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How to Upgrade Home Electrical Wiring

   
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Upgrading Old Home Wiring and Knob and Tube Wiring: Installing New Electrical Wiring in an Older Home.


Upgrading Old Home Wiring and Knob and Tube Wiring

Electrical Question: I have just purchased an old house (built in 1928). I know there is old knob and tube wire in the house and plan to replace it.

  • My plan is to have a certified electrician install a 200Amp service so that I can slowly (while learning) move my rooms and connections from the old 100amp service that is in place now, eventually completely removing the old service and the old wire mis-mash that currently exists. I have seen Knob and Tube¬† cloth wrapped, intermingled with some updated runs for specific appliances (like the stove, other major appliances and some specific computer outlets).
  • I have gotten quotes to have the entire thing professionally done and it is way out of my price range, plus all the quotes state that the quote does not include repair to walls and ceilings that will damaged as new runs are put in place – we will need to absorb that as well. This has led me to my current plan of having pro’s install service and I will try and do the run’s while maintaining as much of my antique walls and ceiling as possible. Which leads to my question – I have a very open attic, as well as a basement.
  • I am wondering if I cannot have all the upstairs fed from the attic (and a single run from the basement to the attic) and all of the first floor serviced from the basement. Would I need a breaker box in both locations? One up in the attic and one in the basement & should I have the pros set this up at the same time – so that I can then make the runs to the individual rooms from the professionally installed service?
    And finally to help save my walls and ceiling (all which are Plaster and lath – with some having an added layer of sheet rock on top – which I have learned is impossible to navigate with original means (stud finders, magnetic cable runners etc.) would it be a horrible or impossible idea to route out a cable path in the lath and plaster and sheet-rock with a router deep enough to house the cable, but not deep enough to penetrate the lath and then just re-plaster over the cable – encasing it in the plaster in the walls?

This electrical wiring question came from: David, from Macomb, Illinois.

Dave’s Reply:
Thanks for your electrical wiring question David.

Installing New Electrical Wiring in an Older Home

Skill Level: Intermediate to Advanced
Tools Required: Electricians Pouch of Hand Tools for Rough-In Wiring, Electric Drill and Auger Bits,  Extension Cords, and Ladders.
Safety: All personal safety measures must be taken when performing remodel projects where you may come into contact with hazardous materials and environmental contaminants  such as fiberglass insulation, vermiculite and asbestos, molds or mildew, as well as dust.
Estimated Time: Depends on the extent of the project, the type of wall coverings and structural construction and available access to the project area.
Precaution: Any existing wiring in the immediate area that may interfere with the installation should be identified and turned OFF and Tagged.
Notice: Installing additional electrical wiring or upgrading existing electrical circuits and wiring should always be done according to local and national electrical codes with a permit and be inspected.

Common Methods for Upgrading Electrical Wiring

  • Planning the Electrical Wiring
    There are several methods of installing home electrical wiring that can me used, however each method must be done according to code and with a permit and inspections. If there are problems concerning access then it is possible to install surface conduit to safely enclose the new electrical wiring.
  • Upgrading Old Wiring
    When upgrading the electrical wiring of an older home the dwelling space or square footage should be treated as if it were a new home where all of the current electrical codes would apply. The project could be done a little at a time, area by area, but it would be best to begin by upgrading the electrical service panel.
  • Dealing with Wall Coverings
    When dealing with the wall coverings to obtain access to install the new electrical wiring you must consider the time and labor costs to save the existing walls and fish in the wire verses having a crew of laborers remove the existing sheet rock or lath and plaster.
  • Opening the Walls Up
    Having the walls open enables you or the contractors to have full access to remove all the old electrical wiring and boxes and start fresh with new materials located conveniently and according to code. You will also have the opportunity to inspect the plumbing and any other utilities and the structure and make changes or upgrade as needed.

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Complete Guide to Home Electrical Wiring
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Handyman, Handywomen, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electrical Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
Troubleshooting and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
Electrical Codes for Home Electrical Wiring
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