Cord and plug lockout decisions depend on what happens after equipment is unplugged. Under the cord-and-plug exclusion in OSHA 1910.147, unplugging must control the relevant unexpected energization or start-up hazard, and the plug must remain under the exclusive control of the employee performing the work. Being nearby, in the same room or able to see the outlet does not automatically establish that control. Review the complete task, possible reconnection and any remaining hazards before deciding which procedure and hardware are appropriate.
This guide focuses on maintaining control during servicing, rather than repeating enclosure dimensions. For physical product selection, read what a plug lock is and how its fit is checked. QVAND’s electrical lockout range includes accessories to evaluate against the approved procedure.
Apply the cord-and-plug exclusion to the actual task
Start by identifying the equipment and the work to be performed. Determine whether the equipment is genuinely disconnected through its cord-and-plug connection, whether that action controls the relevant hazard, and whether the worker can maintain the necessary control for the full servicing period.
The controlling text is 29 CFR 1910.147(a)(2)(iii)(A). The exclusion has conditions; it is not a blanket permission to treat every unplugged machine as safe. A cord does not remove batteries, stored mechanical energy, compressed air or a second supply from consideration.
For example, unplugging the charger of a battery-powered machine does not necessarily disconnect the battery that can operate it. Likewise, a machine with electrical power and a compressed-air connection needs an assessment of both hazards. These are planning examples, not procedures for a particular equipment design.
Exclusive control means being able to prevent reconnection
Ask whether the servicing employee has both the authority and the continuing practical ability to prevent someone else from re-energizing the equipment. The work position, access routes and task sequence matter. Control that exists while preparing the job may disappear when the employee reaches into a machine, moves behind it or leaves to collect a tool.
OSHA’s November 30, 2010 interpretation explains why a plug within five feet is not automatically under exclusive control. It also distinguishes the cord-and-plug exclusion from other isolation devices. Use the actual ability to prevent reconnection as the decision point, rather than adopting a universal distance rule.
A verbal instruction to nearby colleagues does not physically prevent another person from reconnecting a plug. A warning label may communicate the situation, but communication alone does not establish the required control. Review arrangements for cleaners, contractors and other users who may not have been present at the initial discussion.
Review common changes in the work situation
The following table is an assessment aid. It does not declare that an exclusion applies to a whole category of equipment. The employer must determine the appropriate method from the task and all relevant hazards.
| Situation | Question to resolve | Planning response |
|---|---|---|
| One employee, one plug | Does unplugging control the hazard, and can that employee continuously prevent reconnection? | Document the basis for the applicable method and its limits |
| Worker moves away from the plug | Can someone reconnect it while the worker is elsewhere? | Reassess control before exposure; select an approved protection method |
| Several plugs or energy connections | Which connection can energize the serviced parts or create motion? | Identify every relevant source and its required control |
| Multiple workers | How does each exposed person retain protection? | Use a suitable documented group arrangement rather than a one-person assumption |
| Fixed wiring or exposed electrical parts | Which electrical work-practice requirements apply? | Have qualified personnel establish the necessary disconnection and verification procedure |
| Task or shift changes | Does the original worker still control the situation? | Provide an explicit transfer or re-establishment of protection |
Decide what a plug enclosure contributes
A suitable locked enclosure can prevent an enclosed plug from being reinserted while the device remains properly secured. It provides a physical control to evaluate when unrestricted access would otherwise allow reconnection. Its usefulness depends on containment, retention, personal-lock control and compatibility with the actual plug.
Do not describe buying an enclosure as proof that the task now qualifies for an exclusion. The broader assessment must still establish which hazards exist and how they are controlled. A plug box does not discharge a capacitor, restrain a raised component or isolate a pneumatic supply.
Use the enclosure in the manner specified by its manufacturer and approved by the site. Some work situations require the complete energy-control procedure even though an electrical plug is one of the isolation points. A product is one element of that arrangement, not an independent determination of which rules apply.
Check containment without creating a new cord hazard
For the selected enclosure, confirm that the plug is fully contained and cannot be accessed for reconnection with the locking arrangement in place. Check the cable exit, molded strain relief, closure and actual padlock. A plug that fits inside an open box can still interfere with closing or retention.
Use a representative disconnected sample in safe conditions. Follow the instructions for retention checks; do not crush the cord, force a closure over an oversized connector or improvise a larger opening. If the device cannot close and remain secured as intended, select a suitable model rather than modifying it.
The QVAND electrical plug enclosure is the reference product in this article’s illustrations. The generated scenes retain its photographed shell, hinges, seam and locking tabs. They do not establish a water-ingress rating, universal plug compatibility or an approved multi-worker installation. Obtain model-specific documentation for those questions.
Trace multiple cords back to the equipment
Portable and laboratory equipment can have more than one power connection. A main drive, heater, controller or external accessory may have a separate supply. Labels and cable tracing should establish which connection serves the work area; a familiar plug color is not enough.
Also consider detachable cords. The assessment should determine whether a different cord or connection could re-energize the equipment even though the removed plug is secured. Resolve that possibility through the approved isolation method rather than assuming custody of one loose cable controls every energization path.
Record each relevant connection against the equipment identifier. For a wider method of separating sources, physical isolation points and people, use the article on planning multiple energy-isolation points. It complements this plug-control discussion without substituting for the machine-specific survey.
Do not extend the exclusion to a nearby disconnect switch
The cord-and-plug provision should not be transferred to a disconnect, breaker or wall switch merely because an employee can see it. These devices have different functions and are subject to the applicable isolation and electrical work requirements.
Where the task exposes employees to electrical parts, OSHA 1910.333 addresses electrical safe-work practices, including disconnection and verification by qualified personnel. Do not interpret a successful start-button check as a test that exposed parts are electrically de-energized.
The existing push-button cover and energy-isolation guide explains why restricting an operating control does not itself isolate energy. That distinction remains important when a machine has both a removable plug and a local control panel.
Plan interruptions, shared tasks and handover
Consider how the employee will maintain protection while collecting parts, responding to another task or changing work position. If the original arrangement depends on the person’s continuous presence, an interruption can change the basis on which it was accepted. Establish the response before servicing starts.
When another worker joins, reassess the method instead of treating the original worker’s control as automatic protection for everyone. Each exposed participant needs the protection required by the applicable group procedure. Extra holes on a plug enclosure do not, by themselves, define that procedure.
For handover, identify the equipment, work status, remaining hazards, devices and responsibility. Never assume that the next shift knows why a plug is disconnected. Restoration also needs an explicit decision after tools, personnel and equipment condition have been checked under the site’s process.
Keep a short control record with clear boundaries
A useful task record identifies the equipment and plug, servicing scope, relevant energy sources, responsible employee and basis for the chosen method. Add the conditions that would require reassessment, such as another worker joining, a second connection being found or the employee leaving the area.
For an enclosure purchase, retain the accepted plug family, model, padlock arrangement and sample photographs. This prevents the purchasing record from drifting into an unsupported statement that all cord-connected equipment is covered. Recheck when plugs, detachable cords, accessories or servicing tasks change.
Request exact dimensions and instructions from QVAND, and explain the actual control problem in the inquiry. An order description such as “a box for a nearby plug during one-person servicing” is less useful than identifying the connector, reconnection access, planned worker movements and required personal protection.
Watch: keep plug control within the hazardous-energy review
Workplace Safety & Prevention Services introduces hazardous energy and the overall lockout sequence in this educational video. Use it as background for a site discussion, not as an explanation of the US cord-and-plug exclusion or an installation tutorial for a particular box.
Watch the WSPS lockout education video on YouTube.
Frequently asked questions
Does unplugging always remove the need for lockout?
No. The relevant hazard must be controlled by unplugging, the plug must remain under the servicing employee’s exclusive control for the exclusion to apply, and other applicable hazards and requirements still need assessment.
Is a plug within five feet automatically under exclusive control?
No. OSHA’s interpretation focuses on the employee’s authority and continuing ability to prevent reconnection, not a fixed distance alone.
Does a locked plug box remove stored energy?
No. An enclosure can restrict reconnection of the contained plug. Stored electrical, mechanical, pressure or other energy requires its own appropriate controls.
Can the same exclusive-control reasoning be used for a disconnect switch?
Do not extend the cord-and-plug exclusion to other isolation devices. Apply the relevant energy-control and electrical work-practice requirements to the actual equipment and task.
Review the referenced QVAND product and send your application details for a model-specific sample discussion.