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OTEC 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 energizes 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 economize.

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
$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

Not sure which? Call (214) 957-4307

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.

OTEC 600A by configuration

Cummins OTEC600 600A 3Ph-120/208V

Non-service-entrance, three phase, 120/208V. 2 cabinet options:

  • Part A075F139, NEMA 1 indoor cabinet, 322 lb, 54 x 25.5 x 18 in: $8,545.17
  • Part A075F142, NEMA 3R outdoor cabinet, 415 lb, 59 x 27.5 x 16.5 in: $9,826.31

Cummins OTEC600 600A 3Ph-120/240V

Non-service-entrance, three phase, 120/240V. 2 cabinet options:

  • Part A075F140, NEMA 1 indoor cabinet, 322 lb, 54 x 25.5 x 18 in: $8,545.17
  • Part A075F143, NEMA 3R outdoor cabinet, 415 lb, 59 x 27.5 x 16.5 in: $9,826.31

Cummins OTEC600 600A 3Ph-277/480V

Non-service-entrance, three phase, 277/480V. 2 cabinet options:

  • Part A075F141, NEMA 1 indoor cabinet, 322 lb, 54 x 25.5 x 18 in: $8,545.17
  • Part A075F144, NEMA 3R outdoor cabinet, 415 lb, 59 x 27.5 x 16.5 in: $9,826.31

Cummins OTEC600 600A 1Ph-120/240V

Non-service-entrance, single phase, 120/240V. 2 cabinet options:

  • Part A075F145, NEMA 1 indoor cabinet, 322 lb, 54 x 25.5 x 18 in: $8,545.17
  • Part A075F146, NEMA 3R outdoor cabinet, 415 lb, 59 x 27.5 x 16.5 in: $9,826.31

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 100kW liquid-cooled Diesel standby generator

Cummins C100D6C — Enclosed

Liquid-cooled · Diesel

Equipment from
$36,335.68

Equipment only. Installation quoted after a free site survey.

View details
Cummins RS100 100kW liquid-cooled Natural Gas / LP Vapor standby generator

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 details

What 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.

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.

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.

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