Cummins RS17A
Air-cooled · Natural Gas / LP Vapor
Dallas County · Texas
Generator installation in Richardson, TX
A typical 20kW Cummins whole-house generator installed in Richardson is estimated at $13,500–$17,000. Estimate only. Every installation is different; a site visit is required to determine whether your installation will cost less or more than this estimate. The RS20A unit alone is $5,925.25. We pull the Richardson permit and meet the inspector. Electric delivery is Oncor Electric Delivery; natural gas is Atmos Energy.
Authorized Cummins dealer · TECL #40628 · our own electricians, no subcontracted electrical work
Richardson at a glance
| County | Dallas County |
|---|---|
| Electric delivery | Oncor Electric Delivery |
| Natural gas | Atmos Energy |
| Typical 20kW installed | $13,500 – $17,000 Estimate only; installations vary, and a site visit determines your price. |
| Site survey | Free, about 45 minutes |
Permits and inspection in Richardson
Separate single-trade electrical and plumbing permits. Each licensed contractor pulls their own and owns their own inspections, so nobody is waiting on a single general permit to clear.
Richardson builds to the 2021 International codes with the 2020 National Electrical Code and regional amendments. Prosper, by contrast, adopted the 2023 NEC, and the two editions differ on parts of the transfer switch and disconnect rules.
State law limits what Richardson may require on a home system of 50kW or less, and a qualified third party may do the review and inspection instead: Texas Local Government Code § 229.102 and Texas Local Government Code § 247.0025. Your HOA cannot ban the generator either (Property Code § 202.019).
Utilities that affect your install
Electric delivery across Richardson is Oncor Electric Delivery, so one meter standard applies at every address. That decides how the transfer switch ties in at the meter and whether a service-entrance rated switch is the cleaner path.
Natural gas is Atmos Energy. If the meter cannot carry the generator on top of the furnace, water heater and other appliances, the utility has to upsize it, which is a separate request with its own timeline. How gas line sizing works.
Already have solar? It has to connect on the utility side of the transfer switch so the generator never feeds the inverters, and the disconnect and meter rules come from Oncor Electric Delivery. Why, and how the main DFW utilities handle it.
Who does the work
UTS ElectricPros is the authorized Cummins dealer. Installation is done by our own electricians working as Clements Electric, our dba, from 2100 S Great Southwest Pkwy, Suite 505, Grand Prairie, under TECL #40628. The installation process runs survey, written price, permit, install, inspection and commissioning under load.
Our installation crews work under the Clements Electric name, which also covers repairs, maintenance and other electrical work in Richardson. Clements Electric standby generator installation and service in Richardson.
Popular in Richardson
Cummins RS20AC
Air-cooled · Natural Gas / LP Vapor
ATS included
Cummins RS13A
Air-cooled · Natural Gas / LP Vapor
Other Cummins equipment for Richardson
Installed in Richardson: Home standby generators · Light commercial diesel generators · Agricultural standby generators · Automatic transfer switches
Shipped to Richardson, no installation needed: Portable generators · RV generators · Mobile trailer-mounted diesel generators
Generator questions from Richardson homeowners
How much does a whole house generator cost in Richardson?
A typical 20kW Cummins system installed in Richardson is estimated at $13,500 to $17,000, including the pad, transfer switch, permit and commissioning, with the gas line included as its own line item. Estimate only. Every installation is different; a site visit is required to determine whether your installation will cost less or more than this estimate. The RS20A unit itself is $5,925.25. Your figure depends on the distance from the generator to the gas meter and the electrical panel and on whether the gas meter needs upsizing, so it is fixed in writing after a free survey.
Do I need a permit for a generator in Richardson?
Yes. Separate single-trade electrical and plumbing permits. Each licensed contractor pulls their own and owns their own inspections, so nobody is waiting on a single general permit to clear. We pull the permit and meet the inspector, and it is inside the installation quote.
Can Richardson regulate my home generator install?
Only within limits. Texas Local Government Code § 229.102 bars a city from regulating the installation or inspection of a residential backup system of 50kW or less where the city does not own the electric utility. Since 2025, Texas Local Government Code § 247.0025 also lets a qualified third party do the plan review and inspection, and the city must then issue the permit by the third business day after notice.
Who provides gas and electric service in Richardson?
Electric delivery is Oncor Electric Delivery. Natural gas is Atmos Energy. The electric utility sets how the transfer switch ties in at the meter; the gas utility decides whether your meter can carry the generator's extra demand. Service territory does not follow city limits, so we confirm both from your bill before quoting.
Who installs the generator in Richardson?
Our own licensed electricians, working as Clements Electric, the dba of UTS ElectricPros, LLC, from 2100 S Great Southwest Pkwy, Suite 505, Grand Prairie, under TECL #40628. The gas line is run by a licensed plumber we hire and warrant, or by your own plumber if you prefer. UTS ElectricPros is the authorized Cummins dealer, so the same company sells, installs and handles the warranty.