Cummins C100D6C — Enclosed
Liquid-cooled · Diesel
Equipment from
$36,335.68
Equipment only. Installation quoted after a free site survey.
View detailsOTEC series
OTEC 600A transfer switch
The OTEC series is a commercial-grade open-transition transfer switch, available in single and three phase and in both indoor Type 1 and outdoor NEMA 3R enclosures.
600 A 3Ph1Ph 8 configurations
A transfer switch is what makes a standby generator legal and safe. It isolates your house from the utility before the generator energises anything, so the generator can never back-feed the line a utility crew is working on. It is not optional and it is not a place to economise.
The switch is sized to your electrical service, not to the generator. A 200A service takes a 200A switch whether the generator behind it is 13kW or 20kW. That is why we confirm your service size at the site survey before specifying one — ordering to the generator instead of the service is the most common and most expensive mistake on these jobs.
From
Not sure which? Call (214) 957-4307
$8,545.17
Equipment only, 8 configurations. Installation quoted with your generator.
The OTEC 600A is sold by UTS ElectricPros, an authorized Cummins dealer in Dallas–Fort Worth. Buying through an authorized dealer is what keeps the manufacturer warranty valid — equipment bought from an unauthorized reseller frequently is not covered, and owners tend to find that out at the worst possible moment.
Part A075F139
Ships free to Texas
Typically ships in 4-13 days
The switch is sized to your electrical service, not to the generator. If you are unsure of your service size, call and we will confirm it before you order.
Every OTEC 600A configuration
| Part number | Rating | Voltage | Phase | Cabinet | Weight | Price |
|---|---|---|---|---|---|---|
| A075F139 | Non-service entrance | 208V | 3Ph | 1 | 322 lb | $8,545.17 |
| A075F140 | Non-service entrance | 240V | 3Ph | 1 | 322 lb | $8,545.17 |
| A075F141 | Non-service entrance | 480V | 3Ph | 1 | 322 lb | $8,545.17 |
| A075F142 | Non-service entrance | 208V | 3Ph | 3R | 415 lb | $9,826.31 |
| A075F143 | Non-service entrance | 240V | 3Ph | 3R | 415 lb | $9,826.31 |
| A075F144 | Non-service entrance | 480V | 3Ph | 3R | 415 lb | $9,826.31 |
| A075F145 | Non-service entrance | 240V | 1Ph | 1 | 322 lb | $8,545.17 |
| A075F146 | Non-service entrance | 240V | 1Ph | 3R | 415 lb | $9,826.31 |
Equipment only. Installation is quoted with the generator after a site survey.
What it carries
Generators a 600A switch is sized for
A rule of thumb at 240V single phase, not a specification. The switch is sized to your electrical service rather than to the generator, so the real pairing is settled at the survey — but these are the sets a 600A switch is normally seen with.
Cummins C100D6C — Enclosed + 24-Hour Tank
Liquid-cooled · Diesel
24hr tank
Equipment from
$41,963.62
Equipment only. Installation quoted after a free site survey.
View details
Cummins RS100
Liquid-cooled · Natural Gas / LP Vapor
120/240V single phase
$41,139.72
Equipment only. Installation quoted after a free site survey.
View detailsWhat it is for
The switch that makes backup power automatic
A generator with no transfer switch is a machine someone has to be at home to start, and connecting one without a switch backfeeds the utility line and endangers the crews working to restore it. The switch is what makes the whole thing legal, safe and automatic.
Why it becomes urgent
It is sized to the electrical service rather than to the generator, which is the detail most competing quotes get wrong.
Who buys it
Every permanently installed standby generator, residential or commercial.
The OTEC 600A is installed across the Dallas–Fort Worth Metroplex by our own licensed crews — the cities we serve, what installation involves, and a free on-site survey before any number is put in writing.
Before you buy the OTEC 600A
The questions that decide whether this is the right machine, answered properly rather than in a sentence on a product page.
- Do I need a service-entrance rated switch?It depends on your meter and panel, not on your generator. What the rating changes about the install.
- Who inspects the switch?A service-entrance switch changes the permit and the meter work.
- Which generator does this switch carry?Match the switch to the service size and the set it has to transfer.
All the generator guides we have written
Every Cummins automatic transfer switch, 100A to 600A · The generators this switch is sized against
Installed across Dallas–Fort Worth
The OTEC 600A ships anywhere in the country. Installation is Dallas–Fort Worth only, carried out by our own licensed crews under TECL #40628 operating from Grand Prairie — because a generator is quoted against your gas meter, your panel and your city, which nobody can do from a warehouse. What installation actually involves.
- Generator installation in ArlingtonOncor Electric Delivery
- Generator installation in McKinneyOncor, CoServ Electric or Grayson-Collin Electric Cooperative, depending on the address
- Generator installation in Grand PrairieOncor Electric Delivery
- Generator installation in SouthlakeOncor or Tri-County Electric Cooperative, depending on the address
All 27 cities we install in → · every install includes the permit, the inspection and meeting the inspector on site, and the number comes from a free on-site survey rather than a price list.
After the OTEC 600A is in
A generator is a fifteen-year relationship, not a transaction. What that looks like from here.
Cummins warranty, and ours
What the manufacturer covers, what the installer covers, and which one you call when something fails.