Why -48V?

H

haylin1217

New Member

• Jun 4, 2009

• #1

None English deleted.

Moderator.

 

Last edited by a moderator: Jun 4, 2009

bigkim100

Banned

• Jun 4, 2009

• #2

You really should not attempt to type when you are having a seizure...nobody can understand you.

 

S

schmitt trigger

Well-Known Member

Most Helpful Member

• Jun 4, 2009

• #3

?
How do you expect to receive an answer form a question that cannot be understood?

 

Last edited: Jun 4, 2009

S

SPDCHK

Member

• Jun 4, 2009

• #4

haylin1217 said:

None English deleted.

Moderator...

Click to expand...

Speaka da English?

 

Last edited by a moderator: Jun 4, 2009

S

smanches

New Member

• Jun 4, 2009

• #5

**broken link removed**

Look at Note #4 at the bottom of the page.

BTW, I think he's speaking Tagalog (Philipino)

 

Last edited: Jun 4, 2009

Externet

Well-Known Member

• Jun 4, 2009

• #6

If I get what you are asking, telephone lines use 48 V because is in the limit considered safe for handling (low voltage) and negative because that way reduces electrolytic erosion of copper wires often wet when underground or rains.