Professional Commercial Electrical Estimating for Tucson Projects
Tucson contractors specialize in defense aerospace facilities, University of Arizona research complexes, and Dark Sky compliant commercial lighting.
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2020 NEC with City of Tucson Planning and Development Services amendments and Pima County Outdoor Lighting Code (Dark Sky).
Tucson electrical projects operate under the 2020 NEC and TEP utility rules. Estimators must carry strict Pima County Outdoor Lighting Code (Dark Sky) certified fixtures, extreme desert heat deratings, and caliche rock excavation. Our team delivers exact CSI MasterFormat takeoffs incorporating local labor benchmarks.
Open-shop dominant ($28-$48/hr) with IBEW Local 570 active on defense aerospace, University of Arizona, and civic projects.
📝 Estimator's Field Note
"The most common scope gap I find in plan reviews is the coordination between the electrical contractor's work and the low-voltage systems. When the data, security, and AV systems are designed by separate consultants, there are almost always overlaps or gaps in the raceway and power requirements."
🔍 Scope Gap Warning
Watch for the fire alarm and security systems scope gap. Many commercial plans show fire alarm on the electrical drawings but reference separate specifications that the electrical contractor may or may not be carrying.
Quick Reference
- NEC 220 — Load Calculations
- NEC 700 — Emergency Systems
- CSI 26 05 00 — Common Electrical
- NFPA 110 — Gen Set Testing
Local Cost Factors
Contractor Challenges in Tucson
TEP service entrance coordination; meeting strict outdoor photometric shielding mandates.
Detailing defense contractor specifications and specialized optical research laboratory power.
⚠ Bid-Day Risk Factor
Material price escalation clauses are becoming standard in longer-duration projects. We recommend including a 5-8% annual escalation factor for projects spanning more than 12 months.
| CSI Division | Description | Quantity | Unit | Unit Price | Total |
|---|---|---|---|---|---|
| 26 05 13 | Medium-Voltage Cable (15kV) | 2,400 | LF | $14.50 | $34,800 |
| 26 24 13 | Distribution Switchboard 4000A | 1 | EA | $48,200 | $48,200 |
| 26 24 16 | Panelboard 277/480V 400A | 12 | EA | $3,850 | $46,200 |
| 26 27 26 | Wiring Devices (Commercial Grade) | 520 | EA | $18.50 | $9,620 |
| 26 05 33 | Raceway & Boxes (EMT) | 8,400 | LF | $6.80 | $57,120 |
| Material Subtotal | $195,940 | ||||
📦 Coordination Note from Our Team
Coordinate with the GC on the electrical room rough-in sequence. The concrete floor in the electrical room should be poured and cured before switchgear delivery, but the conduits entering the slab need to be stubbed up before the pour.
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CSI MasterFormat Division 26 (Electrical) covers the complete electrical scope. We organize all takeoffs by MasterFormat numbers — 26 05 00 (Common Work Results for Electrical), 26 22 00 (Low-Voltage Transformers), 26 24 00 (Switchboards and Panelboards), and 26 27 26 (Wiring Devices).
Industry Standard
NEC Article 220 (Branch-Circuit, Feeder, and Service Load Calculations) governs all commercial load calculations. Understanding the demand factors in Table 220.42 for lighting loads and Table 220.44 for receptacle loads is essential for accurate commercial estimating.
Frequently Asked Questions
How do you handle Pima County Dark Sky outdoor lighting requirements in Tucson estimates?
We verify that all exterior luminaires feature full-cutoff optics, compliant color temperatures (under 3000K), and required automatic dimming controls.
What is your turnaround for Tucson electrical estimates?
Standard commercial and residential takeoffs are delivered within 24 to 48 hours in CSI MasterFormat.
Tucson is part of our Arizona electrical estimating coverage. View all cities and services available statewide.