EDAboard.com | EDAboard.de | EDAboard.co.uk | WTWH Media

Current carrying capacity

Ask a question - edaboard.com

elektroda.net NewsGroups Forum Index - Electronics AUS - Current carrying capacity

FMurtz
Guest

Sun Dec 02, 2018 2:45 pm   



No, it is *not* the same at different voltages, not by a long chalk.

The voltage drop for a given current at a given length *is* the same.
Neglecting the issue of waste heat, this means that the voltage drops
to zero at a much shorter distance with a lower voltage.

Example : 60A through 65mm^2, you are down to zero before 400m at 12V
(ie 100% wasted as heat in the cable), at 220kv, you are less than 3%
down at 200 km with the same cable.

Quote:
the current will be higher at 12 volt but still much much less than
20 amps


2.5mm^2 is unacceptable if someone is paying you to do the job.... The
loss exceeds the 3% maximum allowable loss. But it is unlikely to be
hazardous.
--
Cheers,
Paul Saccani
Perth, Western Australia.

FMurtz
Guest

Sun Dec 02, 2018 2:45 pm   



FMurtz wrote:
Quote:

No, it is *not* the same at different voltages, not by a long chalk.

The voltage drop for a given current at a given length *is* the same.
Neglecting the issue of waste heat, this means that the voltage drops
to zero at a much shorter distance with a lower voltage.

Example : 60A through 65mm^2, you are down to zero before 400m at 12V
(ie 100% wasted as heat in the cable), at 220kv, you are less than 3%
down at 200 km with the same cable.

the current will be higher at 12 volt but still much much less than
20 amps

2.5mm^2 is unacceptable if someone is paying you to do the job.... The
loss exceeds the 3% maximum allowable loss.   But it is unlikely to be
hazardous.
OOps bits missing


elektroda.net NewsGroups Forum Index - Electronics AUS - Current carrying capacity

Ask a question - edaboard.com

Arabic version Bulgarian version Catalan version Czech version Danish version German version Greek version English version Spanish version Finnish version French version Hindi version Croatian version Indonesian version Italian version Hebrew version Japanese version Korean version Lithuanian version Latvian version Dutch version Norwegian version Polish version Portuguese version Romanian version Russian version Slovak version Slovenian version Serbian version Swedish version Tagalog version Ukrainian version Vietnamese version Chinese version Turkish version
EDAboard.com map