GENERAC RTSW100J3 RTSW100J3 - ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,326.94
GENERAC RTSW100J3 RTSW100J3 - 100 Amp Service Rated 120/240 3Ø NEMA 3R

GENERAC RTSW100J3 RTSW100J3 - 100 Amp Service Rated 120/240 3Ø NEMA 3R

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Model: RTSW100J3
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$3,326.94
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RTSW100J3 - 100 Amp Service Rated 120/240 3Ø NEMA 3R

  • Certifications and Standards

    • UL Listed

  • Features

    • The controller at the generator handles all the timing, sensing, exercising functions, and transfer commands
    • Five year limited warranty
    • Service rated (RTSW) Generac Automatic Transfer Switches are housed in an aluminum NEMA/UL Type 3R enclosure with electrostatically applied powder coating
    • The Heavy Duty Generac Contactor is UL recognized device, designed for years of service
    • 100 Amp Service Rated 120/240 3Ø


RTSW100J3 - spec sheet

Manufacturer Resources

Product Specs

Amperage:
100 A
Assembled Depth:
10.06 in
Assembled Height:
48 in
Assembled Weight:
50 lbs
Assembled Width:
21.82 in
Color Finish:
grey
Country Of Origin:
United States
Installation Hardware Included:
Yes
Installation Instructions Included:
Yes
Manufacturer Warranty:
5 year limited
Maximum Generator Input:
22000 W
Overall Depth:
10.06 in
Overall Height:
48 in
Overall Width:
21.82 in
Restrictions:
No
Department:
Electrical
Product Group:
Power Distribution
Product Subgroup:
Transfer Switch
Product Voltage:
240 V
Product Material:
Aluminum
Product Weight:
50 lbs

Generac RTSW100J3 – Frequently Asked Questions

1) Can the Generac RTSW100J3 transfer switch be mounted outdoors?
Yes. The RTSW100J3 is built in an aluminum NEMA/UL Type 3R enclosure with an electrostatically applied powder coat, so it is rated for outdoor wall mounting. Aluminum construction also helps in coastal or damp locations where a painted steel box corrodes at the seams. Finish is grey.
2) What size generator will the Generac RTSW100J3 handle?
The RTSW100J3 accepts a maximum generator input of 22,000 watts (22 kW) at 100 amps, 120/240 volts three phase. Size the generator at or below 22 kW; a larger unit needs a higher-rated switch.
3) Will a Generac RTSW100J3 work on my single phase 120/240 house service?
No. The RTSW100J3 is configured for 120/240 volt three phase service at 100 amps. A residential or light commercial single phase service needs the single phase version of the RTSW 100 amp switch instead. Check the service conductors and the utility meter configuration before ordering this one.
4) Does a service rated transfer switch like the RTSW100J3 replace my main disconnect?
That is the point of the service rated (RTSW) designation. A service rated switch is listed as service equipment, so it can be installed as the service disconnecting means ahead of the panel rather than downstream of a separate main breaker. That removes one enclosure from the wall and one set of conductors from the job. Non-service-rated switches have to sit behind an existing main disconnect.
5) Does the Generac RTSW100J3 need its own controller or exercise timer?
No separate controller is needed. On the RTSW switches all timing, utility sensing, weekly exercise and transfer commands are handled by the controller on the Generac generator itself, so the switch carries the contactor and the control wiring back to the genset. That also means it is intended to pair with a Generac standby unit, not with any arbitrary generator.
6) How much wall space do I need for the Generac RTSW100J3?
Plan for a box 48 inches tall, 21.82 inches wide and 10.06 inches deep, weighing 50 pounds. The height is the thing that catches people out on retrofits, so check clearance above the meter and keep the required working space in front of the enclosure clear.
7) What exact part number should I put on the purchase order for the Generac 100 amp three phase service rated transfer switch?
Order Generac MPN RTSW100J3. That is the 100 amp, 120/240 volt three phase, service rated automatic transfer switch in the NEMA 3R aluminum enclosure. The J3 suffix is what distinguishes the three phase build from the single phase RTSW 100 amp models, so do not drop it on the order.
8) Does the RTSW100J3 come with mounting hardware and instructions, or do I need to source them?
Mounting hardware and installation instructions both ship with the switch, so the only extras for a typical install are conduit, fittings, conductors and the control cable run to the generator. The unit is made in the United States.
How fast can I get the Generac RTSW100J3 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Generac RTSW100J3 come with a warranty?
Absolutely. The Generac RTSW100J3 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Generac RTSW100J3?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Generac RTSW100J3 from ZenSupply?
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