Inspection & Testing Frequencies

There is a difference between having an interval and being able to defend one, and NFPA 70B now cares about both.

This is the heaviest domain in the REALTIMEais 70B READINESS SCORE — 20 of 100 points — because the interval decision drives everything downstream: the labor plan, the shutdown schedule, the budget, the backlog. An interval you cannot justify doesn’t just cost points here. It invalidates the entire program built on top of it. If the foundation number is arbitrary, everything resting on it is arbitrary too.

The standard agrees. Chapter 9 of the 2026 edition is where intervals live, and they are no longer flat numbers. They are set by equipment condition — Condition 1, 2, or 3. Assess the equipment, and the assessed condition sets the clock; a Condition 3 breaker is on a shorter leash than a Condition 1 breaker, and the standard says so in a table. Section 9.2.2 covers the case everyone actually lives in: what to do when the manufacturer’s recommendation isn’t available. The answer is not “annual, because annual.” And Section 4.2.2.2 closes the loop: maintenance tasks are required to be based on inspection results. What you find is supposed to change what you do next. The interval has to be justified, not inherited.

The domain measures three things: whether intervals exist, whether they are justified, and whether they are actually met. Most facilities clear the first bar. The score separates on the second and third. Six criteria:

1. Intervals are established for each equipment class — switchgear, transformers, panels, protective devices, each with its own clock.
2. The interval basis is documented: condition, criticality, manufacturer guidance, or a standard reference such as the Chapter 9 tables. The basis is the difference between an engineering decision and a habit.
3. Deviations from established intervals are documented and justified. Deferrals happen; the question is whether the deferral is a recorded decision or a silent gap.
4. Actual completion is tracked against the scheduled interval. An interval you don’t measure against is a wish.
5. Overdue items are visible and escalated — seen without someone going looking, and acknowledged by someone with authority.
6. Interval decisions are revisited when condition or criticality changes. A breaker that just moved to Condition 3 should not still be on its Condition 1 schedule.

What good looks like: every equipment class has an interval, and every interval has a documented reason. When a shutdown gets deferred — because it will — the deferral is a recorded decision with a justification and a new date. An auditor asks “why thirty-six months on this switchgear?” and the answer is on paper before they finish the question.

What this domain is worth

This is the money domain, so talk money. The cost of the gap runs both directions. Over-maintenance: shutdowns, labor, and contractor fees spent opening healthy gear because the calendar said so. Under-maintenance: failures on gear whose clock was too long — outage, overtime, emergency parts at emergency prices. And without a documented basis, there is no way to resist either mistake when the budget conversation comes. The return: Condition 1 gear earns longer intervals — fewer shutdowns, same reliability, real money off the labor line. Condition 3 gear gets a shorter leash before it becomes an outage. And a documented basis is the only defense a maintenance budget has when someone upstairs asks why it’s needed. The interval is the single largest line item in your maintenance budget. Justified intervals are how you stop paying for both mistakes.

The failure mode is everywhere: intervals inherited from a previous era that nobody can source. “We’ve always done it annually” is not a basis. It’s an heirloom. I once asked a facility why their main switchgear was on a twelve-month cycle. It took three weeks to get an answer, and the trail led to a letter from an insurance carrier they hadn’t used in over twenty years — a letter nobody could produce anymore. Twenty-plus years of shutdowns, labor, and budget rested on a document that no longer existed, written by a company they no longer paid. For some of that equipment, twelve months was too long. For the rest it was money down the drain. Nobody knew which was which, because nobody had ever connected the interval to the condition of the equipment. This domain protects you from both directions: missing maintenance and unjustifiable maintenance.

Three questions to ask your program this month:

• Can we produce the basis for the interval on our most critical switchgear? Not remember it — produce it.
• What percentage of scheduled inspections were completed on time last year? If nobody can name a number, the answer is the problem.
• When we deferred something, did we write down why? Deferrals are legitimate. Undocumented deferrals are findings.

Send one to your maintenance lead today. The answer is the diagnostic — and so is the silence. The full REALTIMEais 70B READINESS SCORE assessment is free at REALTIMEais.com/readiness, scored in REALTIMEais, The Electrical Intelligence System™.

LinkedIn teaser

“Why is your main switchgear on a 12-month cycle?”

It took the facility three weeks to answer. The trail ended at a letter from an insurance carrier they hadn’t used in 20 years — a letter nobody could find.

Two decades of shutdowns, labor, and budget, resting on a document that no longer existed.

“We’ve always done it annually” is not a basis. It’s an heirloom.

NFPA 70B now sets intervals by equipment condition, not by habit — and Sec. 4.2.2.2 requires what you find to change what you do next.

The money: the interval is the largest line item in your maintenance budget, and an unjustified one costs you in both directions — shutdowns you didn’t need on healthy gear, and failures on gear whose clock was too long. Condition 1 gear earns longer intervals. Condition 3 gear gets a shorter leash. A documented basis is the only defense that budget has.

Part 2 of the REALTIMEais 70B READINESS SCORE series: Inspection & Testing Frequencies — 20% of your score, the heaviest domain on the board.

One question for your maintenance lead today: can we produce the basis for the interval on our most critical gear? Not remember it. Produce it.

Free assessment: REALTIMEais.com/readiness — The Electrical Intelligence System™

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