Exterior and Parking Lot Lighting Service
Purpose
Close an exterior lighting complaint in one trip, and hand back a lot that is verified lit after dark rather than verified repaired at noon. Exterior lighting is the only work a service electrician does whose result cannot be seen while it is being performed, which is why it generates more return trips per ticket than almost anything else on the board.
It also guarantees that nobody opens a pole base without knowing what is in it. A lot pole is a grounded metal structure standing in wet soil, fed underground, usually fused inside the hand-hole, and frequently on a circuit no wall switch opens. A tech who assumes the pole is dead because the head is dark has assumed the wrong thing.
Scope
Covers service and repair of pole-mounted and building-mounted exterior luminaires, their branch circuits, and their controls (photocell, lighting contactor, time clock) at 480 V or less on small commercial sites: strip retail, small office, restaurant, multifamily, church lots.
Does not cover pole setting or any excavation, which needs a locate and an excavation-competent crew; roadway lighting on a utility-owned circuit; or converting a whole fixture population, which the Lighting Retrofit Changeout Standard owns. On a conversion, that SOP governs the fixtures and this one governs only the circuit and control work.
Roles and handoffs
| Role | Owns | Hands off |
|---|---|---|
| Dispatch | The after-dark outage map and the site's control type from the last visit | Hands the lead a head-by-head map with the time it was taken, before the truck is scheduled |
| Lead electrician | Isolation, the control-versus-circuit split, in-pole work, night verification | Hands the office any compromised pole base and any circuit that failed an insulation test, same day |
| Office | Pole numbering, the as-found and as-left maps, the re-lamp cycle | Files both maps against the site so the next call starts from a real baseline |
Procedure
Get the outage pattern after dark, and read it as a pattern. Have site staff or an evening tech walk the numbered pole map and mark each head lit, dark, or cycling. Acceptance: every head named by pole number with one of those three states and the clock time observed. Wrong looks like a ticket reading "lot lights out," which sends a truck with no way to choose between a control, a circuit and a fixture. Stop rule: a leaning pole, an open hand-hole, a hanging head or a base in standing water means nobody approaches; cone it off and open the circuit at the panel before the daylight visit. Hazard: a conductor faulted inside a flooded base puts touch potential on the pole, so the walker photographs from distance and does not look inside.
Split the fault at the control before looking at a fixture. Adjacent heads out together is a circuit or a control; a scattered single head is a fixture. At the contactor, confirm the coil is energized and the contacts closed during the dark period, and measure load-side voltage. Acceptance: load-side voltage inside the ANSI C84.1 Range A utilization band, which for a 120 V nominal system runs 110 V to 126 V, measured at the contactor load terminals. Wrong looks like a contactor humming with contacts open, or a photocell reading dark at midday because it faces a wall. Stop rule: a control that will not close is replaced before any pole is opened, because a fixture proved good under a dead control proves nothing. Hazard: this reading is taken on an energized enclosure, so it is qualified-person work under 29 CFR 1910.332 and 1910.399, arc-rated clothing per your employer's program, leads landed one hand at a time.
Isolate at the source, lock it, and prove the pole dead at the hand-hole. Open the breaker feeding the lot, lock and tag under 29 CFR 1910.333(b)(2), then prove dead on a known live source before and after per NFPA 70E-2021, 120.5, with the probe on the pole conductors and on the pole shaft. Acceptance: zero volts conductor to conductor, conductor to pole, and pole to a remote earth reference. Wrong looks like treating the photocell as the isolation, which leaves everything upstream of it live. Stop rule: any voltage pole to earth means a source you have not opened; do not touch the pole, re-lock and trace it. Hazard: the before-and-after check on a known source is what separates a proved-dead pole from a meter with a blown fuse reading a clean, believable zero.
Open the hand-hole and read the in-line fuses before blaming the underground run. Most bases land the branch circuit on fused connectors so one head does not take the row. Pull each fuse and check continuity. Acceptance: continuity through each fuse and no water line, discoloration or corrosion product inside the base. Wrong looks like a tide mark and green corrosion on the connectors, which means the fault recurs whatever you replace. Stop rule: a fuse that opens a second time is not a bad fuse; stop replacing it and go to step 5. Hazard: reaching into a base is a laceration and pinch route, so cover the hand-hole edge and keep hands out until step 3's proof is complete.
Insulation-test the underground run before energizing it again. With the circuit isolated and both ends free, test at 500 V DC conductor to conductor and conductor to ground. Acceptance: our shop gate is 1 megohm minimum on a 600 V class branch circuit, from the one-megohm-per-kilovolt rule of thumb with a one-megohm floor, which on a 600 V class circuit is the floor; it is a shop default, not a code figure, and a wet direct-burial run sitting just above it still gets flagged. Wrong looks like a reading in the tens of kilohms, meaning water in a splice or a nicked conductor. Stop rule: below the gate stops re-energizing entirely; the run is quoted for repair, the affected poles stay dark, and the customer is told in writing that day. Hazard: the tester puts 500 V on the conductors, so confirm both ends are clear of people before pressing test, and discharge the run after.
Set the lift or ladder, then treat the fixture as a fixture. Set an aerial lift on level ground with outriggers deployed, or foot a ladder rated for combined worker, tool and fixture weight with no reach past the rails. Acceptance: head reachable with the worker's belt buckle inside the rails or the basket, wheels chocked, nobody beneath the lift. Wrong looks like a lift set on the lot's drainage slope. Stop rule: wind that moves the boom, or any overhead conductor inside the approach distance for that voltage, stops the work until the utility resolves it. Hazard: booming into the site's own service drop is the electrocution mechanism on this job, and the control is distance established before the boom moves, not attention during.
Replace at the driver or the head, and handle a removed HID lamp as regulated waste from the socket onward. LED heads fail at the driver or the surge device far more often than at the board; HID heads fail at the lamp, capacitor or igniter. Acceptance: the replacement matches existing mounting, voltage range and distribution type, and the removed lamp goes into a closed labelled container with an accumulation start date. Wrong looks like an HID lamp tossed in the truck bed. Stop rule: a lamp broken on site clears people from the area, and cleanup is stiff paper and damp wipe, never a shop vacuum. Hazard: metal halide and high pressure sodium lamps contain mercury, so breaking one is an inhalation route controlled by ventilation and time out of the area, not by gloves; intact lamps are universal waste under 40 CFR 273.
Restore power, then verify the protective functions you disturbed. Remove the lock and close the breaker standing to the hinge side rather than square in front of the door, then confirm the pole's equipment grounding conductor is landed and bonded and that any GFCI device on the circuit still trips and resets on its test button. Acceptance: breaker holds through one full photocell cycle, a measured low-resistance bond from pole to the equipment grounding conductor, GFCI trip and reset confirmed. Wrong looks like a breaker that holds cold and opens twenty minutes later once the drivers are at temperature. Stop rule: a breaker that will not hold is never held in; re-isolate and return to step 5. Hazard: energy going back in is when a fault you did not find announces itself, so approach the door from the side and keep the working space clear.
Verify after dark from the same map. Walk the same numbered map once the photocell has operated. Acceptance: every head dark on the as-found map now lit on the as-left map, at a stated clock time, none cycling. Wrong looks like a daytime bench test, which cannot see a photocell that never closes or a driver that drops out warm. Stop rule: any head still dark reopens the ticket before invoicing. Hazard: none where site staff walk it; where your tech does, high-visibility clothing and a route out of the drive aisles.
The record this produces
Two maps and three values: the as-found map with head states and observation time, the as-left map with the same fields, the step 2 control reading with its measurement point, the step 5 insulation resistance per run in megohms with the test voltage, and the step 8 bonding and GFCI confirmations.
The customer keeps both maps, because that makes the next complaint a two-line comparison instead of a fresh survey. The office keeps the insulation values, which is the file that tells you a lot is on its third splice repair and should be quoted a new run. Whoever numbered the poles owns that numbering permanently; renumbering a site silently destroys every prior record.
Worked pass: nine poles, two heads each, strip retail lot
Step 1 map, 8:40 p.m., walked by property staff: 18 heads, 5 dark. Four of the five are both heads on poles 8 and 9 at the west end; the fifth is the north head on pole 3. That is two faults, not one. An adjacent pair points downstream of pole 7 on the branch circuit; a lone head points at that fixture.
Step 2: coil energized after dark, contacts closed, 121 V line to neutral at the contactor load terminals, inside the 110 V to 126 V band. Control good, so the row outage is downstream.
Step 3: breaker 14 opened, locked, tagged, proved dead at pole 8 on a known live source before and after. Zero volts on all three checks.
Step 4: pole 8's in-line fuse is open, and pole 9 feeds through pole 8, which is how one open fuse takes four heads. A new fuse is installed, the circuit closed, and it opens again within seconds. Step 4's stop rule fires: no second re-fuse.
Step 5 decides the job. Both ends free, 500 V DC: pole 7 to pole 8 reads 340 megohms conductor to ground, clearing the 1 megohm gate. Pole 8 to pole 9 reads 0.04 megohm, a fail by a factor of twenty-five. Step 5's stop rule fires and pole 9 stays dark; the excavation and repair are quoted separately.
What the customer gets tonight comes from pole 8's supply side being intact. The feed-through to pole 9 is landed and capped in pole 8's hand-hole, the fuse replaced, and pole 8's two heads return, so 2 of the 5 dark heads are recovered on the circuit side. Pole 3 is a separate fixture fault, a driver failed open, replaced at step 7 with the old HID lamp boxed as universal waste with its accumulation date.
Step 8: breaker closed from the hinge side, held through a full photocell cycle, poles 8 and 3 bonding confirmed, the GFCI receptacle at pole 1 tripped and reset on its button.
Step 9, 8:15 p.m. the next evening: 16 of 18 lit, only pole 9's two heads dark. That is exactly what step 5 predicted and what the customer was told in writing that afternoon, so the ticket closes at 16 of 18 and closes clean.
References
- 29 CFR 1910.333(b)(2) for isolation and lockout practices on electrical utilization equipment, with 29 CFR 1910.332 and 1910.399 defining the qualified person that step 2's energized readings require
- NFPA 70E-2021, 120.5, in the edition your employer's electrical safety program has adopted, for the live-dead-live sequence at step 3
- ANSI C84.1 for the Range A utilization voltage band in step 2's acceptance
- 40 CFR 273 for universal waste handling of mercury-containing HID lamps removed at step 7
- See related: Lighting Retrofit Changeout Standard SOP, Grounding and Bonding Verification SOP