The single most important line on an electrical daily checklist is the one about proving the circuit dead, and it is routinely written too loosely. 29 CFR 1910.333(b)(2)(iv)(B) requires a qualified person to use test equipment to test the circuit elements and parts to which employees will be exposed and to verify they are de-energised. 1910.334(c)(2) then requires the test instrument itself to be checked for proper operation immediately before and immediately after the test. That is the live–dead–live sequence, and the reason it exists is that a meter with a blown fuse or a dead battery reads zero volts on an energised bus. Verifying with an unproved tester is not verification; it is a coin flip with a fatality on one side.
De-energising is the default, not a preference. 1910.333(a)(1) requires live parts to be de-energised before work unless the employer can demonstrate that de-energising introduces additional or increased hazards, or is infeasible due to equipment design or operational limitations. Schedule pressure, inconvenience and the customer not wanting the power off are not on that list, and an energised work permit is a record of the justification rather than a way around it. Only qualified persons may work on parts that have not been de-energised (1910.333(c)(2)), and "qualified" is a determination made per task and per piece of equipment — someone can be qualified on a panelboard and unqualified on the switchgear beside it.
On arc flash, this checklist is deliberate about what it cites. The arc flash boundary is the distance at which incident energy reaches 1.2 cal/cm², the accepted onset of a second-degree burn on bare skin, and it comes from NFPA 70E — a consensus standard, not an OSHA regulation. OSHA does not adopt 70E by reference; it reaches the same outcome through the PPE rules at 1910.132 and 1910.335(a) and, where those do not reach, the General Duty Clause. Saying "NFPA 70E requires" and "OSHA requires" as though they were the same sentence is common and it is wrong, so the item labels which is which. The fall-protection item does the same thing with the two trigger heights — 6 feet in construction under 1926.501(b)(1), 4 feet in general industry under 1910.28(b)(1)(i) — because an electrician moves between those two worlds week to week and a document that prints one of them is teaching half its readers the wrong number.