Commercial Electrical Maintenance FAQ
Preventive electrical maintenance keeps your commercial building safe, reduces unplanned downtime, and extends the life of your electrical systems. This FAQ covers maintenance scheduling, what inspections include, thermal imaging, code recommendations, and how a maintenance program protects your business and your insurance coverage.
For details on our maintenance programs, visit our commercial electrical maintenance page.
Scheduling and Frequency
How often should commercial electrical maintenance be scheduled?
Most commercial buildings should have a comprehensive electrical inspection annually, with quarterly checks for high-use or critical facilities. NFPA 70B recommends a risk-based approach - buildings with older equipment, high electrical loads, or critical operations (data centers, healthcare, manufacturing) need more frequent maintenance. At minimum, schedule a full inspection once per year and address any findings promptly.
What is the difference between preventive and predictive maintenance?
Preventive maintenance follows a fixed schedule - inspections, cleaning, tightening, and testing at regular intervals regardless of equipment condition. Predictive maintenance uses diagnostic tools like thermal imaging and power quality analysis to detect problems before they cause failures. The best programs combine both: scheduled preventive tasks plus predictive diagnostics that identify developing issues. Predictive maintenance reduces costs by focusing attention where it is actually needed.
What happens if we skip electrical maintenance?
Skipping maintenance leads to undetected loose connections, worn components, and degraded insulation that can cause arc faults, equipment failure, or electrical fires. Insurance companies may deny claims if you cannot demonstrate a maintenance history. OSHA citations for electrical hazards carry fines of $16,000+ per violation. The cost of one unplanned emergency call or insurance claim denial far exceeds years of maintenance contract costs.
What Maintenance Includes
What is included in a commercial electrical maintenance visit?
A comprehensive maintenance visit includes: visual inspection of panels, disconnects, and junction boxes; torque verification on all connections; breaker testing and operation; infrared thermal scanning of panels and feeders; ground fault testing; emergency lighting and exit sign testing; inspection of surge protection devices; documentation of all findings; and a prioritized report with recommended actions. Specific additional checks depend on your building’s equipment.
What is thermal imaging, and why is it used for electrical inspections?
Thermal imaging (infrared scanning) uses a specialized camera to detect heat patterns in electrical equipment. Loose connections, overloaded circuits, and failing components generate excess heat before they cause visible damage or failure. An infrared scan can identify a loose breaker connection at 180 degrees F that looks perfectly normal to the naked eye. This is the single most effective predictive maintenance tool for commercial electrical systems.
What is infrared scanning, and how often should it be done?
Infrared scanning is the practical application of thermal imaging during an electrical inspection. NFPA 70B recommends annual infrared scanning of all panels, switchgear, disconnects, and motor control centers. High-criticality facilities should scan semi-annually or quarterly. Each scan is documented with thermal images and temperature readings, creating a baseline for comparison over time. Developing hot spots are caught early, before they become failures.
What common issues are found during maintenance inspections?
The most frequent findings include: loose connections (the number one cause of electrical fires), tripped or failed GFCI devices, burnt or discolored wiring, missing panel cover screws or knockouts, improperly labeled circuits, failed emergency lighting batteries, corroded connections in exterior equipment, overloaded circuits, missing arc flash labels, and code violations from previous work done without permits.
Safety and Compliance
What is NFPA 70B, and does it apply to my building?
NFPA 70B (Standard for Electrical Equipment Maintenance) provides recommended practices for maintaining electrical equipment in commercial and industrial facilities. While not a law in itself, NFPA 70B is referenced by insurance companies, OSHA, and building codes as the standard of care. Following NFPA 70B demonstrates due diligence and can protect you in liability situations. The 2023 edition was upgraded from a “recommended practice” to a full “standard,” signaling stronger enforcement expectations.
What is arc flash risk, and how does maintenance reduce it?
Arc flash is an explosive release of energy caused by an electrical fault, capable of generating temperatures up to 35,000 degrees F. It causes severe burns, blast injuries, and fatalities. Regular maintenance reduces arc flash risk by identifying and correcting loose connections, degraded insulation, and equipment faults before they cause arcing. An arc flash risk assessment, required by NFPA 70E, determines the incident energy levels at each piece of equipment and dictates the required personal protective equipment (PPE). Visit our compliance and safety page for arc flash assessment services.
What are the OSHA requirements for commercial electrical maintenance?
OSHA requires employers to maintain electrical equipment in a safe condition (29 CFR 1910 Subpart S). This includes keeping equipment free of recognized hazards, maintaining proper clearances around electrical panels (36 inches minimum), ensuring all equipment is properly labeled, and providing arc flash PPE based on a current assessment. OSHA does not prescribe a specific maintenance schedule, but they enforce the standard of care established by NFPA 70B and 70E.
Does electrical maintenance affect my insurance coverage?
Yes. Many commercial property insurance policies require evidence of electrical maintenance, and some specifically require annual infrared scanning. Claims related to electrical failures may be denied or reduced if you cannot produce maintenance records. Conversely, a documented maintenance program can qualify you for premium discounts with some carriers. Keep all maintenance reports on file for at least 5 years.
Breaker and Equipment Testing
What does breaker testing involve?
Breaker testing verifies that circuit breakers will trip at their rated current and within the required time frame. This includes insulation resistance testing, contact resistance testing, and trip testing. Breakers that fail to trip during testing are replaced immediately - a breaker that does not trip during a fault is a fire and safety hazard. NFPA 70B recommends breaker testing every 3 to 5 years for low-voltage breakers.
What documentation is required for electrical maintenance?
Proper documentation includes: date and scope of each inspection, all findings with severity ratings, thermal images with temperature readings, test results for breakers and protective devices, emergency lighting test logs, corrective actions taken, and recommendations for future work. This documentation serves as evidence of due diligence for insurance, OSHA compliance, and property management records. We provide detailed reports after every maintenance visit.
Maintenance Contracts
How much does a commercial electrical maintenance contract cost?
Maintenance contract costs vary based on building size, equipment complexity, and visit frequency. Most commercial buildings pay $1,500 to $5,000 annually for a comprehensive maintenance program that includes 1 to 4 scheduled visits, thermal imaging, emergency lighting testing, and detailed reporting. Larger facilities with switchgear, multiple panels, and generators pay $5,000 to $15,000+. The cost is a fraction of what a single emergency failure or insurance claim denial costs.
What is the difference between emergency and scheduled maintenance?
Scheduled maintenance is planned in advance, performed during business hours or after hours by agreement, and follows a systematic checklist. Emergency maintenance responds to an immediate problem - a tripped main breaker, burning smell, power loss, or equipment failure. Emergency calls are prioritized by severity and typically carry after-hours rates. A good maintenance program reduces emergency calls by catching problems before they cause failures.
Do you offer fast-response commercial electrical service?
Yes. Electrical Support Company provides fast-response commercial electrical service for commercial clients. Maintenance contract clients receive priority response and preferred rates for emergency calls. Non-contract emergency calls are handled on a first-available basis. For electrical emergencies, call (425) 583-4869 immediately. Learn more about our emergency electrical services.
Getting Started
How do I know if my building needs a maintenance program?
If your building has electrical panels, lighting, HVAC systems, or any powered equipment - and virtually all commercial buildings do - you benefit from a maintenance program. Buildings that especially need maintenance include those over 10 years old, buildings with high electrical loads, facilities that have had previous electrical issues, and any building where an outage impacts revenue or safety.
What should I expect from the first maintenance visit?
The first visit establishes a baseline condition assessment of your entire electrical system. We document panel conditions, take thermal images, test all protective devices, verify emergency lighting, check for code violations, and produce a comprehensive report with prioritized recommendations. This baseline becomes the reference point for tracking your system’s condition over time.
Next Steps
Protect your building and your business with a proactive electrical maintenance program. Electrical Support Company offers customized maintenance contracts for commercial buildings throughout the Seattle-Lynnwood area.
Call (425) 583-4869 or contact us online to schedule your baseline electrical assessment.
Browse all of our commercial electrical services to see how we support commercial properties at every stage.