Working Cranes Near Overhead Power Lines in Alabama

The five power line sections at a glance

Each section covers a different stage or voltage range.

• 1926.1407: assembly and disassembly near lines up to 350 kV, using the same three options as operations.
• 1926.1408: crane operations near lines up to 350 kV, including the work zone, Table A and encroachment prevention.
• 1926.1409: lines over 350 kV; wherever the rule says 20 feet, use 50 feet for lines up to 1,000 kV, and above 1,000 kV the utility or a qualified registered engineer sets the distance.
• 1926.1410: the strict procedures that apply if work truly must be done closer than Table A allows.
• 1926.1411: traveling under or near power lines with no load, which has its own clearance table (Table T).

Start with the work zone and the 20-foot question

Before any lift, 1926.1408 has the employer identify the work zone. That can be done by marking boundaries with flags or a range limiting or range control warning device and keeping the operator inside them, or by treating the full 360 degrees around the crane out to its maximum working radius as the work zone.

Next comes one question: if the crane were operated up to its maximum working radius in that zone, could any part of it, the load line or the load (including rigging) get closer than 20 feet to a power line? If the answer is no, the power line provisions are satisfied for that setup. If the answer is yes, the employer must pick one of three options:

• Option 1, de-energize and ground: the utility owner or operator confirms the line is de-energized and visibly grounded at the worksite.
• Option 2, keep 20 feet away: use the encroachment prevention measures to keep everything at least 20 feet from the line.
• Option 3, use Table A: get the line's voltage from the utility and keep at least the Table A distance for that voltage, using the same prevention measures.

Table A distances, and what they assume

Table A in 1926.1408 sets minimum approach distances by nominal voltage. Up to 50 kV: 10 feet. Over 50 to 200 kV: 15 feet. Over 200 to 350 kV: 20 feet. Over 350 to 500 kV: 25 feet. Over 500 to 750 kV: 35 feet. Over 750 to 1,000 kV: 45 feet. Above 1,000 kV the utility or a qualified registered professional engineer determines the distance. The upper number in each band includes that voltage.

Two presumptions sit behind those numbers. Every line is treated as energized unless the utility confirms it has been and remains de-energized and visibly grounded at the site, and every line is treated as uninsulated unless the utility or a qualified registered engineer confirms otherwise. A line that looks dead after a storm, or that a homeowner swears is disconnected, is still live for planning purposes. Notice also that the 20-foot option is simply the Table A distance for the highest band it covers, which is why crews that cannot get voltage information default to it.

Encroachment prevention: the measures on the ground

Under Options 2 and 3, 1926.1408 requires a planning meeting with the operator and other workers near the equipment to review where the line is and what will keep everyone clear. Tag lines, if used, must be nonconductive. An elevated warning line, barricade or line of signs with high-visibility markings goes up at the 20-foot or Table A distance, in view of the operator. If the operator cannot see that warning line, a dedicated spotter becomes mandatory.

On top of the warning line, the employer must use at least one additional measure: a proximity alarm set to warn the operator in time; a dedicated spotter in continuous contact with the operator, equipped with a visual aid for judging the distance and positioned to see both the line and the equipment; a device that automatically warns the operator when to stop movement; a range limiting device that stops movement short of the line; or an insulating link installed between the end of the load line and the load. Each has limits. A proximity alarm can be thrown off by multiple lines nearby, a spotter is only as good as the radio and the line of sight, and an insulating link protects workers touching the load but does nothing for a boom that drifts into the line. Many Alabama contractors stack two measures for that reason.

A dedicated spotter must be trained for the role and do nothing else while acting as spotter. That is one reason crews pair the operator card with signal person training.

Calling the utility: Alabama Power, TVA distributors and co-ops

Options 1 and 3 both depend on the utility. In the southern two-thirds of the state that is usually Alabama Power. In much of north Alabama, power comes from TVA through local municipal utilities and cooperatives. Across rural Alabama, distribution cooperatives such as Baldwin EMC, Wiregrass Electric and others serve their own territories. Industrial sites may own their own lines, in which case the facility is the owner or operator for this purpose.

Ask early. When you request voltage information to use Table A, the rule gives the utility two working days to provide it, and OSHA counts working days as calendar days minus weekends and holidays, so a Friday request can run to Tuesday. De-energizing and grounding a line, installing line covers or rerouting service takes longer to schedule, and storm season stretches every utility's crews. Get the confirmation in writing or recorded in the lift plan, including who confirmed it and when.

• The owner and the line's identifying information (pole numbers help).
• Nominal voltage, for Table A planning.
• Whether de-energizing and visible grounding at the site is possible, and for what window.

Alabama's own 10-foot law

Separate from OSHA, Alabama's overhead high-voltage line law prohibits operating, placing or moving tools, machinery, equipment or materials within 10 feet of overhead lines carrying more than 750 volts unless the required precautions are arranged with the utility. Act 2018-402 raised the distance from 6 feet to 10 feet, and equipment that could come within range must carry a warning sticker visible to the operator. A violation is a misdemeanor.

This matters most for work OSHA's crane standard does not reach, such as a boom truck making an excluded delivery. Our boom truck delivery exemption guide explains when that exclusion applies, but the state 10-foot rule and good sense still do.

If the boom contacts a line

1926.1408 requires training for operators and crew on power line hazards, including what to do in a contact. The core instructions: the operator stays on the equipment unless fire or another hazard forces an exit, and if leaving, jumps clear without touching the machine and ground at the same time. Ground workers stay away from the crane, the load and the load line, because the ground around the machine can carry dangerous voltage. The operator tries to move the equipment away from the line only if that can be done safely. Call the utility and emergency services, and keep everyone back until the line is confirmed dead.

A durable electrical hazard warning must be posted in the cab, in view of the operator. Exam prep for the mobile crane operator and articulating crane operator written tests covers these procedures and the clearance tables.

Why digger derricks are treated differently

Line crews use digger derricks within feet of energized conductors every day, which can seem to contradict everything above. The answer is scope. Under 1926.1400(c)(4), digger derricks are excluded from Subpart CC when used to auger holes for electric or telecommunication poles, set and remove those poles, or handle associated materials, and when used for other work covered by Subpart V, the power transmission and distribution standard, provided the work complies with Subpart V (or 1910.268 for telecom). Subpart V has its own approach rules built around qualified electrical workers, insulated equipment and minimum approach distances for trained line personnel.

The exclusion follows the task, not the company. A digger derrick setting precast or lifting materials for a building contractor is back under Subpart CC, with the 20-foot rule and operator certification. Operators who move between pole work and general lifting can prepare with the digger derrick operator course, and the Alabama crane certification requirements page covers who needs certification.