Stored Electrical Energy

DOE-HDBK-1092-2004

Figure 2-6. Employers shall implement and document a lockout-tagout program with

procedures to safeguard employees from injury while working on or near deenergized

systems.

2.13.1.4

STORED ELECTRICAL ENERGY

Stored electrical energy that might endanger personnel shall be placed in a safe state.

Capacitors shall be discharged and high-capacitance elements shall be short-circuited and

grounded if the stored electrical energy could endanger personnel.

2.13.1.5

STORED NONELECTRICAL ENERGY

Stored nonelectrical energy in devices that could reenergize electric circuit parts shall be

blocked or relieved to the extent that the circuit parts could not be accidentally energized by the

device. Examples include wound springs and pneumatic-driven devices.

2.13.1.6

LOCKOUT/TAGOUT PROCEDURE

Each employer shall document and implement lockout/tagout procedures to safeguard

employees from injury while they are working on or near deenergized electric circuits and

equipment. The lockout/tagout procedures shall meet the requirement of NFPA 70E 120.2, 29

CFR 1910.147(c) to (f), 1910.269(d) and (m), 1910.333, and 1926.417. (See Figure 2-6.)

2.13.2 VERIFICATION OF DEENERGIZED CONDITION

Verification shall be made that all live circuits, parts, and other sources of electrical energy,

including mechanical energy, have been disconnected, released, or restrained.

A qualified worker shall operate the equipment operating controls, perform voltage verification,

and inspect open switches and draw out breakers to ensure that energy sources are isolated.

2.13.2.1

VOLTAGE VERIFICATION TEST

A qualified worker shall use appropriate test equipment to test the circuit elements and electrical

parts of equipment to which employees will be exposed and shall verify that the circuit elements

and equipment parts are deenergized. The test shall also determine if a hazardous energized

condition exists as a result of induced voltage or voltage back feed after specific parts of the

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