30-Day Load Study
30-Day Electrical Load Study – Phoenix, AZ
A 30-day electrical load study tracks your Phoenix facility’s actual electrical demand continuously over an entire month, capturing peak demand, daily cycles, weekend vs. weekday patterns, and load variations that single-day measurements or calculations can’t reveal. Phoenix Contracting Services installs non-invasive monitoring equipment on your electrical panels to record amperage, voltage, power factor, and demand patterns every few seconds for 30 days, then delivers a detailed NFPA 70B-compliant report showing exactly how your system performs under real operating conditions.
This comprehensive data is critical when planning panel upgrades, adding equipment, expanding operations, or satisfying insurance carrier requirements. Unlike shorter studies or paper calculations, 30-day monitoring captures your facility’s complete operational range, including production cycles, seasonal variations, special events, and both typical and peak loading scenarios. Insurance carriers and engineers prefer 30-day studies because they provide real-world evidence rather than theoretical estimates, and NFPA 70B guidelines specifically recommend a 30-day minimum monitoring duration for electrical system assessments.
When You Need a 30-Day Load Study
- Your insurance carrier requires 30-day load documentation before approving panel upgrades, service expansions, or policy renewal
- You’re adding significant equipment (production machinery, HVAC, data center capacity) and need to verify your electrical service can handle the increased demand
- An engineer or authority having jurisdiction (AHJ) has requested actual 30-day demand data for permit applications or code compliance review
- You’re experiencing intermittent electrical problems that only occur under specific loading conditions, requiring extended monitoring to capture
- You need to size backup generators, UPS systems, or emergency power sources accurately based on actual peak demand
- Your facility has variable operations (multiple shifts, production campaigns, seasonal patterns) requiring comprehensive monitoring to capture all scenarios
- You’re planning major electrical service upgrades and want accurate data to avoid over-sizing or under-sizing your investment
- NFPA 70B compliance programs require a documented electrical load analysis with continuous monitoring duration
What You Get from Our 30-Day Load Study
Continuous 30-Day Monitoring
We install clamp-on current sensors that record your facility’s electrical usage continuously for 30 days without requiring any power shutdowns or interruptions. Monitoring equipment captures amperage, voltage, and power factor measurements every few seconds, creating a complete picture of your electrical system’s behavior across all operating conditions, production schedules, and time periods.
Peak Demand Analysis & Identification
Our reports identify when your facility draws maximum power, how often peak demand occurs, what conditions create peak loading, and whether peaks are sustained or momentary. This analysis helps determine if your existing electrical infrastructure can handle peak loads safely or if upgrades are necessary to prevent overloading and maintain adequate safety margins.
Load Trending & Pattern Analysis
Detailed demand graphs show daily, weekly, and monthly usage patterns including weekday vs. weekend differences, shift-to-shift variations, production cycle impacts, and seasonal influences. Visual trending data helps facility managers understand electrical consumption patterns, identify opportunities for load leveling, and plan equipment additions or operational changes.
Voltage Analysis & Power Factor Measurements
We measure and document voltage levels throughout the monitoring period, flagging any voltage sags, swells, or variations that could damage equipment or indicate system problems. Power factor measurements show how efficiently your facility uses electrical power and identify opportunities for power factor correction that can reduce utility demand charges and improve system capacity.
NEC & NFPA 70B Compliance Documentation
All reports include calculations and documentation formatted to meet NEC Article 220 requirements and NFPA 70B maintenance standards. Our reports satisfy insurance carrier requirements, support permit applications, and provide the technical documentation engineers and code officials expect for approval of electrical system modifications or expansions.
Professional Report Delivery
You’ll receive a comprehensive PDF report within 5-7 business days after monitoring completion including executive summary, detailed demand graphs, voltage and power factor analysis, load duration curves, comparison to existing equipment ratings, and specific prioritized recommendations for any needed upgrades or corrections. Reports typically include 15-30 pages of analysis, graphs, and technical data formatted for insurance carriers, consulting engineers, and facility management decision-making.
How Our Load Study Process Works
Our 30-day load study process is designed for minimal disruption to your Phoenix facility operations. We coordinate a convenient time for equipment installation (typically 1-2 hours), install clamp-on sensors and recording equipment without requiring any power interruptions, verify equipment is recording properly, and leave monitoring in place for exactly 30 days. During monitoring, equipment operates completely unattended, requiring no interaction from your staff. After 30 days, we return to remove equipment (1-2 hours), download and analyze all recorded data, prepare a comprehensive report with findings and recommendations, and deliver final documentation within 5-7 business days.
A Phoenix distribution center needed to add refrigeration equipment, but its insurance carrier required 30-day load documentation before approval. Our monitoring showed peak demand at 520A on their 800A service—adequate capacity with proper safety margin. The facility avoided a $60,000 service upgrade, satisfied insurance requirements with our NFPA 70B-compliant report, and received approval within 48 hours of submitting our documentation. The total project duration was 6 weeks from initial contact to insurance approval.
Our 30-day load studies support related services, including NEC load calculations, power quality analysis, and panel upgrades when monitoring reveals capacity or condition issues requiring correction.
Contact us at (602) 564-1144 for a custom quote based on your specific requirements.
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Frequently Asked Questions
Frequently Asked Questions
Why 30 days? Can you do shorter studies?
30 days captures complete operational cycles, including weekly patterns, monthly variations, and seasonal influences, with most insurance carriers and NFPA 70B guidelines specifying 30-day minimum duration. Shorter studies (7-14 days) are possible for specific troubleshooting or faster results, but they may not capture your facility’s full range of operating conditions, so we recommend 30-day studies for insurance requirements, major capital projects, and compliance documentation.
Will the monitoring equipment disrupt our operations?
No, load study equipment is completely non-invasive using clamp-on current sensors that attach around conductors without requiring any power shutdowns or interruptions. The monitoring recorder is typically mounted in or near your electrical room and requires only a standard 120V outlet for power, with installation taking 1-2 hours, and most facilities forget the equipment is there after the first day, with no impact on electrical system operation.
What happens if our operations change during the monitoring period?
Changes during monitoring actually provide valuable data—if you shut down for holidays, run special production campaigns, or experience unusual events, we note these in the report context. The goal is to capture typical operations, and if something unusual happens, we can often extend monitoring or schedule a follow-up study, with facilities having highly variable operations sometimes needing monitoring during both peak and low seasons to capture the full operational range.
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