Is this a split-bus panel?

Yep, such is the case in my house. The “main” sticker is actually deadly IMO because all of the high voltage crap is still live.

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The use of the word main is something that is often misused. The NEC requires that a service disconnect actually be labeled to somehow indicate that it is a “service disconnect”.

Part VI. Service Equipment — Disconnecting Means
230.70 General. Means shall be provided to disconnect all conductors in a building or other structure from the service-entrance conductors.
(B) Marking. Each service disconnect shall be permanently marked to identify it as a service disconnect.


I use “Main Service Disconnect” (is located …). Homeowners want to talk about the main breaker; this covers all bases.

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