Most electrical problems are a symptom of something you can't see. OSB finds the actual fault in Waltham homes and businesses — the loose neutral, the failed backstab, the shared circuit — instead of guessing at parts.
“Our panel was original to the house and completely full. OSB upgraded us to 200 amp, pulled the permit, met the inspector, and left the basement cleaner than they found it.”
“Bought an EV and had no idea what my panel could handle. They did the load calculation, told me straight that I had room, and installed the charger two days later.”
“We had knob-and-tube in the attic and our insurer was getting nervous. They rewired in stages so we never lost power for more than a few hours at a time.”
That's the job. We isolate circuits, test under load and trace the run until the actual fault shows itself — no guessing, no parts cannon.
Three causes: overload, short circuit, or ground fault. Each has a different fix, and testing tells us which one it is within the first visit.
Most Waltham repair calls are handled same-day, and emergencies are dispatched 24/7 at (833) 652-8933.
There's a flat diagnostic fee quoted on the phone, and it's credited toward the repair when you go ahead.
Yes. We produce written inspection findings for Waltham home sales, insurers and landlords.
New boxes, remotes, high ceilings
See serviceCKT 200A100A to 200A service, breaker boxes
See serviceCKT 20AGFCI, USB, dedicated circuits
See serviceCKT 24/7No power, sparks, burning smell
See serviceCKT 15ARecessed, outdoor, LED retrofit
See serviceCKT SPDPanel-mounted surge protective devices
See serviceFlat pricing quoted before the work starts. Same-day and next-day slots available across Massachusetts.
Overload, short circuit or ground fault — each has a different cause and a different fix.
ReadGUIDEThe old wiring in your attic, explained — plus what a staged rewire actually looks like.
ReadGUIDEWhat to decide before you book a Level 2 charger install — and the load calculation that decides for you.
Read