Re: How much current safe for 30m extension?

From: Peter A Forbes (diesel_at_easynet.co.uk)
Date: 02/12/05 

Date: Sat, 12 Feb 2005 19:08:13 +0000 (UTC)

On Sat, 12 Feb 2005 10:51:00 -0800, "Watson A.Name - \"Watt Sun, the Dark
Remover\"" <NOSPAM@dslextreme.com> wrote:

>
>"Bob Eager" <rde42@spamcop.net> wrote in message
>news:176uZD2KcidF-pn2-pgQf8dbMMKeL@rikki.tavi.co.uk...
>> On Sat, 12 Feb 2005 12:46:19 UTC, Ian Stirling
><root@mauve.demon.co.uk>
>> wrote:
>>
>> > Or for 60m, 8.4*10^-1 ohms, or .84 ohms.
>>
>> Plus the resistance on the two connections. Not sure whether the earth
>> fault loop impedance is still OK...
>
>Yeah, true. You 220VAC and 240VAC guys think you got it bad, we have
>four times as much of a problem here in 120VAC land. ;-)
>
>Those poor souls that put a hundred feet or so of 18GA (about 1mm sq)
>extension cord on their weed wackers soon find that not only does it run
>slow, but the motor overheats. So we have extension cords that are 16
>or 14 gauge, and can handle the extra current. But people are too cheap
>to pay double for the heavy duty extension cord, so they end up eating
>their money up in burned out motors.
>
>And then when they get tired of doing that, they go out and buy a weed
>wacker with the gas engine. This is on the end of a long pole, so the
>engine is right up next to their face, so they go deaf from all the
>engine noise. And they put the weed wacker in the garage, where the gas
>from the tank runs out and catches on fire!
>
>
>> --
>> Bob Eager
>>
>

Why use anything as small as 1mm sq cable???

For 30metres I'd want to see 2.5mm sq at least, if not 4mm sq.

If not for the volt drop or lack of, for the mechanical strength and resistance
to damage.

Peter 

--
Peter & Rita Forbes
Email: diesel@easynet.co.uk
Web: http://www.oldengine.org/members/diesel

Relevant Pages

  • Re: How much current safe for 30m extension?
    ... ask an electrician to construct you an extra heavy duty extension cable, ... >>extension cord on their weed wackers soon find that not only does it run ... >>wacker with the gas engine. ...
    (sci.electronics.equipment)
  • Re: How much current safe for 30m extension?
    ... ask an electrician to construct you an extra heavy duty extension cable, ... >>extension cord on their weed wackers soon find that not only does it run ... >>wacker with the gas engine. ...
    (sci.electronics.components)
  • Re: How much current safe for 30m extension?
    ... extension cord on their weed wackers soon find that not only does it run ... wacker with the gas engine. ...
    (sci.electronics.equipment)
  • Re: How much current safe for 30m extension?
    ... extension cord on their weed wackers soon find that not only does it run ... wacker with the gas engine. ...
    (sci.electronics.components)
  • Re: How much current safe for 30m extension?
    ... >extension cord on their weed wackers soon find that not only does it run ... >wacker with the gas engine. ... If not for the volt drop or lack of, for the mechanical strength and resistance ...
    (sci.electronics.components)