Page 273 - Safety Memo

a. Machinery or equipment capable of movement shall the machine or equipment, or the release of stored energy.
be stopped, and the power source shall be de- 3314(i)
energized or disengaged.
7. The employer is required to conduct a periodic inspection
b. Moveable parts shall be mechanically blocked or of the energy control procedures(s) at least annually to
locked out. evaluate their continued effectiveness and determine
necessity for updating written procedures. 3314(j)
c. If the equipment must move during cleaning, servicing
or adjusting operations, the employer shall provide and 8. Energy control procedures for controlling energy sources
require the use of extension tools or other means to in electrical power generation installations and related
protect employees from injury due to the movement. equipment for communication or metering shall be in
Employees shall be trained on the safe use and accordance with 2940.13
maintenance of such tools or means. 3314(c)(1)
9. De-energizing procedures of transmission/distribution
2. Repair work or setup operations. 3314(d) lines and equipment for the purpose of protecting
employees shall be in accordance with section 2940.14
a. Equipment that has lockable controls or that is readily
adaptable to lockable controls shall be locked out or B. For heavy construction equipment repair, 1595(a) requires that
positively sealed in the off position. repairs must not be made until workers are protected from
movement of the equipment or its parts.
b. For equipment not equipped with lockable controls or
readily adaptable to lockable controls, positive means C. An authorized person shall be responsible for the following
must be taken, such as de-energizing or disconnecting before working on de-energized electrical equipment or
the equipment from its source of power, or other action systems unless the equipment is physically removed from the
which will effectively prevent the equipment from wiring system: 2320.4
inadvertent movement or release of stored energy.
1. Notifying all involved personnel. 2320.4(a)(1)
3. Accident prevention signs or tags shall be placed on the
controls of equipment, machines, and prime movers. 2. Locking the disconnecting means in the “open” position
3314(c), (d) with the use of lockable devices, such as padlocks or
combination locks, or disconnecting the conductor(s) or
4. A written hazardous energy control procedure shall be other positive methods or procedures that will effectively
developed and used by the employer. 3314(g) prevent unexpected or inadvertent energizing of a
a. Energy control procedure must include separate designated circuit, equipment, or appliance. 2320.4(a)(2)
procedural steps for the safe lockout/tagout of each Exception: Locking is not required under the following
machine. conditions:
5. When servicing and/or maintenance is performed by a a. Where tagging procedures are used as specified in
crew, craft, department, or other group, they shall utilize a 2320.4(a)(3), and
procedure which affords the employees a level of
protection equivalent to that provided by the utilization of b. Where the disconnecting means is accessible only to
a personal lockout or tagout device. 3314(h) personnel instructed in these tagging procedures.
6. Specific hazardous energy control procedures must be 3. Tagging the disconnecting means with suitable accident
utilized during shift or personnel changes to ensure the prevention tags conforming to the provisions of 2320.6,
continuity of lockout or tagout protection, including, but not 3314(e), and 2320.4(a)(3).
necessarily limited to, provision for the orderly transfer of 4. Effectively blocking the operation or dissipating the energy
lockout or tagout device protection between off-going and of all stored energy devices that present a hazard,
oncoming employees, in order to minimize exposure to such as capacitors or pneumatic, spring-loaded, and like
hazards from the unexpected energization or start-up of mechanisms. 2320.4(a)(4)
D. For more helpful information see:
1. The Lock-out/Block-out Methods and Sample Procedures

104 Cal/OSHA Pocket Guide for the Construction Industry | June 2019 Cal/OSHA Pocket Guide for the Construction Industry | June 2019 105