The only problem that can happen is you would not have a ground for your electrical in the house if the pipe is cut between the clamp and the copper going into the ground outside. You shouldn't get shocked, if that is what you're worried about.
Purchase a ground rod from an electrical supply. Drive it into the ground just outside where your service is located. Install a ground cable from the neutral bar in the fuse box to the ground rod and clamp both ends. Voila, you have done it!
A ferrite clamp is needed and may not be supplied with your VoIP phone.
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An extension clamp is a type of clamp that is used to grip, support, and hold mechanical parts together. It may also be used to compress industrial parts.
A cold water pipe is usually a ground. Nowadays with plastic pipe you can't be sure. If the pipe out of the foundation is copper chances are it is good. You can check it with a meter. You can also get an electrical ground rod and install it. It is just a 10' spike that you hammer into the ground and clamp a wire to. It will also give you a good ground. You may already have one at your home. Check by the service entrance for electricity and phone.
All electrical distribution systems require a system earth ground for personnel safety. The ground for your home electrical system is likely a grounding rod, a 10 ft. copper clad steel rod driven into the ground and then bonded with a brass clamp and large bare ground wire to your panel. This provides a path to ground to dissipate errant current which can occur due to a circuit which "shorts out." Better it goes to ground than into you!
An extension clamp is usually used to hold or pick up things. The extension clamps are commonly used in a laboratory setting.
Simply "clamp-on" the clamp of the amp meter to any electrical conductor supplying the equipment that you wish to check while it is in operation. It is better to use your clamp-on with each individual conductor one at a time.
The ground rod has to be driven to within two inches from the end. This will give just enough room to apply the ground rod clamp. The new rods are stamped with the length on them so you can not cut off the rod that will not go into the ground. Electrical inspectors look for the length identification marks to make sure the full length of the rod is in the ground.
plumbing line floor joist electric panel ground Electrical wire sheathing should not project more than about one inch into any device that uses a cable clamp to secure the cable to the device.