6.1 Energy Control Program & Authorized vs. Affected Employee Roles

6.1 Energy Control Program & Authorized vs. Affected Employee Roles

Regulatory Scope and Mandate of 29 CFR 1910.147

OSHA's standard for the Control of Hazardous Energy (Lockout/Tagout), codified at 29 CFR 1910.147, covers the servicing and maintenance of machines and equipment in general industry where the unexpected energization, start-up, or release of stored energy could cause serious physical harm or death to employees. According to OSHA estimates, compliance with the Lockout/Tagout (LOTO) standard prevents approximately 120 fatalities and 50,000 workplace injuries each year in the United States.

Servicing and maintenance activities include workplace tasks such as constructing, installing, setting up, adjusting, inspecting, modifying, maintaining, cleaning, lubricating, clearing jams, and servicing machines or equipment.

---

Statutory Exclusions and Boundary Preemption

Paragraph 1910.147(a)(1)(ii) explicitly delineates statutory exclusions where the general industry LOTO standard does not apply:

1. Construction, Agriculture, and Maritime Employment: Covered under their respective sector standards (e.g., 29 CFR 1926.417 for construction electrical LOTO, 29 CFR 1926.702 for concrete equipment).
2. Electric Utility Installations: Installations for electric power generation, transmission, and distribution under the exclusive control of electric utilities (governed by 29 CFR 1910.269).
3. Subpart S Electrical Utilization Hazards: Exposure to electrical hazards from work on, near, or with conductors or equipment in electric utilization installations, which are covered by 29 CFR 1910.333 (Electrical Safety-Related Work Practices).
4. Oil and Gas Well Drilling and Servicing: Specialized operations excluded under 1910.147(a)(1)(ii)(C).

Two More Exceptions Live in Paragraph (a)(2)(iii)

A separately numbered pair of exceptions sits in 1910.147(a)(2)(iii) rather than in the (a)(1)(ii) scope list above — a distinction the exam expects you to cite correctly:

• (a)(2)(iii)(A) — Cord and Plug Connected Electrical Equipment: servicing and maintenance of cord-and-plug connected equipment for which exposure to the hazards of unexpected energization or start-up is controlled by unplugging the equipment from the energy source, provided the plug remains under the exclusive control of the employee performing the servicing or maintenance at all times.
• (a)(2)(iii)(B) — Hot Tap Operations: hot tap operations on pressurized transmission and distribution systems for gas, steam, water, or petroleum products, where the employer demonstrates that continuity of service is essential, shutdown of the system is impractical, and documented procedures and special equipment provide proven effective protection.

---

Normal Production Operations vs. The Minor Servicing Exception

Servicing or maintenance performed during normal production operations is generally covered by 29 CFR 1910.147 if an employee is required to:

• Remove or bypass a safety guard or other safety device.
• Place any part of their body into a point of operation or an associated danger zone on a machine or piece of equipment.

The Minor Servicing Exception (1910.147(a)(2)(ii) Note)

OSHA provides a narrow, highly specific exception to mandatory full lockout/tagout during production. Minor tool changes, adjustments, and minor servicing operations taking place during normal production operations are exempt from LOTO only if all three of the following conditions are satisfied:

1. Routine: The activity must be performed as a regular, predictable part of the production process.
2. Repetitive: The activity must occur frequently throughout the shift or production cycle.
3. Integral: The activity must be essential to the continuous production capability of the equipment.

CRITICAL REQUIREMENT: The employer must demonstrate that minor servicing operations are performed using alternative measures that provide effective protection to the employee. Acceptable alternative protection includes engineered interlocked barrier guards, key-interlocking systems, or local control switches that comply with 29 CFR 1910 Subpart O (Machine Guarding).

---

Spectrum of Hazardous Energy Types

Effective energy control requires recognizing that hazardous energy extends far beyond basic electrical current. OSHA regulates seven primary energy forms:

---

The Three Pillars of an Energy Control Program (1910.147(c)(1))

Employers must establish a documented Energy Control Program consisting of three core programmatic elements:

+---------------------------------------------------------------------------------+
|                          ENERGY CONTROL PROGRAM                                 |
+---------------------------------------------------------------------------------+
| 1. Documented Energy    | 2. Employee Training &    | 3. Periodic Annual       |
|    Control Procedures   |    Information            |    Compliance Audits     |
|    (Machine-Specific)   |    (Authorized/Affected)  |    (Certified Annually)  |
+---------------------------------------------------------------------------------+

1. Energy Control Procedures: Written, machine-specific procedures detailing exact steps for isolating, locking, and verifying energy control.
2. Employee Training and Communication: Mandated training programs tailored to employee job duties to ensure understanding of hazardous energy control.
3. Periodic Annual Inspections: Regular evaluations conducted at least annually to verify procedure adequacy and correct deficiencies.

---

Employee Classifications and Role Definitions (1910.147(b))

OSHA categorizes workplace personnel into three distinct regulatory definitions, each carrying specific responsibilities and mandatory training levels:

1. Authorized Employee

An employee who locks out or tags out machines or equipment in order to perform servicing or maintenance on that machine or equipment. An affected employee becomes an authorized employee when that employee's duties include performing servicing or maintenance covered under 1910.147.

2. Affected Employee

An employee whose job requires them to operate or use a machine or equipment on which servicing or maintenance is being performed under lockout or tagout, or whose job requires them to work in an area in which such servicing or maintenance is being performed.

3. Other Employees

All employees whose work operations are or may be in an area where energy control procedures may be utilized. These personnel must understand the general prohibition against attempting to restart or reenergize locked-out machines.

---

Mandatory Employee Training Directives (1910.147(c)(7))

Training depth must correspond strictly to the employee's role tier:

Authorized Employee Training

• Recognition of applicable hazardous energy sources in the facility.
• Type and magnitude of the energy available in the workplace.
• Specific methods and means necessary for energy isolation and control.
• Means of verification of isolation and zero energy state.

Affected Employee Training

• Instruction in the purpose and use of the energy control procedure.
• Absolute prohibition against attempting to restart, reenergize, or tamper with LOTO devices.

Other Employee Training

• General awareness of the energy control program and instruction regarding the prohibition against restarting locked-out equipment.

Mandatory Retraining Triggers (1910.147(c)(7)(iii))

Retraining must be provided for all authorized and affected employees whenever there is:

1. A change in job assignments.
2. A change in machines, equipment, or processes that presents a new hazard.
3. A change in the energy control procedures.
4. Periodic annual inspection findings or employer observations revealing inadequacies or deviations in employee knowledge or utilization of energy control procedures.