OSHA 29 CFR 1910.147 requires documented energy control before servicing equipment where unexpected startup could injure a worker. On residential and light-commercial jobs this most often means an electrical disconnect, a gas valve, or stored pressure in a refrigerant circuit.
Wisconsin is one of our code-tuned states, so the packet builder also flags the state-specific attachments this scope triggers before you file.
One page: what a Wisconsin building department checks on this document, and the attachments that most often hold up issuance.
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General guidance for Wisconsin contractors, not legal advice. Confirm requirements with the authority having jurisdiction before filing.