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ByDave Rongey © Ask the Electrician 2017 Author, Licensed Electrical Contractor
» Home Electrical Wiring Guide Book

Telephone System Grounding

How to Provide an Earth Grounding for a Telephone Communications System: Installing a Ground Clamp for a Telephone.

Telephone System Grounding for an Existing Home
Electrical Question: Outside of my parents house, the grounding clamp from the telephone box to the peg in the dirt came loose.

How can I help him?

This electrical question came from: Sean, a Student from New York, New York.

Dave’s Reply:
Thanks for your electrical question Sean.

Grounding Telephone Communications

Application: Wiring a Telephone.
Skill Level: Beginner to Intermediate – Best performed by a Certified Electrician or Telephone Technician.
Tools Required: Basic Straight Slot and Philips Screw Drivers, wire strippers for 20 to 24 gauge wire.
Estimated Time: Depends on personal level experience and ability to work with tools and small phone wires.
Precaution: If installing or relocating additional telephone wiring, or replacing a phone jack the main phone cable or the Test Jack should be disconnected before working with the wiring.
Notice: Installing additional telephone cable wiring and replacement parts should be done using approved phone cable and phone jacks that are approved and compatible with the local telephone company system specifications.

Installing a Ground Clamp for a Telephone

  1. With an existing home it may be best to install a new ground clamp onto the ground rod that is sized to allow the ground wire from the telephone system box.
    • Adding the telephone system ground wire to the home electrical system ground wire clamp is not advisable.

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2 Responses to “Telephone System Grounding”
  1. Eric says:

    I have a wire coming from my outside phone box that goes inside the house and plugs into an electrical outlet. What is it and can I get rid of it if I am fully cable now?

    • Dave Rongey says:

      Hi Eric,
      Identifying an Outside Phone Box Wire

      Here are two types of wires that may be connected to the phone box and a power outlet:
      The wire may be a single conductor that is used to ground the phone system.
      If the phone system also provides an internet connection then the wire may provide power to a router.

      NOTE: It would be best to contact the phone service provider for more clarification before disconnecting any service wiring.

      I hope this helps,
      Dave

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