Professional Knob and Tube Wiring Replacement Services in Fort Collins, CO
Knob & Tube Wiring – Upgrade for Safety & Efficiency
Knob-and-tube wiring, used in homes built between 1880 and 1940, is an outdated electrical system that lacks grounding and cannot support modern electrical loads. While it was once an effective wiring method, it now poses fire hazards, electrical code violations, and insurance issues.
PH Electric specializes in knob-and-tube wiring inspection, replacement, and rewiring to ensure your home is safe, code-compliant, and capable of handling modern appliances.
What Is Knob & Tube Wiring?
Knob-and-tube (K&T) wiring consists of copper conductors, porcelain knobs and tubes, and outdated insulation made from natural rubber or cotton. Unlike modern electrical systems, it lacks a ground wire, making it unsafe for kitchens, bathrooms, and outdoor circuits.
How to Identify Knob & Tube Wiring
- Porcelain knobs and tubes mounted to joists.
- Cloth-wrapped or rubber-insulated wiring in walls or attics.
- Two-wire (hot and neutral) electrical outlets with no grounding.
Why Knob & Tube Wiring Is a Hazard
Lack of Grounding
 Increases risk of electrical shocks and power surges
Aging Insulation
Rubber and cotton insulation deteriorates over time, exposing wires.
Overloading Risks
Home Insurance Issues
Fails Home Inspections
Knob & Tube Wiring Replacement & Upgrades
While knob-and-tube wiring is not illegal, it should be replaced with modern electrical wiring to meet National Electrical Code
(NEC) safety standards.
Our Electrical Upgrade Services
Full Knob & Tube Wiring Replacement
Replace outdated wiring with safe, grounded electrical systems.
Partial Rewiring
Electrical Panel Upgrade
GFCI & Surge Protection
Install ground fault circuit interrupters (GFCIs) and surge protectors for added safety.
Frequently Asked Questions (FAQ)
How much does knob-and-tube replacement cost?
- Partial rewiring: $2,500+ – $7,500+
- Full home rewiring: $8,000+ – $20,000+
- Electrical panel upgrade: $2,000+ – $5,000+
Will knob-and-tube wiring pass a home inspection?
- No. Most inspectors flag it as a safety hazard, and many insurance providers require electrical upgrades.
Why Choose PH Electric?
PH Electric offers professional knob-and-tube wiring replacement, ensuring your home meets modern electrical and safety standards.
- Licensed electricians with experience in older home electrical upgrades
- Safe and code-compliant rewiring following NEC and local regulations
- Improved home safety, resale value, and insurance compliance
