Current on Phone Line?

Discussion in 'Electrical Forum discussion & Blog' started by Ramjet, Apr 8, 2010.

  1. Ramjet

    Ramjet New Member

    Messages:
    2
    Location:
    Virginia
    I'm a homeowner with limited electrical skills, but I have added phone lines in my homes in the past. In the house I own now, I get a very strong shock from one of the four wires in my telephone line. The current is present in the line before it enters the house and is constant (i.e., not present just during ringing).

    The line runs underground from a telephone utility box near the street -- is it possible it's crossing a buried electrical wire and picking up current there? Is there any way this could be considered normal?

    Any advice would be appreciated.
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,019
    Location:
    New England
    Phone lines have voltage on them all the time, and when ringing, there's more. If you've ever had the chance to look at a telephone company's office, you'd see huge banks of batteries.
  3. Ramjet

    Ramjet New Member

    Messages:
    2
    Location:
    Virginia
    Thanks for the reply.

    I understand about the constant voltage. In researching this question before posting, I found a number of people who were shocked by a phone line because they handled it when the phone happened to ring and the voltage was higher, but didn't have any problem handling the line when the phone was in its normal state. My point was that my problem line provides a strong shock at any time (I hate to think what it would be like while ringing).
  4. Lightwave

    Lightwave New Member

    Messages:
    98
    Location:
    Vancouver, BC
    It's not normal and could be a fire hazard. Call the phone company.
  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,019
    Location:
    New England
    DC voltage, unless from high voltage, doesn't usually get noticed. If there is high a/c voltage there, you'd notice, and that isn't normally there unless it is sending the ring signal. High current in either a/c or dc can be dangerous.
  6. drick

    drick In the Trades

    Messages:
    392
    Phone line voltage is approx 48 volts. Ring voltage is approximately 96 volts. It sounds like you have more than 48 volts so I'd make a call to the phone company and get it checked out.

    -rick
Similar Threads: Current Phone
Forum Title Date
Electrical Forum discussion & Blog measuring blower motor current Sep 10, 2013
Electrical Forum discussion & Blog Dryer current-off alarm Jul 24, 2011
Electrical Forum discussion & Blog Stray current? Apr 2, 2011
Electrical Forum discussion & Blog Suggestions for becoming an Electrician? Would like advice from current electricians. Mar 31, 2010
Electrical Forum discussion & Blog Does 12-2 copper carry same current as 10-2 aluminum Jun 11, 2008

Share This Page