wires per buss, or 4 with
>> grounds between, or something. Or use a 16 wide ribbon with 4 per.
>> Fortunately, there will be predictable air flow.
>>
>> Why play chess or do crosswords when you can design electronics?
>
> How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.

Some of it is work. But designing is fun.

On Friday, March 31, 2023 at 2:48:08 PM UTC-5, John Larkin wrote:
> On Fri, 31 Mar 2023 12:01:43 -0700 (PDT), Dean Hoffman
> <dean...@gmail.com> wrote:
> >On Friday, March 31, 2023 at 9:29:20?AM UTC-5, John Larkin wrote:
> >> On Fri, 31 Mar 2023 06:30:50 -0700 (PDT), Fred Bloggs
> >> <bloggs.fred...@gmail.com> wrote:
> >> >On Thursday, March 30, 2023 at 11:30:27?PM UTC-4, Sid 03 wrote:
> >> >> I am trying to find a chart for the Ampacity of copper wire.
> >> >>
> >> >> I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...
> >> >>
> >> >> Where can I find a chart like that ?
> >> >
> >> >Real ratings are much more complicated than that. Ampacity ratings are also a strong function of the wire insulation. There are 20 ga. products with high temperature insulation rated for 50 Amps! Of course that's for short length connections like internal wiring of industrial equipment where space must be conserved. There are other situations in which the nominal ampacity rating of wiring must be derated (reduced) due to other factors, a common one being multiple conductors in a run of conduit where the heat dissipation might not be so good, requiring a derating to 70% or less of nominal..
> >> >
> >> >https://www.nfpa.org/~/media/Files/Code%20or%20topic%20fact%20sheets/NECAmpacityWorkflow.pdf
> >> >
> >> >>
> >> >> Thanks
> >> >> Sid.
> >> I experimented on ribbon cables as regards current limits. They have
> >> unique geometry and allow some interesting choices of spacing and
> >> parallelism. Of course the limits depend powerfully on air flow.
> >>
> >> I have in mind some modules plugged into a rackmount chassis, each
> >> doing 12 channels of a test function, with four common busses. I'll
> >> have short ribbon cable jumpers between modules to extend the function
> >> in groups of 12. A 20-wire cable could use 5 wires per buss, or 4 with
> >> grounds between, or something. Or use a 16 wide ribbon with 4 per.
> >> Fortunately, there will be predictable air flow.
> >>
> >> Why play chess or do crosswords when you can design electronics?
> >
> > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
> Some of it is work. But designing is fun.

A co-worker from long ago would say the difference between work and play depended on which way the money flowed. I was lucky to find something I liked doing and was able to do it all of my working years. Now I can sit around and wonder how people can possibly get along without my experience and wisdom. Think old fart at the coffee shop.

In article <n5ee2i1sfuok1a8shv4vk154d3prvhm0qt@4ax.com>,
jlarkin@highlandSNIPMEtechnology.com says...
>
> >> Why play chess or do crosswords when you can design electronics?
> >
> > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
>
> Some of it is work. But designing is fun.
>
>
>

Where I worked about 3/4 of the time was fun. The other 1/4 of the time
was work because I did not enjoy that part. If I could have paid the
bills I would have done the 3/4 time for nothing. Is it work or fun for
the people doing sports ? Even the chess can be a job or for fun or
both. Golf is probably the best paying job for fun. Not much physical
abuse to the body compaired to other sports.

On Friday, March 31, 2023 at 5:19:31 PM UTC-5, Ralph Mowery wrote:
> In article <n5ee2i1sfuok1a8sh...@4ax.com>,
> jla...@highlandSNIPMEtechnology.com says...
> >
> > >> Why play chess or do crosswords when you can design electronics?
> > >
> > > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
> >
> > Some of it is work. But designing is fun.
> >
> >
> >
> Where I worked about 3/4 of the time was fun. The other 1/4 of the time
> was work because I did not enjoy that part. If I could have paid the
> bills I would have done the 3/4 time for nothing. Is it work or fun for
> the people doing sports ? Even the chess can be a job or for fun or
> both. Golf is probably the best paying job for fun. Not much physical
> abuse to the body compaired to other sports.

Yes, "Yes wire sizes for amperage can vary all over the place." is exactly what I found.
I used the calculator that was linked and it shows that AWG 40 was suitable for 1 amp at 1 foot long ?
I thought the rule etched it stone was the #10 was used for 30 Amp, #12 for 20 Amps, and #14 for Amps, where does this standard come from ?
And why can't I find a chart that follows the AWG down into the 2? AWG gauges ?
Years ago I had a shop class where the instructor stated that 18 AWG was good for 3 amps and another instructor stated that 18 AWG was good for 5 amps maximum.
I just thought it would be simple to find a chart that definitively shows the small AWG(s)

Thanks

On Saturday, April 1, 2023 at 12:25:42 AM UTC+1, Sid 03 wrote:
> On Friday, March 31, 2023 at 5:19:31 PM UTC-5, Ralph Mowery wrote:
> > In article <n5ee2i1sfuok1a8sh...@4ax.com>,
> > jla...@highlandSNIPMEtechnology.com says...
> > >
> > > >> Why play chess or do crosswords when you can design electronics?
> > > >
> > > > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
> > >
> > > Some of it is work. But designing is fun.
> > >
> > >
> > >
> > Where I worked about 3/4 of the time was fun. The other 1/4 of the time
> > was work because I did not enjoy that part. If I could have paid the
> > bills I would have done the 3/4 time for nothing. Is it work or fun for
> > the people doing sports ? Even the chess can be a job or for fun or
> > both. Golf is probably the best paying job for fun. Not much physical
> > abuse to the body compaired to other sports.
> Yes, "Yes wire sizes for amperage can vary all over the place." is exactly what I found.
> I used the calculator that was linked and it shows that AWG 40 was suitable for 1 amp at 1 foot long ?
> I thought the rule etched it stone was the #10 was used for 30 Amp, #12 for 20 Amps, and #14 for Amps, where does this standard come from ?
> And why can't I find a chart that follows the AWG down into the 2? AWG gauges ?
> Years ago I had a shop class where the instructor stated that 18 AWG was good for 3 amps and another instructor stated that 18 AWG was good for 5 amps maximum.
> I just thought it would be simple to find a chart that definitively shows the small AWG(s)
>
> Thanks

There's no definitive answer, unless you have to follow recognized standard.. A rule of thumb for copper wiring fusing current is 80*d^1.5 (d = diameter in mm) and then to design with a safety factor (say 1/20th of that).

On Friday, March 31, 2023 at 6:25:42 PM UTC-5, Sid 03 wrote:
> On Friday, March 31, 2023 at 5:19:31 PM UTC-5, Ralph Mowery wrote:
> > In article <n5ee2i1sfuok1a8sh...@4ax.com>,
> > jla...@highlandSNIPMEtechnology.com says...
> > >
> > > >> Why play chess or do crosswords when you can design electronics?
> > > >
> > > > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
> > >
> > > Some of it is work. But designing is fun.
> > >
> > >
> > >
> > Where I worked about 3/4 of the time was fun. The other 1/4 of the time
> > was work because I did not enjoy that part. If I could have paid the
> > bills I would have done the 3/4 time for nothing. Is it work or fun for
> > the people doing sports ? Even the chess can be a job or for fun or
> > both. Golf is probably the best paying job for fun. Not much physical
> > abuse to the body compaired to other sports.
> Yes, "Yes wire sizes for amperage can vary all over the place." is exactly what I found.
> I used the calculator that was linked and it shows that AWG 40 was suitable for 1 amp at 1 foot long ?
> I thought the rule etched it stone was the #10 was used for 30 Amp, #12 for 20 Amps, and #14 for Amps, where does this standard come from ?
> And why can't I find a chart that follows the AWG down into the 2? AWG gauges ?
> Years ago I had a shop class where the instructor stated that 18 AWG was good for 3 amps and another instructor stated that 18 AWG was good for 5 amps maximum.
> I just thought it would be simple to find a chart that definitively shows the small AWG(s)
>
> Thanks

I searched for 24 awg ampacity. Several tables for small wire gauge showed up. \
<https://www.powerstream.com/Wire_Size.htm>. Is this of any use?

On Fri, 31 Mar 2023 14:12:31 -0700 (PDT), Dean Hoffman
<deanh6929@gmail.com> wrote:

>On Friday, March 31, 2023 at 2:48:08?PM UTC-5, John Larkin wrote:
>> On Fri, 31 Mar 2023 12:01:43 -0700 (PDT), Dean Hoffman
>> <dean...@gmail.com> wrote:
>> >On Friday, March 31, 2023 at 9:29:20?AM UTC-5, John Larkin wrote:
>> >> On Fri, 31 Mar 2023 06:30:50 -0700 (PDT), Fred Bloggs
>> >> <bloggs.fred...@gmail.com> wrote:
>> >> >On Thursday, March 30, 2023 at 11:30:27?PM UTC-4, Sid 03 wrote:
>> >> >> I am trying to find a chart for the Ampacity of copper wire.
>> >> >>
>> >> >> I found a lot of charts that show AWG 10 for 30Amps, 12 for 20Amps, and 14 for 15amps. But I am looking for a chart that will show the smaller gauge wires like AWG 18, 20, 22 ...
>> >> >>
>> >> >> Where can I find a chart like that ?
>> >> >
>> >> >Real ratings are much more complicated than that. Ampacity ratings are also a strong function of the wire insulation. There are 20 ga. products with high temperature insulation rated for 50 Amps! Of course that's for short length connections like internal wiring of industrial equipment where space must be conserved. There are other situations in which the nominal ampacity rating of wiring must be derated (reduced) due to other factors, a common one being multiple conductors in a run of conduit where the heat dissipation might not be so good, requiring a derating to 70% or less of nominal.
>> >> >
>> >> >https://www.nfpa.org/~/media/Files/Code%20or%20topic%20fact%20sheets/NECAmpacityWorkflow.pdf
>> >> >
>> >> >>
>> >> >> Thanks
>> >> >> Sid.
>> >> I experimented on ribbon cables as regards current limits. They have
>> >> unique geometry and allow some interesting choices of spacing and
>> >> parallelism. Of course the limits depend powerfully on air flow.
>> >>
>> >> I have in mind some modules plugged into a rackmount chassis, each
>> >> doing 12 channels of a test function, with four common busses. I'll
>> >> have short ribbon cable jumpers between modules to extend the function
>> >> in groups of 12. A 20-wire cable could use 5 wires per buss, or 4 with
>> >> grounds between, or something. Or use a 16 wide ribbon with 4 per.
>> >> Fortunately, there will be predictable air flow.
>> >>
>> >> Why play chess or do crosswords when you can design electronics?
>> >
>> > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
>> Some of it is work. But designing is fun.
>
> A co-worker from long ago would say the difference between work and play depended on which way the money flowed.

That's just someone's definition. Electronic design is fun, but the
followups - parts selection, documentation, testing, compliance - can
get tedious.

On Fri, 31 Mar 2023 16:25:37 -0700 (PDT), Sid 03 <sidwelle@gmail.com>
wrote:

>On Friday, March 31, 2023 at 5:19:31?PM UTC-5, Ralph Mowery wrote:
>> In article <n5ee2i1sfuok1a8sh...@4ax.com>,
>> jla...@highlandSNIPMEtechnology.com says...
>> >
>> > >> Why play chess or do crosswords when you can design electronics?
>> > >
>> > > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
>> >
>> > Some of it is work. But designing is fun.
>> >
>> >
>> >
>> Where I worked about 3/4 of the time was fun. The other 1/4 of the time
>> was work because I did not enjoy that part. If I could have paid the
>> bills I would have done the 3/4 time for nothing. Is it work or fun for
>> the people doing sports ? Even the chess can be a job or for fun or
>> both. Golf is probably the best paying job for fun. Not much physical
>> abuse to the body compaired to other sports.
>
>Yes, "Yes wire sizes for amperage can vary all over the place." is exactly what I found.
>I used the calculator that was linked and it shows that AWG 40 was suitable for 1 amp at 1 foot long ?

My reference says that the fusing current of #40 is 1.77 amps. So 1
amp would be mighty hot.

The ITT "Reference Data for Radio Engineers" is a good book to have
around. Old copies should be cheap.

On Fri, 31 Mar 2023 17:15:00 -0700 (PDT), John May <sunaeco@gmail.com>
wrote:

>On Saturday, April 1, 2023 at 12:25:42?AM UTC+1, Sid 03 wrote:
>> On Friday, March 31, 2023 at 5:19:31?PM UTC-5, Ralph Mowery wrote:
>> > In article <n5ee2i1sfuok1a8sh...@4ax.com>,
>> > jla...@highlandSNIPMEtechnology.com says...
>> > >
>> > > >> Why play chess or do crosswords when you can design electronics?
>> > > >
>> > > > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
>> > >
>> > > Some of it is work. But designing is fun.
>> > >
>> > >
>> > >
>> > Where I worked about 3/4 of the time was fun. The other 1/4 of the time
>> > was work because I did not enjoy that part. If I could have paid the
>> > bills I would have done the 3/4 time for nothing. Is it work or fun for
>> > the people doing sports ? Even the chess can be a job or for fun or
>> > both. Golf is probably the best paying job for fun. Not much physical
>> > abuse to the body compaired to other sports.
>> Yes, "Yes wire sizes for amperage can vary all over the place." is exactly what I found.
>> I used the calculator that was linked and it shows that AWG 40 was suitable for 1 amp at 1 foot long ?
>> I thought the rule etched it stone was the #10 was used for 30 Amp, #12 for 20 Amps, and #14 for Amps, where does this standard come from ?
>> And why can't I find a chart that follows the AWG down into the 2? AWG gauges ?
>> Years ago I had a shop class where the instructor stated that 18 AWG was good for 3 amps and another instructor stated that 18 AWG was good for 5 amps maximum.
>> I just thought it would be simple to find a chart that definitively shows the small AWG(s)
>>
>> Thanks
>
>There's no definitive answer, unless you have to follow recognized standard. A rule of thumb for copper wiring fusing current is 80*d^1.5 (d = diameter in mm) and then to design with a safety factor (say 1/20th of that).

Yikes. (1/20)^2 is 1/400. Seems pessimistic.

On Friday, March 31, 2023 at 7:19:45 PM UTC-5, Dean Hoffman wrote:
> On Friday, March 31, 2023 at 6:25:42 PM UTC-5, Sid 03 wrote:
> > On Friday, March 31, 2023 at 5:19:31 PM UTC-5, Ralph Mowery wrote:
> > > In article <n5ee2i1sfuok1a8sh...@4ax.com>,
> > > jla...@highlandSNIPMEtechnology.com says...
> > > >
> > > > >> Why play chess or do crosswords when you can design electronics?
> > > > >
> > > > > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
> > > >
> > > > Some of it is work. But designing is fun.
> > > >
> > > >
> > > >
> > > Where I worked about 3/4 of the time was fun. The other 1/4 of the time
> > > was work because I did not enjoy that part. If I could have paid the
> > > bills I would have done the 3/4 time for nothing. Is it work or fun for
> > > the people doing sports ? Even the chess can be a job or for fun or
> > > both. Golf is probably the best paying job for fun. Not much physical
> > > abuse to the body compaired to other sports.
> > Yes, "Yes wire sizes for amperage can vary all over the place." is exactly what I found.
> > I used the calculator that was linked and it shows that AWG 40 was suitable for 1 amp at 1 foot long ?
> > I thought the rule etched it stone was the #10 was used for 30 Amp, #12 for 20 Amps, and #14 for Amps, where does this standard come from ?
> > And why can't I find a chart that follows the AWG down into the 2? AWG gauges ?
> > Years ago I had a shop class where the instructor stated that 18 AWG was good for 3 amps and another instructor stated that 18 AWG was good for 5 amps maximum.
> > I just thought it would be simple to find a chart that definitively shows the small AWG(s)
> >
> > Thanks
> I searched for 24 awg ampacity. Several tables for small wire gauge showed up. \
> <https://www.powerstream.com/Wire_Size.htm>. Is this of any use?

Dean, I have seen that table before. it shows two numbers described as "Maximum amps for chassis wiring" and "Maximum amps for
power transmission". Not really sure what these definitions mean other than the literal interpretation ?

For 14 AWG the chart shows 8.282 Amps and 32 Amps respectively ?

Thanks
Sid.

In article <ab29a9c2-9701-420d-bdc1-3ab6a1083a4bn@googlegroups.com>,
sidwelle@gmail.com says...
>
> Dean, I have seen that table before. it shows two numbers described as "Maximum amps for chassis wiring" and "Maximum amps for
> power transmission". Not really sure what these definitions mean other than the literal interpretation ?
>
> For 14 AWG the chart shows 8.282 Amps and 32 Amps respectively ?
>
>
>

Short answer is chassis wiring is in an enclosed box. the other is in
open air.

On Saturday, April 1, 2023 at 4:14:03 AM UTC+1, Sid 03 wrote:
> On Friday, March 31, 2023 at 7:19:45 PM UTC-5, Dean Hoffman wrote:
> > On Friday, March 31, 2023 at 6:25:42 PM UTC-5, Sid 03 wrote:
> > > On Friday, March 31, 2023 at 5:19:31 PM UTC-5, Ralph Mowery wrote:
> > > > In article <n5ee2i1sfuok1a8sh...@4ax.com>,
> > > > jla...@highlandSNIPMEtechnology.com says...
> > > > >
> > > > > >> Why play chess or do crosswords when you can design electronics?
> > > > > >
> > > > > > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
> > > > >
> > > > > Some of it is work. But designing is fun.
> > > > >
> > > > >
> > > > >
> > > > Where I worked about 3/4 of the time was fun. The other 1/4 of the time
> > > > was work because I did not enjoy that part. If I could have paid the
> > > > bills I would have done the 3/4 time for nothing. Is it work or fun for
> > > > the people doing sports ? Even the chess can be a job or for fun or
> > > > both. Golf is probably the best paying job for fun. Not much physical
> > > > abuse to the body compaired to other sports.
> > > Yes, "Yes wire sizes for amperage can vary all over the place." is exactly what I found.
> > > I used the calculator that was linked and it shows that AWG 40 was suitable for 1 amp at 1 foot long ?
> > > I thought the rule etched it stone was the #10 was used for 30 Amp, #12 for 20 Amps, and #14 for Amps, where does this standard come from ?
> > > And why can't I find a chart that follows the AWG down into the 2? AWG gauges ?
> > > Years ago I had a shop class where the instructor stated that 18 AWG was good for 3 amps and another instructor stated that 18 AWG was good for 5 amps maximum.
> > > I just thought it would be simple to find a chart that definitively shows the small AWG(s)
> > >
> > > Thanks
> > I searched for 24 awg ampacity. Several tables for small wire gauge showed up. \
> > <https://www.powerstream.com/Wire_Size.htm>. Is this of any use?
> Dean, I have seen that table before. it shows two numbers described as "Maximum amps for chassis wiring" and "Maximum amps for
> power transmission". Not really sure what these definitions mean other than the literal interpretation ?
>
> For 14 AWG the chart shows 8.282 Amps and 32 Amps respectively ?
>
> Thanks
> Sid.
For power transmission the chart assumes the wire will be routed in a bundle with other power wires, thus the ability to dissipate heat will be reduced, so the current capacity will be lower.

On Saturday, April 1, 2023 at 3:31:28 AM UTC+1, John Larkin wrote:
> On Fri, 31 Mar 2023 17:15:00 -0700 (PDT), John May <sun...@gmail.com>
> wrote:
>
> >On Saturday, April 1, 2023 at 12:25:42?AM UTC+1, Sid 03 wrote:
> >> On Friday, March 31, 2023 at 5:19:31?PM UTC-5, Ralph Mowery wrote:
> >> > In article <n5ee2i1sfuok1a8sh...@4ax.com>,
> >> > jla...@highlandSNIPMEtechnology.com says...
> >> > >
> >> > > >> Why play chess or do crosswords when you can design electronics?
> >> > > >
> >> > > > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
> >> > >
> >> > > Some of it is work. But designing is fun.
> >> > >
> >> > >
> >> > >
> >> > Where I worked about 3/4 of the time was fun. The other 1/4 of the time
> >> > was work because I did not enjoy that part. If I could have paid the
> >> > bills I would have done the 3/4 time for nothing. Is it work or fun for
> >> > the people doing sports ? Even the chess can be a job or for fun or
> >> > both. Golf is probably the best paying job for fun. Not much physical
> >> > abuse to the body compaired to other sports.
> >> Yes, "Yes wire sizes for amperage can vary all over the place." is exactly what I found.
> >> I used the calculator that was linked and it shows that AWG 40 was suitable for 1 amp at 1 foot long ?
> >> I thought the rule etched it stone was the #10 was used for 30 Amp, #12 for 20 Amps, and #14 for Amps, where does this standard come from ?
> >> And why can't I find a chart that follows the AWG down into the 2? AWG gauges ?
> >> Years ago I had a shop class where the instructor stated that 18 AWG was good for 3 amps and another instructor stated that 18 AWG was good for 5 amps maximum.
> >> I just thought it would be simple to find a chart that definitively shows the small AWG(s)
> >>
> >> Thanks
> >
> >There's no definitive answer, unless you have to follow recognized standard. A rule of thumb for copper wiring fusing current is 80*d^1.5 (d = diameter in mm) and then to design with a safety factor (say 1/20th of that).
> Yikes. (1/20)^2 is 1/400. Seems pessimistic.

Not at all. That is the figure you would use if you were to use the wire to construct a wound component. For point to point wiring you could increase the capacity by about a factor of four. Preece and Onderdonk’s equations are much more useful than these capacity charts.

On Friday, March 31, 2023 at 10:14:03 PM UTC-5, Sid 03 wrote:
> On Friday, March 31, 2023 at 7:19:45 PM UTC-5, Dean Hoffman wrote:
> > On Friday, March 31, 2023 at 6:25:42 PM UTC-5, Sid 03 wrote:
> > > On Friday, March 31, 2023 at 5:19:31 PM UTC-5, Ralph Mowery wrote:
> > > > In article <n5ee2i1sfuok1a8sh...@4ax.com>,
> > > > jla...@highlandSNIPMEtechnology.com says...
> > > > >
> > > > > >> Why play chess or do crosswords when you can design electronics?
> > > > > >
> > > > > > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
> > > > >
> > > > > Some of it is work. But designing is fun.
> > > > >
> > > > >
> > > > >
> > > > Where I worked about 3/4 of the time was fun. The other 1/4 of the time
> > > > was work because I did not enjoy that part. If I could have paid the
> > > > bills I would have done the 3/4 time for nothing. Is it work or fun for
> > > > the people doing sports ? Even the chess can be a job or for fun or
> > > > both. Golf is probably the best paying job for fun. Not much physical
> > > > abuse to the body compaired to other sports.
> > > Yes, "Yes wire sizes for amperage can vary all over the place." is exactly what I found.
> > > I used the calculator that was linked and it shows that AWG 40 was suitable for 1 amp at 1 foot long ?
> > > I thought the rule etched it stone was the #10 was used for 30 Amp, #12 for 20 Amps, and #14 for Amps, where does this standard come from ?
> > > And why can't I find a chart that follows the AWG down into the 2? AWG gauges ?
> > > Years ago I had a shop class where the instructor stated that 18 AWG was good for 3 amps and another instructor stated that 18 AWG was good for 5 amps maximum.
> > > I just thought it would be simple to find a chart that definitively shows the small AWG(s)
> > >
> > > Thanks
> > I searched for 24 awg ampacity. Several tables for small wire gauge showed up. \
> > <https://www.powerstream.com/Wire_Size.htm>. Is this of any use?
> Dean, I have seen that table before. it shows two numbers described as "Maximum amps for chassis wiring" and "Maximum amps for
> power transmission". Not really sure what these definitions mean other than the literal interpretation ?
>
> For 14 AWG the chart shows 8.282 Amps and 32 Amps respectively ?
>
> Thanks
> Sid.

I don't know. Others here probably learned more about electricity their first morning in college than I learned from experience. I know enough of the electrical code to do my job and make it to retirement age. It would've been bad for business if I wired something that killed a farmer. News and rumors travel fast in rural areas.

Bad news travels at the speed of light; good news travels like molasses.
Tracy Morgan
Read more at https://www.brainyquote.com/search_results?q=news&pg=2

On 3/31/2023 7:25 PM, Sid 03 wrote:
[...]
> I thought the rule etched it stone was the #10 was used for 30 Amp, #12 for 20 Amps, and #14 for Amps, where does this standard come from ?
[...]

Those numbers are from the NEC (National Electric Code) for residential
(& commercial?) wiring.

On Sat, 1 Apr 2023 01:22:42 -0700 (PDT), John May <sunaeco@gmail.com>
wrote:

>On Saturday, April 1, 2023 at 3:31:28?AM UTC+1, John Larkin wrote:
>> On Fri, 31 Mar 2023 17:15:00 -0700 (PDT), John May <sun...@gmail.com>
>> wrote:
>>
>> >On Saturday, April 1, 2023 at 12:25:42?AM UTC+1, Sid 03 wrote:
>> >> On Friday, March 31, 2023 at 5:19:31?PM UTC-5, Ralph Mowery wrote:
>> >> > In article <n5ee2i1sfuok1a8sh...@4ax.com>,
>> >> > jla...@highlandSNIPMEtechnology.com says...
>> >> > >
>> >> > > >> Why play chess or do crosswords when you can design electronics?
>> >> > > >
>> >> > > > How 'bout this? People usually don't get paid for doing crosswords or playing chess. That makes it fun. People get paid tons and tons of money to design electronics so that makes it work.
>> >> > >
>> >> > > Some of it is work. But designing is fun.
>> >> > >
>> >> > >
>> >> > >
>> >> > Where I worked about 3/4 of the time was fun. The other 1/4 of the time
>> >> > was work because I did not enjoy that part. If I could have paid the
>> >> > bills I would have done the 3/4 time for nothing. Is it work or fun for
>> >> > the people doing sports ? Even the chess can be a job or for fun or
>> >> > both. Golf is probably the best paying job for fun. Not much physical
>> >> > abuse to the body compaired to other sports.
>> >> Yes, "Yes wire sizes for amperage can vary all over the place." is exactly what I found.
>> >> I used the calculator that was linked and it shows that AWG 40 was suitable for 1 amp at 1 foot long ?
>> >> I thought the rule etched it stone was the #10 was used for 30 Amp, #12 for 20 Amps, and #14 for Amps, where does this standard come from ?
>> >> And why can't I find a chart that follows the AWG down into the 2? AWG gauges ?
>> >> Years ago I had a shop class where the instructor stated that 18 AWG was good for 3 amps and another instructor stated that 18 AWG was good for 5 amps maximum.
>> >> I just thought it would be simple to find a chart that definitively shows the small AWG(s)
>> >>
>> >> Thanks
>> >
>> >There's no definitive answer, unless you have to follow recognized standard. A rule of thumb for copper wiring fusing current is 80*d^1.5 (d = diameter in mm) and then to design with a safety factor (say 1/20th of that).
>> Yikes. (1/20)^2 is 1/400. Seems pessimistic.
>
>Not at all. That is the figure you would use if you were to use the wire to construct a wound component. For point to point wiring you could increase the capacity by about a factor of four. Preece and Onderdonk’s equations are much more useful than these capacity charts.

#28 coppr wire has a fusing current of 14.4 amps. It barely gets warm
in still free air at 1.5 amp, which is 10:1 current, 100:1 heating.