Aluminum Wiring Repair in San Jose and Santa Clara County. Keep the Wire, Fix the Connection.

Aluminum wiring was used primarily in homes built between 1965 and 1973. Check visible wire runs in the attic, basement, or garage. Aluminum wire is labeled AL, ALUM, or ALUMINUM printed on the plastic jacket every few feet, and it is a dull silver-gray color where copper is a warm reddish-brown. Check behind an outlet cover with the power off: look for AL markings on the wire jacket, or devices stamped CO/ALR or AL-CU, which indicates aluminum-compatible terminations were previously installed. Symptom signs include outlet covers that are warm to the touch, flickering lights, a burning plastic smell near outlets, or breakers that trip unexpectedly under modest loads. If you are unsure, call (408) 614-4451. Our team can identify aluminum wiring during a free estimate walkthrough.

Yes. Pre-1972 single-strand aluminum branch circuit wiring is a recognized fire hazard. The U.S. Consumer Product Safety Commission found that homes wired with pre-1972 aluminum wire are 55 times more likely to have one or more connections reach fire hazard conditions than copper-wired homes. The danger comes from aluminum thermal expansion, oxidation at connection points, and a tendency to creep out from under terminals over time, all of which create resistance, heat, and arcing at outlets, switches, and fixtures throughout the home. The CPSC documented a 1974 fatal house fire in Hampton Bays, NY traced directly to an overheating aluminum wire connection at a wall receptacle.

There are three repair paths, and they are not equivalent. CPSC Publication 516 identifies COPALUM crimp pigtailing as the permanent repair: a hydraulic tool cold-welds copper to the aluminum at every connection. It treats AlumiConn as acceptable when it is correctly installed at every connection. Cali Rollin Electric is not COPALUM certified, so we perform AlumiConn pigtailing and describe COPALUM rather than offer it. CO/ALR device replacement is a different thing: it swaps receptacles and switches for aluminum-rated hardware, which is listed, code-compliant work expressly permitted by California Electrical Code 406.3(C) and 404.14(C) for aluminum conductors on 20-amp and smaller circuits, and it fixes the device terminations. What it does not do is reach the splices and fixture connections beyond the device, which is why CPSC does not treat it as eliminating the hazard and why it is the method carriers most often reject as a complete solution. Full copper rewiring removes the aluminum branch wiring altogether. Whichever path you take, it has to be applied to every aluminum termination in scope to be worth anything.

Both put a copper pigtail on the aluminum conductor so that every device terminal sees copper instead of aluminum. COPALUM uses a hydraulic tool to cold-weld the copper and aluminum into a single metal joint, and it is the repair CPSC Publication 516 identifies as permanent, but it requires a manufacturer-certified installer with the specific tooling. Cali Rollin Electric is not COPALUM certified, so we describe it rather than offer it. AlumiConn is a small three-port lug connector that torques each conductor into its own set screw, with antioxidant compound already in the ports. It was evaluated later, it fits inside a standard box, it does not need proprietary tooling, and carriers generally accept it when it is installed at every connection and documented. What the CPSC does not treat as a permanent repair is an ordinary twist-on wire connector, including the ones marketed as AL/CU rated, so a home that was "fixed" with purple wire nuts has usually not been fixed at all.

It depends on the carrier, and this is the most important question to ask your insurance agent before choosing a repair method. Underwriting rules vary by carrier and change, so treat the following as what our team sees rather than a rule. Full copper rewiring removes the aluminum entirely, so there is nothing left for a carrier to underwrite around, and it is the method they question least. COPALUM or AlumiConn pigtailing throughout the home is commonly accepted when it is done comprehensively and documented by an electrical contractor. CO/ALR devices on their own are the method most often rejected as a complete solution, because they address the device terminal and not the splices beyond it. Before spending money on a repair, call your carrier and ask exactly what documentation and scope it requires, in writing. Cali Rollin Electric provides written documentation of all repair work for insurance purposes.

Cali Rollin Electric pricing for aluminum wiring repair in San Jose and Santa Clara County: CO/ALR device remediation for a full home up to 1,500 sq ft runs $3,500–$6,500, and for 2,500 sq ft or more runs $6,000–$10,000. Partial copper rewire covering high-risk circuits only runs $5,000–$12,000. Full copper replacement runs $12,000–$22,000 or more. Permits vary by city and typically add $500 to $1,000 depending on jurisdiction. AlumiConn pigtailing is quoted per connection count after the assessment, because the price turns on how many terminations are reachable. All pricing is provided in a written quote after a full assessment of your specific home.

Physically removing aluminum wire from the walls is not required. The CPSC explicitly endorses leaving aluminum wire in place when COPALUM or AlumiConn connectors are properly installed at every connection point. The copper pigtails mean that everything the aluminum wire connects to is copper, making the aluminum a safe, protected conductor inside the wall. What this requires to be safe and insurable: every accessible junction box, outlet, switch, light fixture, and appliance connection must be addressed, not just a selection. The panel connections must be inspected and treated with anti-oxidant compound. A C-10 contractor must document the full scope in writing. During any permitted renovation, Cali Rollin Electric replaces aluminum wire in the affected area as a matter of course.

No, and this is the most common confusion on the subject. The hazard is solid single-strand aluminum used for 15-amp and 20-amp branch circuits, roughly 1965 to 1973. Large multi-strand aluminum conductors are a different alloy with a different termination, they are still installed today, and they remain code-compliant for service entrance conductors and for heavy feeders to a subpanel, range, or air conditioner. Those land on lugs rated AL-CU, with antioxidant compound and a torque specification, and they are not what the CPSC findings are about. So when a home inspector writes up aluminum at the meter or the main, that is frequently normal and correct. What matters for this page is what is feeding your receptacles, switches, and light fixtures.

Yes. Replacing devices throughout a home, pigtailing every connection, or rewiring circuits is permitted work in every Santa Clara County jurisdiction, and our team files the permit, coordinates the inspection, and delivers the permit close documents alongside the remediation letter. Permits vary by city and typically add $500 to $1,000 depending on jurisdiction. The permit record matters beyond the inspection itself: it is the third-party proof that the work actually happened, which is exactly what an insurance underwriter or a buyer agent asks to see later.

It usually comes up. California sellers disclose known material facts about the property, and a home inspector will normally flag aluminum branch circuit wiring on the report. Buyers commonly respond by asking for a credit, and their lender or insurer can make binding a policy a condition of closing, which puts the issue on the critical path. Documented remediation, with the permit and the written scope, tends to settle it faster than a price concession, because the buyer can hand the letter straight to their carrier. Getting the assessment done before you list means the number is known rather than negotiated against a deadline.