Services · Tucson, Arizona
A dental or medical suite packs an unusual amount of equipment into a small footprint — chairs and exam tables, imaging, a compressor and vacuum pump in a closet, a sterilization bay, and the network the practice actually runs on. Arizona Electrical Solutions builds outpatient office electrical scopes across Tucson: operatory and exam-room power, imaging circuits coordinated to the equipment vendor's own spec sheets, patient-care wiring under NEC Article 517, and the low-voltage behind all of it. Request a bid →
Dental & Medical Offices
A private-practice suite is not a general office with a few extra circuits. Every chair, imaging unit, sterilizer, compressor, and vacuum pump arrives with a manufacturer's electrical specification and a rough-in template, and those documents — not a rule of thumb — decide the circuit, the voltage, the stub-up location, and the disconnect. Our job is to read them, reconcile them against the code and the panel that actually exists, and build to them. When a spec sheet is missing or a vendor has not been selected yet, we say so in writing at bid time instead of guessing and eating the change order later.
This page is about outpatient offices and clinics — the tenant improvement a practice owner and a general contractor are running inside a leased suite. Hospital and campus work, where essential electrical systems under NEC 517, NFPA 99, and NFPA 110 govern an entire facility, lives on our healthcare & institutional page. The mechanics common to any suite build-out — safe-off and demo, panel changes, plan review, inspection sequence — are on our tenant improvement electrical page, and the full self-performed scope is on our commercial electrician page.
Chairside power set from the chair manufacturer's rough-in template — floor stub-ups located before the slab is covered, utility-center connections at the delivery unit, and circuits at the 12 o'clock cabinet for the monitor, the intraoral camera, and the curing light. Receptacles land where the clinician works, not where a generic outlet spacing rule put them.
How we run a build-out →Imaging equipment gets the circuit its own site-preparation document calls for — dedicated branch circuit, the momentary line current and line-impedance limits the vendor publishes, a disconnect the service tech can lock out, and the data drop beside it. Penetrations through a shielded wall get detailed with the shielding contractor rather than drilled after the fact.
In-house electrical engineering →The utility closet behind every operatory: dedicated motor circuits for the air compressor and vacuum pump, with branch-circuit conductors and overcurrent protection sized from the table full-load current values NEC 430.6(A)(1) points to and overload protection set from the motor's nameplate current, a disconnecting means within sight of each motor per NEC 430.102(B), power for the amalgam separator and any medical-gas alarm, and sterilizer, ultrasonic, and water-distiller circuits with GFCI protection where NEC 210.8(B) requires it near the sink.
The full self-performed scope →Scoping It
Two suites of identical square footage can be very different electrical projects. When we price one, these are the variables that move the number and the calendar:
Roughing in a shell operatory you will finish in three years costs a fraction of opening finished walls and floors later to add it. The same is true of spare capacity in the suite panel. We price the growth option separately at bid time so it is a business decision made on purpose, not a regret discovered at the second expansion.
A second-generation dental space may hand you a usable panel, an equipment closet, and stub-ups in roughly the right places. A cold shell hands you a feeder and a floor. The gap between the capacity the suite has and the load a modern practice draws — imaging, sterilization, motors, and a full IT closet — is often the largest single line item, and it should surface on day one of design.
An intraoral unit in each operatory is a very different scope than a CBCT with its own dedicated circuit, disconnect, shielded room, and workstation. Imaging is also where vendor requirements are strictest, so the equipment decision drives both the circuit design and the point at which the design can be finalized.
This is the number one schedule risk on practice build-outs, and it is rarely the electrician's doing. A chair line changed after rough-in moves stub-ups through finished flooring; a different imaging unit changes the circuit and sometimes the wall. We chase the equipment schedule early and hold a written log of what is still open, because decisions made on paper cost a fraction of decisions made in the field.
Patient-Care Wiring
Article 517, Part II applies to patient care spaces — the rooms where patients are examined and treated. It does not sweep in the whole suite: business offices, waiting rooms, corridors, and similar spaces are outside its reach under NEC 517.10(B). The detail that governs the rest is the patient care vicinity, the space extending roughly six feet around the chair, table, or exam bed and about seven and a half feet above the floor. Wiring inside that envelope carries requirements that the same wiring twelve feet away does not.
The classification itself is a judgment call the code assigns to the facility's governing body — in a private practice, that is the owner working with the designer and the AHJ. The reasoning runs on consequence, and the four categories in NEC Article 100 read in this order: Category 1, critical care, is a space where the failure of electrical equipment is likely to cause major injury or death; Category 2, general care, is a space where failure is likely to cause minor injury; Category 3, basic care, is a space where failure is not likely to cause injury but can cause the patient discomfort; and Category 4, support, is a space where failure would have no physical impact on patient care. A routine dental operatory commonly lands in Category 3, as does a plain physician's exam room. Sedation, oral surgery, or any procedure where equipment is applied to the patient such that a failure could cause minor injury pushes a room up to Category 2. The governing body of the facility makes that call, not the electrician and not the equipment vendor, so we lay out what each classification costs in wiring before the drawings are stamped and the decision gets made on purpose rather than by default.
Where a room is classified Category 1 or Category 2, the headline requirement is redundant grounding. NEC 517.13 opens by saying that wiring in Category 1 and Category 2 spaces shall comply with 517.13(A) and (B) — a metal raceway or a cable armor or sheath that qualifies as an equipment grounding conductor, plus an insulated copper equipment grounding conductor run with the branch-circuit conductors. A Category 3 space does not automatically carry that requirement. The difference is real money, because the redundant method is a materially more expensive way to wire a room than ordinary commercial branch circuits, which is why the classification has to be settled on paper before anyone prices the treatment area — and it is exactly the kind of item that gets missed when a general-purpose contractor prices a medical suite like an office, in either direction. Receptacle counts, listed hospital-grade devices where the rules for the assigned classification call for them, and the limits NEC 517.16 places on receptacles with insulated grounding terminals all follow from the same classification, which is why an imaging or IT vendor's request for an isolated ground has to be reconciled with the code rather than simply honored.
Occupied Buildings & Permits
Most outpatient build-outs happen inside a medical office building that never closes. The neighbors are seeing patients through the shared corridor your material has to travel down, and their ceiling plenum is often the same one your conduit runs in. So the conduct is planned before mobilization: containment and dust control at the suite line, HEPA filtration and negative pressure where the building or an infection-control risk assessment calls for it, cutting and coring scheduled around the neighbors' patient hours, exit paths and corridor egress kept clear at all times, and badged crews who check in with property management rather than appearing unannounced.
Our crews work Monday through Thursday from 6:00 to 3:00 and Friday from 6:00 to 2:00, and that early start does more for a medical office building than it does almost anywhere else — the loudest work happens in the hours before the first patient arrives. What we are not is a 24/7 emergency dispatcher, and we will not tell you otherwise; when something is urgent, it goes into the earliest slot we have. Planned off-hours work is a different question and it stays on the table: a shutdown that touches a shared riser or the building's house panel gets sequenced in advance with property management, noticed to the other tenants, and moved to a night or a weekend when the building cannot lose power during patient hours.
Locally, the permit path runs through City of Tucson or Pima County plan review depending on where the building sits, with separate electrical, mechanical, and plumbing scopes and a rough and final inspection sequence that gates the day the practice can see its first patient. If the suite needs more capacity than the building's existing service allows, Tucson Electric Power or Trico enters the schedule, and their timeline is not one anyone compresses. Two Tucson realities also belong in the design rather than the punch list: an equipment closet holding a compressor, a vacuum pump, and the network rack becomes a heat problem in a 110-degree summer, so cooling and exhaust get designed alongside the power; and monsoon storms are hard on sensitive electronics, which is why surge protection at the panel serving imaging and IT is cheap insurance next to a sensor board or a CBCT service call.
Self-Performed
The clinical trades that get squeezed at the end of a practice build-out — lighting quality and the low-voltage the practice actually runs on — are ours, on the same schedule as the power. Nothing waits on a second contractor to show up after the grid is closed.
Color rendering is a clinical spec in a dental office — matching a shade under a poor light source produces a restoration the patient notices in daylight — so we specify high-CRI sources with real red rendering and consistent color across the operatory. Glare gets controlled for a patient lying face-up, exam and consult rooms get dimming, and the occupancy sensing and automatic shutoff the adopted energy code requires are designed in rather than added at final inspection.
Cabling for practice-management workstations, digital sensors and chairside monitors, the server or network closet with its own conditioned power, staff paging and room-status signaling where the practice uses it, and camera and access-control rough-in at the safe, the drug storage, and the back door — pulled with the power, tested, and labeled.
FAQ
Yes, and we insist on it. Chairs, delivery units, imaging, sterilizers, compressors, and vacuum pumps each publish an electrical specification and a rough-in template, and those documents govern the circuit, the voltage, the stub-up location, and the disconnect. We collect them during design, reconcile them against the code and the panel that exists, and keep a written log of the items still undecided. If a piece of equipment has not been selected when we bid, we say so and price an allowance rather than guessing — because a chair line or imaging unit chosen after rough-in is the single most common cause of a change order on a practice build-out.
The parts of it that are patient care spaces, yes. Article 517, Part II applies to rooms where patients are examined and treated, and it explicitly does not reach business offices, waiting rooms, and corridors. What those rooms cost to wire then depends on the category the facility's governing body assigns them: Category 1 (critical care) is a space where an equipment failure is likely to cause major injury or death, Category 2 (general care) where failure is likely to cause minor injury, Category 3 (basic care) where failure is not likely to injure but can cause the patient discomfort, and Category 4 (support) where failure has no physical impact on patient care. The redundant grounding people associate with Article 517 — a metal wiring method that qualifies as an equipment grounding conductor plus an insulated copper equipment grounding conductor — is written into NEC 517.13 for Category 1 and Category 2 spaces; a Category 3 space does not automatically carry it, and that is a meaningful cost difference. A routine dental operatory commonly lands in Category 3, while sedation, oral surgery, or procedures where equipment applied to the patient could injure on failure push a room to Category 2. The governing body makes the determination with its designer and the AHJ, and we price to it. This is office-level Article 517, not the hospital essential electrical system with its life-safety, critical, and equipment branches — that scope is on our healthcare and institutional page.
That is the normal condition, and we plan for it. Containment and dust control go up at the suite line, filtration and negative pressure are used where the building or an infection-control risk assessment requires them, corridors and exit paths stay clear, and coring and other loud work is scheduled around the neighbors' patient hours. Our crews start at 6:00 a.m. and work through the early afternoon, which puts the disruptive work before most practices open. We are not a 24/7 emergency dispatcher and will not claim to be. Planned off-hours work is a different matter: a shutdown that touches a shared riser or the house panel, or any outage the building cannot take during patient hours, gets scheduled for a night or a weekend, coordinated with property management, and noticed to the other tenants in advance.
Both, on one contract. Practice-management workstations, digital sensor and chairside monitor drops, the server or network closet with conditioned power and cooling coordinated, wireless access points, paging or room-status signaling where a practice uses it, and camera and access-control rough-in at the safe, drug storage, and staff entrance. Running it with the power matters more in a medical suite than almost anywhere else, because the cable pathways, the operatory stub-ups, and the imaging circuits all compete for the same walls and the same short window before the finishes go in.
That is a load calculation, not a guess, and it is worth answering before you sign the equipment order. We look at the suite panel and its feeder, the connected load you already have, the nameplate data on what you are adding, and the spare capacity in the building's service. Sometimes the answer is a couple of new circuits; sometimes it is a subpanel in the equipment closet; occasionally it means the building's service has to grow, which pulls Tucson Electric Power or Trico into the schedule. Our in-house engineering runs the calculation and produces the drawings plan review will ask for.
We pull our own electrical permit and, where our mechanical scope applies, that one as well, working under your general contractor's building permit or holding the contract ourselves. Plan review runs through City of Tucson or Pima County depending on the building's location, and the rough and final inspection sequence is what actually gates your opening date. Some outpatient facility types also carry a state licensing or agency review on top of the building permit, so we ask early which category the practice falls into and sequence the work around whichever review is on the critical path.
The drivers, in roughly the order they move the number: the operatory or exam-room count and how many additional rooms you rough in for future growth; what the suite already has (a second-generation dental space with a usable panel and equipment closet prices very differently than a cold shell); the imaging package, since a CBCT with a dedicated circuit and a shielded room is a different scope than intraoral units alone; how the patient care spaces are classified, since Category 1 and Category 2 rooms carry the redundant wiring method and Category 3 rooms do not; whether the existing panel and building service can carry the load or have to grow; and how tightly the work has to phase around an occupied building. We do not price practices off a square-foot rule of thumb — send the floor plan and your equipment vendor's spec sheets and we will come back with a scoped, line-item bid.
Related Services
One contractor carries the whole scope. See every service we self-perform.
Essential electrical systems, standby power, and life-safety built to NEC 517, NFPA 99, and NFPA 110.
Safe-off and demo, panel changes, lighting, data, and fire-alarm coordination.
Structured cabling, access control, video surveillance, AV, and paging.
Interior, high-bay, exterior, and site lighting with controls and photometrics.
Send us the floor plan and your equipment vendor's spec sheets and rough-in templates. We'll scope the operatory power, the imaging circuits, the lighting, and the low-voltage together and come back with a line-item bid.
Request a Bid Call (520) 308-6235