The Standby Install Permit and Inspection Sequencing SOP

Purpose

A standby install touches at least two licensed trades, one or two utilities and one or more inspectors, and each of them has to act in a fixed order. Get the order wrong and the crew arrives to set a unit on a pad nobody approved, backfills a gas trench the inspector has not seen, or finishes a perfect install that sits dead for six weeks waiting for a gas meter upgrade nobody requested. This SOP lays out that order so an install passes every inspection on the first visit and is commissioned on the day it is finished. What each jurisdiction actually requires is in Generator Codes + Permits Reference; this card is the sequence and who owns each step.

Scope

Covers: new residential and light commercial standby installs on natural gas or propane, from signed contract to closed permits.

Does not cover:

• The install work itself, which is the Whole-House Standby Generator Installation SOP.
• Commissioning detail, which is Automatic Transfer Switch Commissioning Technique and the commissioning record.
• Pipe and meter sizing math, owned by Gas Supply Sizing and Connection Standard and the pipe sizing how-to.
• Replacement of an existing unit on the same pad and fuel, where many jurisdictions still want a permit but the utility and setback steps usually fall away; run step 2 and steps 6 to 9 where they apply, and record why the others were skipped.

Roles and responsibilities

Procedure

1. Finish the design package before anything is filed. Assemble the sizing sheet from the site walk, the unit model and its spec sheet, a site sketch with measured distances from the unit to every opening, property line and meter, the transfer equipment and its location, and the total gas load in BTU per hour: the generator's full-load input plus every existing gas appliance. Acceptance: all five items present and the gas total written as a number. Wrong looks like: a sketch with no dimensions or a gas total that leaves out the existing appliances; stop, the package goes back to the project lead, because every later step is approved against it. Hazard: none at this step beyond the ordinary care of the site walk that produced it.

2. File every permit the jurisdiction asks for, by the right license. Using Generator Codes + Permits Reference for this jurisdiction, file the electrical permit (inspected against NEC Articles 445 and 702 as adopted), the gas or mechanical permit (against NFPA 54 or the International Fuel Gas Code as adopted), and any building, zoning or setback permit for the pad. Where a locality requires the license holder to pull its own trade's permit, the electrician and the gas fitter file theirs. Check homeowner association rules if the customer has one. Acceptance: each permit filed, with its number and the inspections it requires recorded on the job. Wrong looks like: a permit the shop's license class cannot pull, or a zoning setback the site sketch does not meet; stop, route to the licensed sub or revise the location with the customer before going further. Hazard: none at this step, it is office work.

3. Request gas utility capacity in writing (natural gas jobs). Send the utility the total connected load from step 1 and ask whether the existing meter and service can deliver it at the delivery pressure, or what upgrade is needed and when. Acceptance: written confirmation that the meter carries the total, or a written upgrade date. Wrong looks like: the utility reports the meter is undersized, or does not answer; stop, do not schedule the set date until the upgrade date is confirmed, because a unit installed on an undersized meter fails under load and the utility will not turn on a service it has not approved. Hazard: none at this step.

4. Schedule the propane supplier (propane jobs). The supplier sets and fills the tank. Confirm the tank size against the unit's demand at the coldest expected temperature, not only gallons on hand (see How to Check a Propane Tank for Generator Runtime and Vaporization), the tank location against the site sketch and the supplier's own setback rules, and who sets the first-stage regulator. Acceptance: tank size, location and set date confirmed in writing, set date before the gas rough. Wrong looks like: the supplier proposes a tank smaller than the demand calculation supports, or a set date after the install; stop and resolve it now, not after the unit is on the pad. Hazard: none at this step.

5. Check the pad and setbacks on site before the pad goes down. Mark the pad on the ground and measure every distance on the approved site sketch again. Call the state one-call (811) center before digging and wait for the marks. Acceptance: measured distances within the approved sketch, one-call ticket clear, marks visible. Wrong looks like: a window, vent or meter that has moved or was missed; stop, revise the location and the permit drawing before any pad work. Hazard: digging the pad base or trench near marked lines; hand-dig inside the tolerance zone the state law sets. If a gas line is struck, everyone leaves upwind, no engines started and no phones used near it, and the call to 911 and the gas utility is made from a distance.

6. Pass the rough inspection before anything is covered. With the gas line in its trench, tracer wire laid where required, conduit in place, and the gas piping under its pressure test, book the rough inspection. Nothing is backfilled until the inspector signs. Acceptance: signed rough card or portal approval for electrical and gas, pressure test held for the duration the gas permit requires. Wrong looks like: a failed item, or a trench backfilled before the visit; stop, correct and re-book, and expect to re-excavate a covered trench. Hazard: the open trench is a trip and edge hazard, so barricade it whenever unattended; a pressure test holds stored energy, so test with air or inert gas, never oxygen, and stand clear of caps and gauge fittings.

7. Set, connect and pass both finals. Set the unit, make the electrical and gas connections, and book the electrical and gas finals. Some jurisdictions and utilities release the gas meter or tag only after the gas final. Acceptance: signed final for each permit, and the meter or supplier tag released. Wrong looks like: a failed final; correct it with the unit locked out under The Generator Auto-Start Lockout Before Service SOP and re-book, and do not commission a unit and leave it in auto on a failed final. Hazard: an inspector may ask to see the unit run; keep people clear of the exhaust and hands out of the enclosure while it runs.

8. Commission. Commission per Automatic Transfer Switch Commissioning Technique, read gas pressure at the unit static and at full load, and run the CO survey at openings. Acceptance: commissioning record complete with every reading and the unit left in auto. Wrong looks like: gas pressure under the maker's spec at full load; stop, the unit stays in off until the supply is corrected. Hazard: the unit is live, starting and transferring; follow the commissioning technique's own clauses.

9. Close the permits and hand over. Confirm every permit shows closed in the jurisdiction's system, then give the customer copies of the permits, the commissioning record and the warranty registration. Acceptance: all permits closed, customer packet delivered. Wrong looks like: a permit still open months later, which surfaces when the house is sold; stop and close it before the job is invoiced as complete. Hazard: none at this step.

The record this produces

A permit log on the job: each permit's number and type, who pulled it, required inspections, dates booked and passed; the gas utility or supplier confirmation; the one-call ticket number; the pressure test record; signed inspection cards; and the closure date. The office works from it day to day, the project lead reads it before the set date, and the customer gets a copy at handover.

Worked pass: the meter that held up the set date

Job: 22 kW natural gas standby, suburban house, electrician and gas fitter subcontracted.

Step 1. Gas load: furnace 100,000, water heater 40,000, range 65,000, dryer 22,000, for 227,000 BTU per hour existing. The generator's spec sheet listed, say, 300,000 BTU per hour at full load. Total 227,000 + 300,000 = 527,000 BTU per hour. At about 1,000 BTU per cubic foot, that is about 527 cubic feet per hour.

Step 2. Electrical and gas permits filed by the license holders; no zoning permit needed at the measured setbacks.

Step 3 failed its acceptance. The utility's reply said the existing meter was rated for about 275 cubic feet per hour, roughly half the 527 needed. The stop rule triggered: the set date was not booked. The utility scheduled a meter upgrade for five weeks out; the customer was told the install would follow it.

Step 4. Not applicable, natural gas; recorded as such.

Steps 5 and 6. Pad marked and re-measured, one-call ticket clear. Gas trench open with tracer wire, pressure test held for the permit's duration, rough passed on the first visit, then backfilled.

Step 7. Unit set two days after the meter upgrade. Both finals passed the same morning.

Step 8. Pressure at the unit's test port read within the maker's spec static and at full load. CO survey clean. Left in auto.

Step 9. Both permits closed eleven days after final; packet delivered.

What the order saved. Had the crew set the unit on the original date, the house would have had a finished generator on a meter carrying about half its connected load, and the gas final could not have been signed against a meter the utility had not approved.

References

• See related: Generator Codes + Permits Reference
• See related: Gas Supply Sizing and Connection Standard
• See related: Automatic Transfer Switch Commissioning Technique
• NFPA 54 or the International Fuel Gas Code and NFPA 70 (NEC Articles 445 and 702), as adopted by your jurisdiction
• Your state's one-call (811) excavation notification law