Working Near Overhead Power Lines Standard

Purpose

This standard keeps a tech's ladder, wand, and the stream of water itself out of contact range with an energized overhead line. Most trades that work near lines only have to keep a tool and a body clear; a pressure-washing crew also has to keep a jet of water clear, and that jet is a far better conductor once it is carrying a chemical mix than a general contractor's intuition about "it's just water" accounts for. Skip the site-specific steps here and the failure is not the tech touching a wire, it is the stream bridging a gap the tech never got physically close to.

Scope

Covers any wash task where the highest reachable point, a ladder top, an extension wand's tip, or the stream's own reach, comes near an overhead service drop, triplex line, or distribution conductor: houses with a mast-head service entrance, detached structures fed by an overhead drop, and commercial sites with pole-mounted equipment. It does not cover ladder setup mechanics, owned by the Ladder Work and Roof Access Safety Standard, or fall-arrest and restraint rigging, owned by the Fall Protection for Second-Story and Roof Work SOP.

Roles and the handoff between them

Minimum approach distance, and why the stream counts

OSHA's general industry standard for unqualified persons working near exposed energized parts, 29 CFR 1910.333(c)(3), sets a minimum approach distance that commonly works out to about 10 feet for lines under roughly 50 kV nominal, the class a typical residential service drop or triplex line falls into. That figure is not automatic: a line still running pole to pole, feeding a transformer rather than dropping into a meter, is a primary distribution circuit and looks identical from the ground to a low-voltage drop. Where the voltage class cannot be confirmed by sight, treat it as unknown-high and get the utility to classify it rather than assuming the 10-foot figure applies.

The second hazard is specific to this trade and is easy to miss: the water stream itself is part of the approach distance, not just the ladder or the wand. Plain rinse water is a modest conductor; a softwash mix carrying dissolved sodium hypochlorite and surfactant carries far more dissolved ionic content and conducts meaningfully better. A fiberglass wand held at a safe distance does not protect against the stream leaving that wand and crossing into the clearance zone on its own.

A rough field distinction between the two line types: a service drop or triplex is usually a single bundled cable running from the pole down to one meter, often with a visible weatherhead or mast at the house end. A primary distribution conductor runs pole to pole along the street or property line, feeds a transformer rather than a single meter, and is frequently uninsulated bare wire rather than a jacketed bundle. Neither observation is a substitute for the utility's own classification when a line's path or endpoint is unclear, but it is enough to catch the common miss: assuming every wire crossing a yard is a low-voltage drop just because a low-voltage drop is what feeds the house being washed.

The procedure

1. Survey and identify every overhead line on the property before equipment comes off the truck, including ones the customer does not mention. Walk the perimeter, note the service drop or mast location, any secondary lines crossing the yard, and any drop passing directly beside a wall or gable that is in scope. Acceptance: every visible line noted with the closest planned wash point to it estimated in feet. Wrong looks like noticing the obvious mast head and missing a triplex line crossing behind a detached garage. Stop rule: any line whose voltage class cannot be identified by sight is treated as unknown-high until the utility confirms otherwise. Hazard: keep this survey at ground level, well back from any wall the ladder will eventually touch.

2. Classify each line's likely voltage and set its minimum approach distance before setup. A drop or triplex running into a single meter is treated as under 50 kV, a 10-foot minimum approach for the ladder, the tool, and the stream alike. A line still on the pole side, feeding a transformer or running pole to pole, is a primary circuit and gets a larger clearance confirmed by the utility rather than assumed. Acceptance: a clearance distance in feet recorded for each line identified in step 1. Wrong looks like applying the residential-drop figure to a line that is clearly still running pole to pole rather than down to a meter. Stop rule: any line that cannot be confidently classified gets the utility call before any ladder goes up near it. Hazard: none yet, still ground-level classification.

3. Choose fiberglass only for anything working inside a working margin twice the clearance distance set in step 2. For a line classed under the 10-foot rule that margin is about 20 feet; for a primary line held to a larger utility-confirmed clearance, the fiberglass-only margin scales the same way, twice whatever distance the utility confirmed, not the fixed 20-foot figure. Any ladder, extension wand, or gutter tool used within that margin is fiberglass, never aluminum and never a wand with a metal core, even if the shaft's handle is coated. Acceptance: equipment for that section confirmed fiberglass out loud before setup, with the margin distance actually used named against the line's classification. Wrong looks like grabbing the aluminum extension pole because it is already assembled from the last job, on the theory that distance alone will be kept, or applying the 20-foot residential figure to a primary line without doubling its larger confirmed clearance. Stop rule: no fiberglass equipment on the truck for that reach means the section is skipped this visit, not attempted with aluminum at extra caution. Hazard: none if followed; the hazard sits entirely in skipping the swap.

4. Check wind before aiming, then keep the stream's own reach, not just the tool, outside the clearance zone. Read wind off a flag, tree movement, or a handheld gauge before the first pass near any classified line. Any wind strong enough to visibly move small branches or break up a spray pattern before it lands widens that section's clearance distance from step 2 by half again its stated figure, because drift and bounce are exactly what a visual-only aim cannot catch in that condition. In calm conditions, angle position and distance so the water path, including drift and bounce, cannot cross into the zone around the line, remembering that a chemical-loaded stream conducts better than plain rinse water. Acceptance: a stated wind observation logged immediately before the pass, and the stream's path kept clear of the line at the wind-adjusted clearance distance, application angled away from the conductor rather than toward it. Wrong looks like wanding straight up at a fascia board with a service drop passing a few feet above it on the theory that it is just water, or judging clearance by eye alone in a wind that is already moving foliage. Stop rule: if the wash point's geometry cannot keep the stream clear of the zone at the wind-adjusted distance, or wind is gusting hard enough that a steady clearance cannot be judged at all, that section is excluded from today's scope and rescheduled for calmer conditions rather than attempted on closer visual judgment. Hazard: this is the trade-specific miss this SOP exists to catch; a fiberglass wand and a careful stance do not protect against the stream itself closing the gap, and if that does not hold, meaning the stream contacts a line or a near-miss occurs, drop the wand, do not touch the technician or any wet equipment, back everyone away from the stream's former path, and call the utility for emergency de-energization before anyone approaches again.

5. Call the utility when a line genuinely blocks required scope, rather than working around it. Where a mast or drop sits close enough that no fiberglass setup or stream angle keeps clearance, request a temporary de-energize or a protective cover ahead of the visit. Acceptance: a documented utility contact or a documented decision to exclude that section instead. Wrong looks like deciding to be quick about it on the theory that brief proximity is low risk. Stop rule: without a utility accommodation, that section stays excluded and the customer is told why in plain terms. Hazard: none if followed.

6. Document the clearances actually achieved, not just the plan. Confirm on the ticket what clearance was maintained for each identified line and note any excluded sections. Acceptance: written clearance figures per line, exclusions noted with reason. Wrong looks like a ticket that says "careful around the power line" with nothing measurable. Stop rule: none, this is a closing record step. Hazard: none.

The record this produces

The ticket carries every line identified in step 1, its voltage classification and clearance distance from step 2, the equipment used for each near-line section, any exclusion and its reason, and any utility contact made. A lead reviewing a repeat property can see, without re-surveying, exactly what clearance was maintained the last time and whether a utility accommodation is already scheduled.

Worked pass: a mast-head drop and a triplex crossing a side yard

A two-story house has a mast-head service entrance landing on the gable that needs washing, and a detached garage behind it fed by a triplex crossing about 12 feet above the side yard.

Step 1 finds both lines and estimates the mast drop's distance from the gable's fascia at roughly 6 feet, the triplex's height above the side yard at about 12 feet.

Step 2 classifies both as standard low-voltage lines feeding single meters, both getting the 10-foot minimum approach.

Step 3 pulls fiberglass equipment for the whole visit given both lines are in play, confirmed out loud.

Step 4 opens with a wind check: calm, no branch movement, no widened clearance needed. Even so, it fails at the gable: the mast drop attaches only about 6 feet to the side of the exact fascia run needing washing, well inside the 20-foot working-margin from step 3, and the stream angle needed to reach that run would send drift across the drop's path regardless of wind. The stop rule applies: that specific fascia run is excluded from the pass.

Step 5: the utility is called ahead of a rescheduled date and agrees to a temporary protective cover for the mast that week; the rest of the visit proceeds as planned.

Step 6: the ticket documents the triplex clearance maintained, roughly 15 feet kept from any ladder or stream reach, well clear of the 10-foot minimum, the gable exclusion and its reason, and the follow-up date once the utility's cover is in place.

References

• See related: Ladder Work and Roof Access Safety Standard
• See related: Fall Protection for Second-Story and Roof Work
• OSHA 29 CFR 1910.333(c)(3), minimum approach distance for unqualified persons near exposed energized parts, general industry
• Local utility company procedure for requesting a temporary line cover or de-energize, timing confirmed with the utility directly