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The 2026 revision of NFPA 70B expands the scope of electrical maintenance by broadening the focus beyond traditional time‑based activities to include condition‑based maintenance and design strategies that eliminate exposure to hazards during maintenance-related activities.
Eaton Exertherm Continuous Thermal Monitoring (CTM) solutions help organizations comply with the standard’s requirements while improving safety, reliability, and maintenance decision‑making.
NFPA 70B has transitioned from a recommended practice into an enforceable standard, introducing mandatory “shall” language for electrical maintenance programs (EMPs). The 2026 edition builds on this foundation by expanding the scope of maintenance to explicitly include preventive, predictive, and corrective maintenance, reinforcing the role of data‑driven, condition‑based strategies.
A central theme of NFPA 70B‑2026 is reducing risk by design. The standard strengthens expectations that equipment owners evaluate design options that eliminate exposure to hazards during maintenance‑related activities, rather than relying solely on procedures and personal protective equipment (PPE).
NFPA 70B‑2026 updates Section 7.4 (Infrared Thermography) to recognize that permanently installed, continuously monitoring temperature measurement devices may be used to satisfy traditional thermographic inspection requirements.
NFPA 70B (2026) 7.4.5
“Continuously monitoring, permanently installed temperature measurement devices shall be permitted to satisfy 7.4.1 through 7.4.4.”
This change formally acknowledges that Continuous Thermal Monitoring (CTM) can meet or exceed the intent of periodic infrared thermography by capturing real‑time, transient, and load‑dependent thermal conditions that scheduled inspections may miss.
“Where a recognized hazard presents an increased risk during maintenance, a study to determine design options that can eliminate exposure to hazards or reduce risk during maintenance‑related activities shall be conducted.”
The 2026 revision shifts the focus from simply reducing risk to deliberately evaluating whether exposure to hazards can be eliminated altogether. This aligns NFPA 70B with the hierarchy of risk controls used throughout NFPA 70E, where elimination and engineering controls are prioritized over administrative controls and PPE.
Continuous Thermal Monitoring (CTM) supports this requirement by transforming how thermal inspections are performed. Instead of routine, manual interaction with energized equipment, permanently installed sensors enable remote, continuous condition monitoring, reducing or eliminating routine exposure during inspection activities.
Permanently installed thermal sensors provide continuous, real‑time temperature data without requiring routine access to energized equipment. This approach supports the highest practical level of risk control by eliminating routine exposure during inspection activities and enabling predictive, condition‑based maintenance.
Infrared windows are an engineering control that reduces risk by allowing line‑of‑sight inspections without removing equipment covers. While exposure is reduced, inspections remain periodic and dependent on scheduled activities.
Manual infrared inspections typically require the removal of covers, energized access, and the presence of qualified personnel using administrative controls and PPE. However, this exposure‑based approach only provides a snapshot in time, and may miss intermittent or rapidly developing conditions.
| Attribute | Continuous Thermal Monitoring (CTM) | Thermographic (IR) Windows | Traditional Infrared (IR) Thermography |
| NFPA 70B (2026) Alignment | Explicitly permitted under 7.4.5 as a continuously monitoring, permanently installed temperature measurement device | Supported through Annex A.7.4.2 as an engineering control to reduce cover removal | Long-standing method referenced in 7.4, performed as periodic inspections |
| Maintenance-RelatedDesign (§6.8) | Supports design options that eliminate routine exposure to energized equipment during inspection activities | Reduces exposure but does not eliminate the need for energized inspections | Relies on exposure-based inspections managed through procedures and PPE |
| Hierarchy of Risk Controls | Eliminates routine exposure by design (highest practical level for inspection tasks) | Engineering control that reduces exposure | Administrative controls and PPE are primary safeguards |
| Worker Interaction with Energized Equipment | No routine interaction required for data collection | Reduced interaction; still requires presence near energized equipment | Direct interaction required; covers often removed |
| Inspection Frequency | Continuous, 24/7 monitoring | Periodic, scheduled inspections | Periodic, scheduled inspections |
| Data Type | Real-time and trended temperature data | Snapshot data at inspection intervals | Snapshot data at inspection intervals |
| Ability to Detect Transient or Load-Dependent Conditions | High – captures intermittent and rapidly developing issues | Limited to inspection timing and loading conditions | Limited to inspection timing and loading conditions |
| Maintenance Strategy Supported | Condition-based and predictive maintenance | Time-based maintenance with improved safety | Time-based maintenance |
| Reliance on PPE and Procedures | Secondary or minimized | Reduced but still required | Primary risk-control method |
| Documentation & Trending | Automated, continuous records that support EMP documentation and analysis | Manual documentation per inspection | Manual documentation per inspection |
| Overall Risk Profile | Lowest exposure risk for routine thermal condition assessment | Reduced exposure compared to traditional IR | Highest exposure risk for routine inspections |
NFPA 70B (2026) reinforces that Electrical Maintenance Programs must be living systems supported by data, documentation, and continuous improvement. Continuous Thermal Monitoring contributes directly to these objectives by providing:
Eaton Exertherm thermal sensors provide an advanced alternative to infrared thermography survey that provides real-time temperature monitoring of mission critical electrical assets. Unlike traditional periodic thermographic inspections, CTM offers permanently mounted thermal sensors that meet the requirement of NFPA 70B with 24x7 surveillance on the health of electrical assets, enabling early detection of potential electrical faults before they occur.
Eaton Exertherm CTM technology complies with the operational and safety standard set by NFPA 70B by providing a proactive approach to compliance maintenance through the following features:
Eaton Exertherm Continuous Thermal Monitoring (CTM) solutions track and monitor crucial temperature differences (ΔT) between:
This ongoing differential analysis meets with NFPA 70B guidelines that emphasize temperature variances as key indicators of potential issues. By measuring these differences continuously rather than through periodic checks, engineers gain deeper insights into their electrical systems thermal patterns.
Traditional infrared inspection methods often face challenges with component accessibility. Eaton Exertherm CTM technology eliminates these barriers by:
This uninterrupted visibility ensures that thermal anomalies are detected promptly, fully satisfying the accessibility requirements outlined in NFPA 70B.
NFPA 70B places significant emphasis on thorough documentation practices. CTM solutions deliver exceptional value in this area by:
This extensive documentation empowers engineers to make informed decisions about maintenance priorities based on actual performance data.
Accurate thermal assessment requires proper loading conditions, as specified in NFPA 70B. CTM technology addresses this by:
NFPA 70B recommends maintaining historical records for comparative analysis. CTM solutions comply with the standard by:
When evaluating CTM solutions for NFPA 70B compliance, engineers should consider:
For organizations committed to maintaining safe, reliable systems, Continuous Thermal Monitoring represents a technological advancement that not only meets but exceeds NFPA 70B standards for electrical equipment maintenance. By implementing CTM technology, engineers gain a proactive approach to system health that transforms maintenance from reactive to predictive.
Eaton Exertherm Continuous Thermal Monitoring (CTM) aligns with the direction of NFPA 70B (2026) by helping organizations evaluate and implement design‑based solutions that reduce maintenance risk at its source. CTM is comprehensive in its reach and functionality, ensuring compliance with maintenance regulatory standards across multiple power distribution sectors and industries. By minimizing the need for routine energized access, CTM supports safer maintenance practices and provides several benefits like intelligent monitoring measures that organizations can leverage to enhance safety, improve operational efficiency, and ensure compliance with both electrical safety standards and operational excellence.
The result is a maintenance strategy that is:
Learn how Eaton Exertherm Continuous Thermal Monitoring (CTM) can help modernize your electrical maintenance program and support compliance with NFPA 70B (2026).
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