Lockout/Tagout, First Aid, and Emergency Response

Objective. Learners will demonstrate a complete six-step OSHA-compliant lockout/tagout procedure on a training panel and perform hands-only CPR and AED use to the standard required for a nationally recognized CPR/AED/First Aid certification.

Why Lockout/Tagout and Emergency Response Matter

Electricity kills silently and instantly. A worker who contacts an energized conductor at 120 V can suffer cardiac arrest in under a second. OSHA's Lockout/Tagout (LOTO) standard — 29 CFR 1910.147 — exists for exactly this reason: it requires a written, step-by-step procedure that removes hazardous energy from equipment before anyone works on it. Knowing LOTO is not optional for an electrician; it is a legal requirement on every job site.

OSHA 10 training and NCCER curricula both treat LOTO and emergency response as foundational skills. Employers screen for them before a worker ever touches a panel.

The Six-Step OSHA-Compliant LOTO Procedure

Memorize these steps in order. Skipping any single step can result in a fatal exposure.

Step 1 — Notify affected employees.

Tell everyone who operates or works near the equipment that it will be shut down and locked out. This prevents a co-worker from accidentally re-energizing the circuit while you work.

Step 2 — Shut down the equipment.

Use the normal stopping procedure for the machine or circuit. Press the stop button, flip the switch, or use whatever control the manufacturer specifies. The equipment must reach a complete stop before you proceed.

Step 3 — Isolate the energy source.

Operate the energy-isolating device — typically a disconnect switch or breaker — to physically separate the equipment from its energy source. Do not rely on a control switch alone; it is not an energy-isolating device.

Step 4 — Apply a lockout device and tag.

Place your personal lock on the hasp of the energy-isolating device so that it cannot be re-energized without your key. Attach a tag that identifies you, the date, and the reason for the lockout. Each authorized worker applies their own lock — never share a lock.

Step 5 — Release or restrain stored energy.

Capacitors hold charge. Springs hold tension. Gravity can drop a raised load. Bleed, block, drain, or restrain all stored energy before proceeding. In electrical work this commonly means discharging capacitors and verifying that gravity-operated equipment is blocked.

Step 6 — Verify zero energy state.

Attempt to start the equipment using its normal controls — it should not respond. Then use a properly rated and tested non-contact voltage tester or multi-meter to confirm that all conductors you will touch are at zero volts. Test the tester on a known live source before and after to confirm the tester itself is working. Only after this verification is it safe to begin work.

When work is complete, remove all tools and materials, restore guards, notify affected employees, remove your lock and tag, and return energy to the equipment in the reverse order.

Personal Protective Equipment During LOTO

Even during a lockout procedure, wear appropriate PPE: safety glasses, voltage-rated gloves when testing for zero energy, and arc-rated clothing if the task requires exposure to potential arc flash. The LOTO procedure reduces — but does not eliminate — all hazard during verification.

Recognizing an Electrical Emergency

If a co-worker is in contact with an energized source, do not touch them. Your first action is to de-energize and lock out the circuit. Only after the power is confirmed off is it safe to approach the victim. Rushing in to pull someone free from a live conductor turns you into a second victim.

Call 9-1-1 immediately. Give dispatchers: your exact location (address, floor, room), the nature of the emergency (electrical shock), the number of victims, and whether the scene is safe.

Hands-Only CPR

After the circuit is de-energized and the scene is safe, begin assessment. If the victim is unresponsive and not breathing normally:

1. Call 9-1-1 or direct someone specific to call.

2. Begin chest compressions: place the heel of one hand on the center of the chest, place the other hand on top, press down at least 2 inches at a rate of 100–120 compressions per minute. Push hard and fast.

3. Continue until an AED arrives, a trained rescuer takes over, or EMS assumes care.

Hands-only CPR is appropriate for adult victims of sudden cardiac arrest. If you are trained in rescue breaths, use them; if not, compressions alone are far better than nothing.

Using an AED

Automatic External Defibrillators (AEDs) analyze heart rhythm and deliver a shock if one is needed. When the AED arrives:

1. Power it on.

2. Attach pads as shown in the diagram on the pads — one below the right collarbone, one on the left side below the armpit.

3. Ensure no one is touching the victim while the AED analyzes.

4. Follow the voice prompts: if a shock is advised, clear everyone, then press the shock button.

5. Immediately resume compressions after the shock.

First Aid for Electrical Burns and Lacerations

Electrical burns often appear minor on the skin but damage tissue along the entire current path. Do not remove clothing stuck to a burn. Cover lightly with a clean, dry dressing and keep the victim warm until EMS arrives. For lacerations, wear nitrile gloves, apply firm direct pressure with a clean bandage, and maintain pressure until bleeding stops or EMS arrives. Do not remove a bandage that is soaked — add more material on top.

Summary

LOTO, CPR, AED use, and basic first aid are the emergency response triangle for electricians. LOTO prevents the emergency. CPR and AED use save a life when prevention has failed. Knowing both — and keeping your skills current with certified training — is a professional and legal obligation in this trade.

Key terms9

Lockout/Tagout (LOTO)An OSHA-required procedure (29 CFR 1910.147) that uses a physical lock and an informational tag to prevent hazardous energy from being released while workers service equipment.

Energy-isolating deviceA mechanical device — such as a disconnect switch or circuit breaker — that physically prevents the transmission or release of energy; it is the device to which a lock is applied during LOTO.

Zero energy stateThe condition in which all forms of hazardous energy (electrical, mechanical, pneumatic, hydraulic, thermal, gravitational) have been isolated, released, or restrained and verified to be absent before work begins.

HaspA multi-hole lockout device that allows more than one worker to apply their individual padlock to a single energy-isolating device, ensuring no single person can restore energy before all workers are clear.

Stored energyResidual energy remaining in a system after the power source is isolated, including charge in capacitors, tension in springs, pressure in pneumatic or hydraulic lines, or a suspended load held by gravity.

Hands-only CPRCardiopulmonary resuscitation performed with chest compressions alone — at a rate of 100–120 per minute and a depth of at least 2 inches — without rescue breaths; recommended for adult bystander response to sudden cardiac arrest.

AED (Automated External Defibrillator)A portable device that analyzes a victim's heart rhythm and, if appropriate, delivers an electrical shock to restore a normal rhythm; designed for use by bystanders with minimal training.

Authorized employeeUnder OSHA 29 CFR 1910.147, the worker who applies the lockout or tagout device and performs the servicing; distinct from 'affected employees,' who operate the equipment under normal conditions.

Arc flashA sudden release of energy caused by an electrical fault, producing intense heat, pressure, and light that can cause severe burns; mitigated by arc-rated PPE and LOTO before work begins.

In class: Instructor demonstrates LOTO on a dedicated training disconnect panel; learners then perform the full sequence—notify, shut down, isolate, apply lock and tag, release stored energy, verify zero energy—on the same panel while a peer evaluates each step against a printed checklist. · Learners rotate through a CPR/AED/First Aid station: perform 2-minute cycles of hands-only CPR on a manikin, use an AED trainer on a second manikin, and bandage a simulated laceration; a certified instructor scores each learner using the certification provider's skills sheet. · Role-play an electrical emergency: one learner acts as a victim of shock, another calls 9-1-1 using a script (location, nature of injury, number of victims), a third initiates LOTO before any contact, and a fourth begins CPR — then the group debriefs what went right and what would have endangered the rescuer.
Materials: LOTO training panel with hasp, locks, and tags (non-energized training unit), OSHA 29 CFR 1910.147 reference card, CPR manikins (at least one per four learners), AED trainer unit, first aid kit (bandages, gloves, face shields), CPR/First Aid certification provider student workbook
Check: Learners must complete every step of the LOTO skills checklist without prompting and without skipping any step (100% completion required, as any missed step is a life-safety failure); CPR/First Aid certification skills test must be passed at the certifying organization's published standard.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.