The Service Upgrade Coordination SOP

Purpose

A service upgrade involves three parties who do not talk to each other unless the shop makes them: the utility, which owns the drop or lateral and the meter; the building department, which must release the work before the utility will reconnect; and the household, which loses power for most of a day. This SOP guarantees that every upgrade reaches outage day with a utility work order, a permit, a scheduled inspection, a household that has said in writing what cannot lose power, and a restore check that proves the new service is safe before the loads come back. Without it, the usual failure is not a wiring defect. It is a crew standing at a dead house at 3 pm with no inspector, no reconnect and an oxygen concentrator nobody asked about.

Scope

Covers: replacing or upsizing a residential service (meter base, service conductors, main panel) where the utility must disconnect and reconnect, from the decision to upgrade through the final inspection.

Does not cover: deciding whether an upgrade is needed at all (See related: Measuring Existing Load Before You Sell a Service Upgrade, and Alternatives to a Service Upgrade), the utility's internal timeline and why it runs long (The Utility Service Upgrade and Its Timeline), or the order of the rest of the conversion (How to Coordinate the Trades on a Conversion). Panel-only replacements that the utility does not touch skip steps 2 and 6 but keep steps 5, 7 and 8.

Roles and responsibilities

The handoff that breaks is the inspector's release reaching the utility. Many utilities will not reconnect until the authority having jurisdiction (AHJ) notifies them, so the coordinator confirms how that notice travels in your area before outage day, not on it.

Procedure

1. Open the upgrade file with the decision and its basis. Record the existing and new service rating, the load calculation method and result, and the reason for the upgrade. Acceptance: a calculation attached that shows the new rating, with the method named (standard, optional or measured). Wrong looks like an upgrade sold on "the panel is full" with no calculation, which is a space question, not a capacity one. Stop rule: no calculation, no utility application; the file goes back to the electrician. Hazard: none, a desk step.

2. Submit the utility service application and get a work order. File through the utility's builder or contractor portal with the load letter, panel location, meter location, and overhead or underground. Acceptance: a work order number, a named utility planner or design contact, and a stated date for their field visit. Wrong looks like a request for a transformer upgrade, a meter relocation, or a note that the lateral or drop must be replaced, each of which adds weeks. Stop rule: any of those, re-plan the conversion schedule and tell the customer in writing the same week; do not book other trades against the original date. Hazard: none at the desk; at the utility's field visit, the service drop stays energized and nobody sets a ladder within reach of it.

3. Pull the permit. The electrician of record applies with whatever the AHJ requires (often the load calculation, a one-line sketch and the grounding electrode plan). Acceptance: permit number on the file and the AHJ's inspection request method noted. Wrong looks like a plan review hold or a requirement you did not plan for, such as a new grounding electrode or an exterior disconnect. Stop rule: a hold moves the outage date; nothing is scheduled with the utility until the permit is issued. Hazard: none, a desk step.

4. Prepare the site before outage day. Set the new meter base or confirm its location, run the new service raceway, stage the panel, and confirm working clearances at the new equipment (NEC 110.26, as adopted by your jurisdiction). Acceptance: everything that can be done with the old service live is done, and the electrician can name the outage-day sequence and its duration. Wrong looks like a sequence that needs more hours than the utility's window allows. Stop rule: if the work cannot fit the window, split it or ask for a longer one before scheduling. Hazard: the existing service is energized throughout this step, with no disconnect above the old main except the utility's; nothing on the line side of the old main is touched, and ladder work at the mast keeps clear of the drop.

5. Ask the household, in writing, what cannot lose power. Send the questions and get answers back: any oxygen concentrator, CPAP, home dialysis, powered mobility, refrigerated medication, or medical alarm; a sump pump in a wet season; heat for a house in freezing weather; anyone working from home; freezers; aquariums; a security or fire alarm that will report a trouble signal. Acceptance: written answers, and for every yes, a plan named on the file (a stay elsewhere, a charged battery backup sized for the hours, or a later date). Wrong looks like no reply, or a life-sustaining device with no plan. Stop rule: no reply means no outage date; a life-sustaining device without a plan means the outage is not scheduled, and the coordinator points the household to the utility's medical certification program where the state has one. Hazard: a household planning its own backup may connect a portable generator; tell them in writing never to plug one into house wiring without a transfer switch, because it backfeeds the line the crew is working on, and that CDC guidance puts a running generator outdoors, at least 20 feet from doors and windows.

6. Schedule the outage with the utility and tell the household. Book disconnect, inspection and reconnect in one window, ideally early in the day so a delay does not run past dark. Send the household the date, the expected window in hours, what will be off, and food guidance: a closed refrigerator keeps food cold for about 4 hours, a full freezer about 48, per USDA. Acceptance: a confirmed utility date, an inspection booked for that day, and a notice sent at least 72 hours ahead, a shop default. Wrong looks like an inspection that cannot be booked for the same day. Stop rule: if the inspection cannot be same-day, ask the AHJ whether it will release before inspection; if not, move the date. Hazard: in freezing weather, a house without heat for a full day can freeze plumbing; the plan from step 5 covers it.

7. Outage day: prove the old service dead before work starts. After the utility disconnects, the electrician tests for absence of voltage at the old meter base and the old main, proved on a known live source before and after per NFPA 70E Article 120 (120.5 in the 2021 edition, renumbered in 2024), with work practices under 29 CFR 1910.333(b)(2) or the construction rules in 29 CFR 1926 Subpart K, whichever applies to the work. Acceptance: zero on every phase-to-phase and phase-to-ground pair with the meter proved before and after. Wrong looks like any voltage, which can come from a generator, a solar inverter, or a battery system. Stop rule: any reading stops the work until the source is found and isolated. Hazard: on a house with solar or storage, the electrician confirms both are shut down and isolated per their labels before the test, because either can energize the panel with the utility gone.

8. Restore check before any load comes back. After the inspector releases and the utility reconnects, with the new main open, read voltage at the main's line terminals. Acceptance: each leg to neutral within about 114 to 126 volts and leg to leg about 228 to 252 volts, the normal range ANSI C84.1 describes for a 120/240-volt service, and the two leg-to-neutral readings within a few volts of each other. Wrong looks like one leg high and the other low by the same amount, which is the signature of an open or loose neutral. Stop rule: on that signature, the main stays open, the utility is called back, and nothing is energized. On a pass, close the main, then branch breakers one at a time with heavy loads last, and leave any heat pump off for the crankcase warm-up time its manufacturer states before it runs. Hazard: this is the step that puts energy back; stand to the side of the panel when closing the main, wear the arc-rated PPE your risk assessment names, and keep the household away from the panel and any appliance until every breaker is closed.

9. Close the file. Record final inspection, meter set, and the restore readings; tell the household what was found and what was not changed. Acceptance: all fields filled, final inspection passed. Wrong looks like a final inspection still open a week later. Stop rule: an open final keeps the conversion's next trade from starting on anything that depends on the new capacity. Hazard: none, a desk step.

The record this produces

The upgrade file holds: the calculation and method; work order number and planner; permit number; the step 5 answers and each plan; the outage date and notice date; the dead test and the restore readings, leg by leg; inspection results. The coordinator reads it to run the next trade's start date; the next electrician reads it to know what the service is and how it was proved; the shop reads it if the household ever says nobody warned them.

Worked pass

A 100-amp to 200-amp upgrade on an overhead service, for a conversion adding a heat pump and a charger.

Steps 1 to 3: measured-demand calculation attached; work order issued with a field visit nine days out, no transformer change; permit issued in five business days. Pass.

Step 4: new meter base and mast set with the old service live; the outage sequence is estimated at six hours. Pass.

Step 5: written reply: one CPAP, used at night only, and a chest freezer. The plan on file is a midday outage with the household home by evening. Pass.

Step 6: utility date confirmed for a Tuesday at 8 am, inspection booked for 1 pm, notice sent five days ahead. Pass.

Step 7: after disconnect, zero on all pairs, meter proved on a known live source before and after. Pass.

Step 8: inspector released at 1:40 pm; utility reconnected at 2:30 pm. With the main open, L1 to neutral read 131 volts, L2 to neutral 109 volts, leg to leg 240. Failed: one leg high and one low by 11 volts each, the open-neutral signature. The main stayed open and the coordinator called the utility back. Their crew found the neutral at the weatherhead connection made up loose; they remade it and the readings came back 121 and 120 volts, 241 leg to leg. Only then did the electrician close the main and bring breakers back one at a time. Had the main been closed on the first reading, every 120-volt load on the high leg would have seen 131 volts, and any change in load would have swung it further.

Step 9: final inspection passed, readings recorded; the household had power back at 3:40 pm, inside the CPAP plan.

References

• NFPA 70, National Electrical Code, Article 230 and 110.26, in the edition adopted by your jurisdiction
• NFPA 70E Article 120 (120.5 in the 2021 edition, renumbered in 2024); 29 CFR 1910.333(b)(2) and 29 CFR 1926 Subpart K
• ANSI C84.1, Electric Power Systems and Equipment, Voltage Ratings
• CDC guidance on generator carbon monoxide safety; USDA guidance on food safety in a power outage
• See related: The Utility Service Upgrade and Its Timeline