Electrical Preventive Maintenance: A Guide to NFPA 70B for Virginia Facilities

In a commercial or industrial facility, the electrical system is the backbone of the whole operation. When it fails, production stops, safety systems go dark and revenue disappears by the minute. Most of those failures give warning first: a connection running hot, a breaker that no longer trips on time, corrosion inside switchgear. A preventive maintenance program is how you hear that warning in time.

It has also stopped being optional in practice. Since 2023, NFPA 70B has been a standard rather than a recommendation, and insurers increasingly ask to see a maintenance program. This guide explains what an electrical preventive maintenance program includes, what NFPA 70B now expects, and how facilities across Central and Southside Virginia can put one in place without disrupting operations.

What Is an Electrical Preventive Maintenance Program?

An electrical preventive maintenance (EPM) program is a written, scheduled plan for inspecting, testing and servicing your electrical equipment before it fails. A good program does four things:

• Lists your equipment: switchgear, panelboards, transformers, motor control centers, disconnects, transfer switches, generators and critical circuits.
• Sets an interval for each item based on its condition, how critical it is and the environment it runs in.
• Says what is done on each visit, from visual inspection and infrared scans to torque checks, cleaning and testing.
• Keeps records, so you can show inspectors, insurers and auditors what was found and what was fixed.

Reactive maintenance, waiting until something breaks, almost always costs more. The repair bill is usually the smallest part of an outage. Lost production, idle labor, damaged equipment, spoiled inventory and safety exposure add up quickly.

NFPA 70B: From Recommended Practice to Standard

For decades, NFPA 70B was a recommended practice: good advice written with “should.” In January 2023, the National Fire Protection Association reissued it as the Standard for Electrical Equipment Maintenance, written with “shall.” The 2026 edition is now current.

What that means for a facility:

• A documented maintenance program is expected, with someone responsible for running it. A loose habit of “we look at the panels sometimes” no longer meets the standard.
• Intervals are based on condition. Equipment in poor condition, in a harsh environment or serving a critical load is maintained more often than clean, lightly loaded equipment.
• Maintenance and worker safety are linked. NFPA 70E, the workplace electrical safety standard, assumes equipment has been properly maintained when it assesses arc-flash risk. Poorly maintained gear changes that assessment.
• The 2026 edition allows permanently installed temperature monitoring to stand in for some periodic infrared scans, which helps facilities that cannot easily open equipment.

NFPA 70B is not automatically law. It becomes binding when a jurisdiction adopts it, a contract requires it or an insurer makes it a condition of coverage. That last one is increasingly common, which is why many facility managers first hear about 70B from their insurance carrier.

What a Maintenance Visit Includes

Every program is built around your equipment, but most include:

• Infrared (thermal) inspection of panels, breakers, bus and connections under load to find hot spots before they fail.
• Visual and mechanical inspection of switchgear and panelboards for loose connections, corrosion, moisture, dust and signs of arcing.
• Torque checks and cleaning on connections and enclosures, scheduled when equipment can be safely de-energized.
• Load readings to find overloaded or unbalanced circuits.
• Testing of breakers, GFCI protection and safety systems.
• Emergency and standby power checks: generators, transfer switches, and emergency and exit lighting.
• Arc-flash label review, confirming equipment is labeled and the labels still match the system.
• A written report with findings ranked by urgency and a plan for corrections.

How Often Should Electrical Equipment Be Maintained?

There is no single interval that fits every facility, and NFPA 70B doesn’t pretend there is. The schedule depends on:

• Condition: older equipment, or equipment with past problems, needs more attention.
• Criticality: what stops if this piece of equipment fails?
• Environment: dust, moisture, heat, vibration and corrosive air all shorten intervals. Manufacturing plants, woodworking shops and agricultural buildings are harder on equipment than an office.
• Manufacturer recommendations for the specific gear.

For many facilities, infrared scanning and visual inspection happen at least once a year, and deeper de-energized maintenance happens on a longer cycle planned around shutdowns. We’ll recommend intervals for each piece of equipment after the first assessment.

The Business Case

• Less unplanned downtime. Problems are found on your schedule, not during a production run.
• Longer equipment life. Clean, tight, properly loaded equipment simply lasts longer.
• Safer workers. Well-maintained gear behaves predictably, which is what arc-flash protection depends on.
• Better standing with insurers and inspectors. Written records show due diligence and can help at renewal time.
• Budgeting instead of emergencies. A ranked findings list lets you plan corrections into next year’s budget.

Want to reduce the risk of unplanned downtime? Book your visit on our booking page and a licensed Progress and Heritage electrician will take it from here.

Frequently Asked Questions

Is NFPA 70B required by law in Virginia?

Not on its own. Virginia’s building and fire codes do not adopt NFPA 70B directly. It becomes a requirement when your insurer, a customer contract or a corporate policy calls for it. Even where it isn’t required, it is the accepted benchmark for what reasonable electrical maintenance looks like.

Do you have to shut down the facility for maintenance?

Not for everything. Infrared scans and many inspections are done while equipment is running, which is the only way to see a hot connection. De-energized work, such as torque checks and internal cleaning, is scheduled around your planned shutdowns, nights or weekends.

What does a preventive maintenance program cost?

It depends on how much equipment you have, its condition and how often it needs attention. We start with an assessment of your equipment and give you a written scope and price before any program begins.

We already have a facilities team. Do we still need an electrical contractor?

Often your team handles the day-to-day, and we handle work that needs licensed electricians, thermal imaging equipment or arc-flash precautions. We can also help set up the program and records so your team can keep it running.

Why Facilities Across Central Virginia Partner with Progress and Heritage

We build maintenance programs around your operation: your equipment, your uptime requirements and your budget. Our licensed, insured Class A electrical contractors serve commercial and industrial facilities in Lynchburg, Roanoke, Salem, Danville and Martinsville and the surrounding counties.

• Equipment surveys and written schedules built around NFPA 70B
• Infrared inspections and detailed reports you can hand to your insurer
• Corrections scheduled around your shutdowns to keep disruption low
• Background-checked, safety-focused technicians

Learn more about our service, maintenance and compliance work, or read our guide to commercial electrical code compliance in Virginia.