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ESS and battery labeling

Article 706 covers permanently installed energy storage. Most of it is not about labels — and the clauses that are, point at a plaque listing every power source on the building rather than at the battery itself.

The label Article 706 actually asks for

706.11(A) is the one that matters on a normal grid-tied install with storage: a permanent plaque or directory denoting all electric power sources on or in the premises, installed at each service-equipment location. Markings follow 110.21(B).

Not a battery label. A premises label, listing the battery alongside everything else that can energise the building.

706.11(B) — stand-alone buildings

Where the ESS building is not utility-connected, the plaque or directory goes on the exterior, at a readily visible location.

What 706 does not make you label

Five clauses commonly cited at inspection produce no installer-applied marking:

  • 706.1 — scope. Defines what Article 706 covers.
  • 706.2 — definitions.
  • 706.10(D) — ESS-room doors must open in the direction of egress with listed panic hardware. A door requirement, not a placard.
  • 706.21(D) — a listed and labelled current-limiting overcurrent device adjacent to the battery. The labelling is the manufacturer's, on the device.
  • 706.32 — flexible cables 2/0 AWG and larger inside the battery enclosure. Wiring, not marking.
Three of those five say "labelled" somewhere in the clause and still need nothing from you — because the labelling is part of the product listing. Reading the word "labeled" as "supply a placard" is the common error here.

What else fires on a storage job

A battery rarely triggers 706 alone. The same install usually pulls in disconnect marking under 690.13 and 690.15, interconnection marking under 705.12, and — if the array has rapid shutdown — the labels in 690.12 and 690.56(C).

What we stock against it

537 of our products map to Article 706 clauses: 343 to 706.21, 170 to 706.11 and 24 to 706.15.

For Kev. All clause behaviour above is from NecSignageRule, including which clauses carry requires_sign=False, and the SKU counts are from NecSkuMapping. The note about "labeled" being misread is my inference from the data rather than something the data states — worth keeping only if you agree it is true in the field.