On 9/8/2018 6:19 PM, Andy wrote:> On Friday, September 7, 2018 at 2:21:38 PM UTC-5, Tom Biasi wrote: >> On 9/7/2018 1:13 PM, Andy wrote: >>> On Friday, September 7, 2018 at 9:15:11 AM UTC-5, jf...@my-deja.com wrote: >>>> On Thursday, September 6, 2018 at 7:05:57 AM UTC-7, Andy wrote: >>>>> I looked at an ampacity table but it was confusing. >>>>> >>>>> Would a 4 ft. length of 18 AWG wire be ok for a 10 amp load.? (Circular saw) >>>>> >>>>> Thanks, >>>>> Andy >>>> >>>> This is a false economy. You can get a 6 ft 16 gauge extension cord, rated for 13A, from Lowe's for US$1.78 plus tax and interest on your credit card. My opinion is that for this small amount of money, it is not worth risking your life by being a cheapskate. >>> >>> Not being a cheapskate. Just frugal. >>> >> Using 18 gauge wire on a circular saw is not recommended. It should be >> on a 15 amp circuit at least. That would mean 14 gauge wire if hard >> wired. If you are using an extension cord I would not go smaller than 16 ga. > > My microwave went out. I salvaged the cord. It was at least 14 gauge. > > Andy >Are you going to make an extension cord out of it?
Ampacity of 18 gauge wire
Started by ●September 6, 2018
Reply by ●September 8, 20182018-09-08
Reply by ●September 9, 20182018-09-09
On Thu, 06 Sep 2018 13:58:43 -0500, amdx wrote:> Adding all those together and using your 10 amp number, > 0.051 + 0.6385 + 0.25 = 0.9395 ohms, you're losing about 1v per amp. > I hope that gives you some insight.Just wondering if using too small a fuse can choke the current? Even though they're only an inch long? Say I am running my portable welder which draws 12A and is fitted with a 13A fuse, via an extension lead which is fitted with only a 10A fuse, will the smaller fuse choke the current the welder is trying to draw? IIRC, the smaller fuse would probably not blow for many minutes, so one could be totally unaware that it's unable to supply enough current for the welder and giving rise to poor quality welds.
Reply by ●September 9, 20182018-09-09
On Sun, 9 Sep 2018 10:36:49 -0000 (UTC), Chris <cbx@noreply.com> wrote:>On Thu, 06 Sep 2018 13:58:43 -0500, amdx wrote: > >> Adding all those together and using your 10 amp number, >> 0.051 + 0.6385 + 0.25 = 0.9395 ohms, you're losing about 1v per amp. >> I hope that gives you some insight. > >Just wondering if using too small a fuse can choke the current? Even >though they're only an inch long? >Say I am running my portable welder which draws 12A and is fitted with a >13A fuse, via an extension lead which is fitted with only a 10A fuse, >will the smaller fuse choke the current the welder is trying to draw? >IIRC, the smaller fuse would probably not blow for many minutes, so one >could be totally unaware that it's unable to supply enough current for >the welder and giving rise to poor quality welds.Fuses have relatively low resistance so if the amp and volt rating are correct the small amount of resistance a fuse adds will be negligible. A long wire run, with too small a gauge would probably have a greater effect.
Reply by ●September 10, 20182018-09-10
On Saturday, September 8, 2018 at 7:37:12 PM UTC-5, Tom Biasi wrote:> On 9/8/2018 6:19 PM, Andy wrote: > > On Friday, September 7, 2018 at 2:21:38 PM UTC-5, Tom Biasi wrote: > >> On 9/7/2018 1:13 PM, Andy wrote: > >>> On Friday, September 7, 2018 at 9:15:11 AM UTC-5, jf...@my-deja.com wrote: > >>>> On Thursday, September 6, 2018 at 7:05:57 AM UTC-7, Andy wrote: > >>>>> I looked at an ampacity table but it was confusing. > >>>>> > >>>>> Would a 4 ft. length of 18 AWG wire be ok for a 10 amp load.? (Circular saw) > >>>>> > >>>>> Thanks, > >>>>> Andy > >>>> > >>>> This is a false economy. You can get a 6 ft 16 gauge extension cord, rated for 13A, from Lowe's for US$1.78 plus tax and interest on your credit card. My opinion is that for this small amount of money, it is not worth risking your life by being a cheapskate. > >>> > >>> Not being a cheapskate. Just frugal. > >>> > >> Using 18 gauge wire on a circular saw is not recommended. It should be > >> on a 15 amp circuit at least. That would mean 14 gauge wire if hard > >> wired. If you are using an extension cord I would not go smaller than 16 ga. > > > > My microwave went out. I salvaged the cord. It was at least 14 gauge. > > > > Andy > > > Are you going to make an extension cord out of it?Yes, I did.
