What the condition actually is
A building's electrical service is where utility power arrives, is metered, and is distributed to units and house loads. It was sized once, at design, against the loads the designer expected, and everything downstream — service conductors, main switchgear, meter bank, feeders, unit panels, branch circuits — was sized to the same assumptions. What gets called an electrical problem in an older tower is usually three problems arriving together:
- Capacity — the service was sized for a demand profile that no longer describes how the building is used.
- Condition and obsolescence — equipment aged past the point where it can be reliably maintained, sometimes past the point where parts exist.
- Specific legacy defects — materials and equipment from particular eras now recognised as hazards independent of age or capacity.
One correction first, because it is the assumption most readers arrive with. An old building is not automatically short of power. The defensible claim is narrower and more useful — the original design assumptions no longer describe the building, in both directions, and the actual available capacity is a measurable quantity nobody has necessarily measured.
Original sizing versus how the building is used now
The demand profile has moved since mid-century construction. Air conditioning went from absent or window-mounted to central; kitchen and laundry loads rose, and in-unit laundry became standard in buildings designed around a common laundry room; electric cooking replaced gas in many renovations; plug load rose generally; and electrification of heating and hot water adds demand to services sized when those loads were gas. But not every change pushes the same way, which is where most published commentary goes wrong. Lighting load has fallen dramatically with LED conversion, and modern appliances and HVAC equipment are far more efficient than what they replaced. Some older buildings have more spare capacity than anyone expects.
How available capacity is determined
This is what separates an engineer's answer from a guess. The NEC provides a method for determining the existing load on a service or feeder from measured maximum demand data — recorded peak over a defined monitoring period, adjusted by a defined factor, plus the new load being added. The numeric parameters are edition-dependent, so the method must be applied using the edition the jurisdiction has adopted. In practice: utility demand history for the building's meters; a metered load study, with recording meters on the service and major feeders across a period capturing seasonal peaks; infrared thermography of switchgear, panels and terminations, finding the thermal signatures of loose, degraded or overloaded connections; and a physical survey of conductors, grounding, bonding and terminations. Thermography is not merely good practice everywhere — Miami-Dade County's building recertification requires it in the electrical inspection for services at or above 400 amperes, performed by certified technicians.
EV charging, the pressure that finds the answer first
This is the live issue in associations right now, and usually the moment a board discovers what its capacity actually is. EV charging differs from other load growth because it is large, sustained and has low diversity relative to its size: a Level 2 charger draws near its rated current for hours, and vehicles charge on similar schedules. A handful of chargers is normally absorbed. Charging at a scale matching eventual adoption across a building's parking count is a different order of problem, landing on the same service, feeders and panels as everything else.
Three ways it gets connected, and the choice drives everything after it. From the owner's own panel, so the charger is a branch circuit of the unit and the owner is metered directly — clean billing, but it needs spare capacity in that panel and a conduit route to the parking space that in a tower can be long and awkward, and it consumes headroom the owner may later want for electrified heating or cooking. From a house panel with sub-metering, which simplifies routing but puts the association into the billing, maintenance and cost-allocation business among owners who do and do not have vehicles. Or from a dedicated EV service: cleanest technically, most expensive up front, and dependent on utility capacity at the site.
Load management is the pivotal technology and the most commonly missed fact. Rather than sizing infrastructure for every charger at full current simultaneously, an energy management system limits aggregate charging demand to what the service supports, allocating current among connected vehicles. The NEC recognises energy management systems as a basis for load calculation, which allows substantially more ports on an existing service than a worst-case calculation would permit. For many associations that is the difference between a feasible project and a service upgrade.
Aluminium wiring: two different things that get confused
Aluminium branch circuit wiring — the recognised hazard
Small-gauge aluminium conductor on 15- and 20-ampere branch circuits: outlets, switches, lighting. The US Consumer Product Safety Commission's Publication 516 puts the installation period at roughly 1965 into the mid-1970s, driven by copper prices; buildings from before 1965 are unlikely to have it.
CPSC reports research finding homes wired with aluminium branch circuits before 1972 were 55 times more likely than copper-wired homes to have one or more connections at outlets reach what CPSC characterises as fire hazard conditions. The operational point matters as much: CPSC states that failing aluminium connections seldom give easily detected warning signs. No flicker, no smell, no symptom — which is why "we have never had a problem" is not evidence of anything.
Repairs CPSC endorses: complete replacement with copper, which eliminates the hazard and costs most; COPALUM crimp connectors, a pigtailing repair joining a copper pigtail to the aluminium conductor with manufacturer-supplied tooling and trained installers, which CPSC treats as an effective permanent repair; and AlumiConn set-screw connectors, acceptable where COPALUM is unavailable, with the shorter performance record noted. Repairs CPSC does not endorse: twist-on wire connectors, including those marketed for aluminium-to-copper, where CPSC reports severe overheating in testing; non-COPALUM crimp connectors, which were not evaluated; and CO/ALR switches and receptacles alone, which CPSC reports failed laboratory testing and which address only device terminations, not splices in boxes. CPSC's position is that these are acceptable only as emergency temporary measures pending permanent repair.
Aluminium feeders — not the same thing
Large-gauge aluminium is used routinely and code-compliantly for service entrance conductors and feeders, including in new construction, using alloys developed to address creep in the earlier material. Aluminium feeders are not a defect. What matters is termination practice: lugs rated for aluminium, torqued to specification, conductor properly prepared. In an older tower, aluminium feeders to unit panels are common, usually fine, and the risk concentrates at the panel lugs and the meter bank — which is what an infrared survey is for.
Panels and gear that can no longer be maintained
Specific legacy equipment lines. Certain mid-century panelboard and breaker lines — Federal Pacific Electric "Stab-Lok" and Zinsco or Sylvania-Zinsco are the two most often named — have been the subject of long-standing concerns that breakers may fail to trip on overcurrent. The accurate statement is narrower than the trade narrative: there is no federal recall and no formal CPSC hazard determination for these lines that could be verified. What is true is that inspectors, electricians and insurers widely identify them as warranting replacement, and that their presence is commonly a transaction and insurance issue regardless of how the underlying technical dispute is characterised. Treat them as a cost and coverage question, and do not accept a claim that a recall exists.
Parts and support obsolescence is less dramatic and more consequential. Switchgear, panelboards and breakers from earlier decades reach a point where the manufacturer no longer supports them and replacements come only from reconditioned-equipment brokers, so a failure that would be a same-day repair becomes a multi-week outage. On a building's main switchgear that is a genuine operational risk: a failed main breaker on unsupported equipment can mean extended loss of service to the whole building.
Who owns it, and what it means for money and financing
The general framework, which the recorded declaration and state statute control. The service entrance, main switchgear, meter banks, house panels, feeders and all distribution serving more than one unit are common elements and the association's responsibility. The unit panelboard is the boundary case — the more common treatment makes the feeder common and the panel and everything downstream the owner's, but this genuinely varies. Branch circuits, devices and appliances inside the unit are the owner's in essentially every declaration. Parking-area electrical infrastructure is a common element even where the spaces are limited common elements, which is why EV charging is a common-element question even when it serves one owner. Aluminium branch wiring is usually the owner's to remediate, creating a collective-action problem: the hazard is building-wide, the responsibility individual, and the association's power to compel remediation limited to its rules and state law. Some associations require remediation on sale or on renovation.
Reserves. Electrical distribution is a legitimate reserve component with a long life and a large replacement cost, frequently missing from older studies precisely because it is long-lived and out of sight. In Florida, "electrical systems" is an enumerated mandatory component of a structural integrity reserve study under Fla. Stat. §718.112(2)(g). The difficulty specific to electrical work is that the trigger is often external rather than end of life — an electrification requirement, EV demand, a failure of unsupported gear, an insurer's condition — so a plan built on nominal equipment life gets caught out. Service upgrades are also large, lumpy and hard to phase, which makes them a classic special assessment item, and EV infrastructure raises a harder question still: whether it is a common expense at all or a user-funded improvement. Associations have gone both ways, and the answer turns on the declaration's treatment of improvements versus maintenance and on the state law vote requirement.
Insurance bites before financing does: electrical condition is a direct underwriting factor, and legacy panel lines and aluminium branch wiring are common causes of declination or of remediation required as a condition of coverage — and a master policy problem is a project-level problem. Financing. Capacity itself is not an agency test, and a building with a modest service, sound equipment and no open findings is ordinary and financeable. Electrical condition reaches a lender indirectly: deferred maintenance affecting safety and soundness, and the findings of a required inspection. Where a jurisdiction's periodic inspection covers electrical work — Miami-Dade's recertification expressly does — an adverse finding becomes documented and dated.
What to ask. Whether a load study has ever been performed and what it found; whether an infrared survey exists, and when; what the association's position on EV charging is, because "we will deal with it later" is a cost sitting in the future; and, if the building falls in the aluminium branch wiring window, have the wiring method identified and priced against the repairs CPSC endorses. Sizing a service is licensed engineering work — an inspector can flag a panel type but cannot tell you what the building can carry.
Common questions
Will an old electrical service stop me getting a mortgage?
Almost never on its own. There is no agency test for how many amps a building has. What can affect a loan is an open safety finding, unaddressed deferred maintenance affecting safety and soundness, an adverse finding in a required inspection where the jurisdiction has one, or a pending special assessment to fund an upgrade. A building with a modest original service, well-maintained gear and a clean record is ordinary and financeable.
Are Federal Pacific and Zinsco panels recalled?
No. There is no federal recall and no formal CPSC hazard determination for these panel lines that we could verify, and anyone telling you otherwise is repeating trade folklore. What is accurate is that inspectors, electricians and insurers widely treat them as warranting replacement, that they are routinely called out in transactions, and that they can obstruct obtaining or keeping insurance. Treat it as a cost and coverage question and price the replacement.
Is aluminium wiring in a condominium dangerous?
It depends which kind. Small-gauge aluminium branch circuit wiring, installed from about 1965 into the mid-1970s, is the recognised hazard: CPSC Publication 516 reports research finding pre-1972 aluminium-wired homes were 55 times more likely than copper-wired homes to have connections at outlets reach fire hazard conditions, and CPSC notes there are usually no warning signs beforehand. Large-gauge aluminium feeders and service conductors are a different matter — used routinely in current construction and not a defect, provided terminations are rated, prepared and torqued correctly.
Can my building support EV charging?
That is answered by measurement, not assumption. An engineer establishes existing peak demand from utility data and a metered load study, applies the code method for determining existing load, and compares the headroom with the proposed charging load. Load management changes the arithmetic substantially: an energy management system caps aggregate charging demand to what the service supports, and the NEC allows that limit to be used in the calculation, which is often what makes a project feasible without a service upgrade.
Who pays for EV charging infrastructure in a condominium?
It depends on the declaration and on state law, and associations have gone both ways. The question is whether shared charging infrastructure is a common expense or a user-funded improvement, which turns on how the declaration treats improvements versus maintenance and on the vote required for capital improvements. Separately, a growing number of states have right-to-charge statutes limiting an association's ability to refuse an owner's own installation, subject to conditions and with the owner bearing cost. Terms vary by state, so this is a question for the association's attorney.
Does an old building always need an electrical upgrade?
No, and this is commonly overstated. Demand has moved in both directions: air conditioning, in-unit laundry, electric cooking and plug load pushed it up, while LED conversion and far more efficient appliances and HVAC equipment pushed it down. Some older buildings have more spare capacity than anyone expects. The correct statement is that the original design assumptions no longer describe the building, and that actual capacity is measurable and often has never been measured.