The lights work. The breakers haven’t tripped in a while. The house looks fine. But if your San Antonio home was built before 2000 and hasn’t had a professional electrical review, “looks fine” is doing a lot of heavy lifting. Heat cycles, humidity, aging materials, and two decades of added appliances all affect a system that isn’t visible from the outside.
We’ve been inspecting residential electrical systems in San Antonio since 2005, with every inspection backed by Master Electrician oversight from our founder, George Salinas. What we find most often isn’t dramatic. It’s gradual: panels that were adequate in 1985 but weren’t built for today’s loads, connection points that have loosened over time, protection devices that were never installed in the first place. A professional inspection makes all of that visible and, more importantly, manageable.
Here’s what the process actually looks like from start to finish.
Why San Antonio’s Climate Makes Electrical Inspections More Urgent
San Antonio’s combination of extreme summer heat and year-round humidity is harder on wiring and panels than most parts of the country. Heat accelerates the breakdown of wire insulation, while humidity drives corrosion inside service panels and at connection points. A panel that looks structurally intact can have corroded breaker connections that quietly compromise its function.
Older neighborhoods across the city carry additional risk from the materials used when they were built. Aluminum wiring, common in homes built in the 1960s and 1970s, is still present in many San Antonio properties. Federal Pacific Electric and Zinsco panels (two brands with documented histories of breaker failure) also turn up regularly during residential inspections here. Many of these homes also came with 100-amp service panels that made sense at the time but weren’t designed to handle modern appliance loads, let alone EV chargers or whole-home generators.
When to Schedule a Home Electrical Inspection
Some situations make scheduling straightforward. Others are easy to postpone. These are the circumstances where an inspection delivers the clearest value:
- Buying or selling a home: an inspection gives buyers a complete picture before closing and gives sellers the chance to address issues before they become negotiating points.
- Homes over 20 years old with no prior electrical review, particularly those with original wiring and panels.
- After a major renovation that added circuits, relocated outlets, or changed load demands on the existing system.
- Before installing high-draw equipment such as an EV charger, whole-home generator, or central HVAC replacement, to confirm the service panel can support the new load.
- Recurring symptoms including flickering lights, outlets that feel warm to the touch, breakers that trip more than occasionally, or a burning smell anywhere in the home.
For homes with no active problems, a review every three to five years is a reasonable baseline. Homes with aluminum wiring or panels from the pre-1980s era warrant more frequent attention.
What Happens During the Inspection, Step by Step
A professional home electrical inspection follows a consistent process. It’s thorough, but it doesn’t require tearing into walls or shutting off power to the whole house for hours.
The Opening Conversation
Before the walkthrough starts, we ask about the home’s age, any renovations or additions, and whether the homeowner has noticed anything unusual. Tripping breakers, flickering lights, outlets that stopped working, rooms added without a permit: all of this shapes where we look and what questions we’re trying to answer.
The Walkthrough
The inspection covers every accessible part of the electrical system: the service panel and its breaker condition, all accessible wiring runs, the service entrance where power comes into the home, and the grounding and bonding connections that protect the system during a surge. Every outlet and switch is checked for condition, proper wiring, and polarity. Lighting fixtures, exterior electrical components, and the attic and crawl space (if accessible) are part of the review as well.
We test for Ground Fault Circuit Interrupter (GFCI) protection (required in bathrooms, kitchens, garages, and exterior locations) and Arc Fault Circuit Interrupter (AFCI) protection on bedroom, living-area, kitchen, hallway, laundry, and other habitable-space circuits. GFCI devices cut power within milliseconds when they detect a current leak to ground; AFCI breakers detect the electrical signature of an arc fault, the kind of event that can ignite insulation inside a wall. Both are standard requirements under the National Electrical Code (NEC), along with Texas state regulations enforced by the Texas Department of Licensing and Regulation (TDLR).
We use a multimeter to verify voltage levels and outlet testers to confirm polarity and ground continuity at receptacles throughout the home. Nothing about this process is invasive. We don’t need to open walls to complete a thorough inspection.
Common Issues We Find in San Antonio Homes
Every home is different, but certain findings come up consistently in the San Antonio area.
Outdated Panels
Homes built before the 1980s often have 100-amp service panels that predate today’s electrical load demands. Many homeowners have added window AC units, refrigerators, large televisions, and home office equipment without any change to the underlying panel. Federal Pacific Electric and Zinsco panels are flagged for replacement when found; both have documented histories of breakers failing to trip during an overload, which defeats their core safety function.
Aluminum Wiring
Aluminum wiring isn’t dangerous simply because it’s aluminum. The problem is at the connection points. Aluminum oxidizes over time and expands and contracts differently than copper, which causes connections at outlets, switches, and fixtures to loosen. Loose connections create heat buildup, a documented fire risk even when the wiring itself appears intact.
Missing GFCI & AFCI Protection
Pre-2000 construction almost never included AFCI breakers, and GFCI requirements have expanded significantly under updated NEC cycles. Finding bathrooms, garages, or kitchens without functional GFCI protection is routine. These are code deficiencies that can be corrected without rewiring the circuits involved.
Preparing Your Home for the Inspection
Very little preparation is needed. Clear a path to the service panel before we arrive and make sure the attic hatch and any crawl space entry points are accessible. Write down any recurring issues you’ve noticed (even minor ones) and share them at the start of the visit. That information helps us prioritize. Power stays on throughout the inspection, so there’s no need to empty your refrigerator or plan around a full outage.
Understanding Your Inspection Report
When the walkthrough is complete, findings are organized by urgency. Items that require prompt attention are separated from code-compliance upgrades that can be scheduled on a reasonable timeline, and informational observations with no immediate risk are noted separately. Not every finding means work needs to start tomorrow.
We walk through the report in plain language before we leave, explain the reasoning behind each recommendation, and provide a written estimate for any repairs we identify. Our goal is for every homeowner to leave the conversation knowing exactly what their system looks like, what needs attention, and what can wait.
If your home is overdue for a review (or you’re adding an EV charger or generator and want to know what your panel can actually support), Absolute Power Electrical Contractors provides free estimates, upfront pricing, and an Absolute Advantage Membership that includes annual inspections as part of ongoing service. Give us a call at (210) 981-6868 to get started.