Plan the Work
Before starting a new task, identify the hazards and agree on controls during this short crew discussion.
What is a pre-task safety briefing or job hazard analysis?
Loose cords cross a walking route. This common hazard must be eliminated.
What is a trip hazard?
This protective fitting prevents a cable from being cut by a sharp sheet-metal entry edge.
What is a suitable bushing, grommet, or listed cable connector?
Four work areas each need three receptacle boxes. This is the total number of boxes.
What is 12 boxes?
A task exceeds your training and authorization. This is the appropriate next step.
What is stop and ask the qualified supervisor for direction?
Before drilling into an existing wall, locate these concealed building systems that the bit could damage.
What are electrical wiring, plumbing, and other concealed utilities?
A worker plans to use the top cap of an ordinary stepladder as a standing platform. This is the correct response.
What is use a suitable ladder/platform and do not stand on the top cap?
A box cover is missing after a rough-in inspection. Before energizing the installation, provide this part.
What is the correct identified cover?
A 96-inch piece of material needs a 28-1/2-inch cut removed. Ignoring saw kerf, this length remains.
What is 67-1/2 inches?
A crew member asks you to repeatedly reset a breaker without finding why it trips. This is the proper response.
What is stop repeated resets and have the fault investigated safely?
Two crews need the same overhead space for ductwork and conduit. This planning activity resolves routes before installation.
What is trade coordination?
Metal jewelry could bridge energized parts while electrical work is performed. This is the appropriate precaution.
What is remove conductive jewelry or render it nonconductive under the applicable safety procedure?
A pulling lubricant is proposed for a cable pull. Verify this material relationship before applying it.
What is compatibility with the conductor insulation and cable jacket?
Five lights are equally spaced in a straight row from the first light at 0 feet to the last at 24 feet. This is the spacing between adjacent lights.
What is 6 feet? (24 feet / 4 spaces.)
The delivered conductor matches the AWG size but has the wrong insulation rating. This is the correct material decision.
What is reject or replace it with conductor meeting the specified ratings?
A planned shutdown will interrupt occupied offices. Before switching, confirm the affected circuits and obtain this operational arrangement.
What is an approved outage plan coordinated with affected users?
A coworker is in contact with an energized conductor. Before touching the person, take this action.
What is safely disconnect the electrical source and summon emergency help? (Do not become a second victim.)
A cable connector grips only the insulated individual wires instead of the outer jacket. This installation detail must be corrected to keep pulling force off the terminations.
What is properly securing the cable jacket with a suitable connector/strain relief?
A support layout has 30 inches of rise and 40 inches of horizontal run. This is the diagonal length.
What is 50 inches? (Square root of (30 squared + 40 squared).)
A carton is marked 10 kA SCCR, but the documented available fault current at its location is 22 kA. This is the installation decision.
What is do not energize/install it in that configuration; obtain a properly rated or verified current-limited arrangement?
A machine has normal power, a separate control supply, and a UPS connection. The isolation plan must address this number of identified electrical sources.
What is all three sources? (Also verify whether any other stored or alternate energy sources exist.)
A variable-frequency drive is disconnected, but its DC-bus capacitors can retain hazardous voltage. Before work, follow this manufacturer requirement and verify the resulting condition.
What is wait the specified discharge time and verify absence of hazardous voltage?
A penetration passes through a fire-resistance-rated wall. Finish it using this tested arrangement matched to the wall, penetrants, and opening.
What is an approved listed firestop system?
A layout needs twelve 7-foot pieces. Each 10-foot stick yields only one full piece. This is the minimum number of sticks and total leftover length, ignoring kerf.
What are 12 sticks and 36 feet of leftover material?
A crew member suggests bypassing a machine guard interlock to finish production. This is the correct response and reason.
What is refuse the bypass, stop the unsafe task, and involve the supervisor because it defeats a safety function?