Knob-and-Tube Wiring Replacement · Salt Lake City, UT
Knob-and-Tube Wiring Replacement in Salt Lake City, UT
Knob-and-tube replacement removes early wiring (about 1880s to 1940s) that runs on ceramic knobs and tubes without a ground, and replaces it with modern grounded cable. It is commonly done before insulating, during renovations, or when an insurer requires it.
- Call now to check electrician availability in your area
- Independent, licensed electricians
- Serving The Avenues, Sugar House, Liberty Wells and more
Why knob-and-tube wiring replacement comes up in Salt Lake City
The Avenues, Federal Heights, Liberty Wells and the older streets of Sugar House hold many of Salt Lake City's homes from the 1890s to the 1930s, and knob-and-tube wiring still runs behind plaster and through attics in a good number of them. Brick construction is common, so new cable is routed through interior walls, basements and attics rather than exterior walls. Many owners combine rewiring with a seismic retrofit, since the Wasatch Fault makes earthquake upgrades a common project, and both involve opening the same spaces.
The Avenues is a historic district with design review for exterior changes. Permits come from the city's Building Services division, Utah licenses electricians through DOPL, and Rocky Mountain Power coordinates service work.
- Pre-purchase inspections of older Avenues and Sugar House homes often look for ungrounded circuits, knob-and-tube and unpermitted basement work.
- The Avenues, Federal Heights and Liberty Wells hold many of Salt Lake City's homes from the late 1800s to the 1930s, and some still have knob-and-tube or cloth wiring mixed with later circuits.
- Permits in Salt Lake City
- Electrical permits in Salt Lake City come from the city's Building Services division; other cities in the valley run their own. Utah electricians are licensed by the Division of Professional Licensing (DOPL).
- Electric utility
- Rocky Mountain Power
Signs to look for
- Ceramic knobs and tubes visible in the attic or basement
- Two-prong outlets throughout the house
- An insulation contractor or energy program requiring an assessment
- An insurer asking about wiring type
- Fuses or a small service alongside old wiring
How the work is done
1. Trace active circuits
The electrician identifies which knob-and-tube runs are still live and where they go.
2. Plan the routes
New cable routes are planned through attics, basements and walls to minimize openings.
3. Install new circuits
Grounded cable, boxes and devices are installed and the old wiring is disconnected.
4. Inspect and patch
Rough-in and final inspections are completed, and access holes are patched.
What moves the price in Salt Lake City
Electricians set their own prices. Older homes often have small services and ungrounded circuits, and finishing a basement is one of the most common reasons to add circuits.
- How much knob-and-tube is still active
- Plaster versus drywall walls
- Attic and basement access
- Number of floors
- Panel upgrade at the same time
- Wall patching and painting
Knob-and-Tube Wiring Replacement in Salt Lake City: questions
Do I need a permit for knob-and-tube wiring replacement in Salt Lake City?
Usually, yes. Electrical permits in Salt Lake City come from the city's Building Services division; other cities in the valley run their own. Utah electricians are licensed by the Division of Professional Licensing (DOPL). The electrician normally pulls the permit and schedules the inspection.
Is the utility involved in Salt Lake City?
If the work affects the meter or service, the electrician coordinates with Rocky Mountain Power, which owns the meter and service drop.
Is knob-and-tube wiring illegal?
Existing knob-and-tube is generally not illegal, but it cannot be extended, and many insurers and lenders treat it as a reason to replace.
Can knob-and-tube be insulated over?
It is not recommended, and many codes and insulation programs prohibit it, because the wiring relies on open air to cool.
How do I know if mine is still live?
An electrician can test it. Many homes have a mix of active and abandoned knob-and-tube.
How long does replacement take?
From a few days for a small home with good access to a few weeks for larger plaster-walled homes.
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