GENERAC RTSN400G3 RTSN400G3 - ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,745.13
GENERAC RTSN400G3 RTSN400G3 - 400 Amp Transfer Switch 120/208 3Ø NEMA 3R CUL

GENERAC RTSN400G3 RTSN400G3 - 400 Amp Transfer Switch 120/208 3Ø NEMA 3R CUL

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Model: RTSN400G3
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$3,745.13
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RTSN400G3 - 400 Amp Transfer Switch 120/208 3Ø NEMA 3R CUL

  • Certifications and Standards

    • UL Listed

  • Features

    • Digital Power Technology (DPM) allows these switches to have the capability to manage up to 4 individual HVAC (24 VAC controlled) loads with no additional hardware
    • Generac Automatic Transfer Switches are housed in an aluminum NEMA/UL Type 3R enclosure, with electrostatically applied and baked powder paint
    • The Heavy Duty Generac Contactor is a cUL recognized device, designed for years of service
    • Designed for use with three-phase generators 60-kw and below
    • When used in tandem with Smart Management Modules, up to 8 loads can be managed as well, providing the most installation efficient power management options available
    • Three-phase, 120/208-volt; cUL listed
    • RTSN400G3

Manufacturer Resources

Product Specs

Amperage:
400 A
Assembled Weight:
130 lbs
Color Finish:
Grey
Country Of Origin:
United States
Installation Hardware Included:
transfer switch
Installation Instructions Included:
Yes
Manufacturer Warranty:
5 year limited
Maximum Generator Input:
48000 W
Overall Depth:
17 in
Overall Height:
52 in
Overall Width:
25 in
Restrictions:
No
Department:
Electrical
Product Group:
Power Distribution
Product Subgroup:
Transfer Switch
Product Voltage:
120 V
Product Material:
Aluminum
Product Weight:
130 lbs

Generac RTSN400G3 – Frequently Asked Questions

1) Will the Generac RTSN400G3 work with a single-phase 240V generator and service?
No. The RTSN400G3 is a three-phase 120/208-volt transfer switch, built for use with three-phase generators 60 kW and below. On a single-phase 240V residential or light commercial service it is the wrong switch entirely. Check the service voltage at the panel before you order.
2) Can the RTSN400G3 transfer switch be mounted outdoors?
Yes. The 400 amp Generac automatic transfer switch comes in an aluminum NEMA/UL Type 3R enclosure with electrostatically applied, baked powder paint in grey, which is rated for outdoor rain-tight service. Aluminum construction also avoids the rust problems a painted steel can has on a coastal or wash-down wall.
3) How much wall space do I need to hang a Generac RTSN400G3 400 amp transfer switch?
Plan the wall for a cabinet 52 inches high, 25 inches wide and 17 inches deep, plus your own working clearance in front. It weighs 130 lbs, so it is a two-man lift onto the mounting hardware, or a one-man job with a hoist.
4) What size generator can I connect to the Generac RTSN400G3?
The switch takes a maximum generator input of 48,000 watts and is specified for three-phase generators 60 kW and below. Size the set to the load you actually intend to carry, not to the 400 amp rating of the switch itself.
5) Do I need extra load-shed hardware to keep rooftop HVAC units from overloading the generator?
Not for the first four. Digital Power Technology is built into the switch and manages up to 4 individual HVAC loads (24 VAC controlled) with no additional hardware. If you need more than that, adding Generac Smart Management Modules takes the total to 8 managed loads.
6) Is the Generac RTSN400G3 transfer switch listed for use on a commercial job?
It is UL Listed and cUL listed, and the heavy duty Generac contactor inside is a cUL recognized device. That covers both US and Canadian installs on the 120/208 three-phase services it is built for.
7) What comes in the box with the RTSN400G3, and what do I still have to supply?
You get the transfer switch itself with its mounting hardware and installation instructions. Conductors, conduit, breakers, the generator, and any Smart Management Modules for loads beyond the four HVAC circuits the switch handles on its own are all separate.
8) Is the RTSN400G3 a service-entrance rated switch or a standard automatic transfer switch?
It is a 400 amp automatic transfer switch at 120/208V three-phase. The identifying number to order by is Generac RTSN400G3, and it is made in the United States.
How fast can I get the Generac RTSN400G3 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 RTSN400G3 come with a warranty?
Absolutely. The Generac RTSN400G3 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 RTSN400G3?
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 RTSN400G3 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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