GENERAC RTSN800K3 RTSN800K3 - ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$10,226.10
GENERAC RTSN800K3 RTSN800K3 - 800 Amp Transfer Switch 277/480 3Ø NEMA 3R CUL

GENERAC RTSN800K3 RTSN800K3 - 800 Amp Transfer Switch 277/480 3Ø NEMA 3R CUL

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Model: RTSN800K3
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$10,226.10
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RTSN800K3 - 800 Amp Transfer Switch 277/480 3Ø NEMA 3R CUL

  • Certifications and Standards

    • UL Listed

  • Features

    • 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
    • The Heavy Duty Generac Contactor is a cUL recognized device, designed for years of service
    • Three-phase, 277/480-volt; cUL listed
    • 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
    • Designed for use with three-phase generators 150-kw and below
    • RTSN800K3
    • Generac Automatic Transfer Switches are housed in an aluminum NEMA/UL Type 3R enclosure, with electrostatically applied and baked powder paint

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 RTSN800K3 – Frequently Asked Questions

1) Can the Generac RTSN800K3 transfer switch be mounted outdoors?
Yes. The RTSN800K3 comes in an aluminum NEMA/UL Type 3R enclosure with electrostatically applied and baked powder paint, which is the rating for outdoor rain-tight service, so it can go on an exterior wall or pad next to the generator. The aluminum shell in a grey finish also avoids the corrosion issues you get with painted steel in coastal or wash-down locations.
2) What size generator does the Generac RTSN800K3 automatic transfer switch work with?
It is built for three-phase generators of 150 kW and below at 277/480 volts. If your set is single-phase, or three-phase above 150 kW, this is not the right switch for the job.
3) How much wall or pad space do I need for the RTSN800K3 transfer switch, and can one person hang it?
Plan for a unit measuring 52 inches high, 25 inches wide and 17 inches deep. It weighs 130 pounds, so it is a two-person lift or a hoist, and the mounting surface and anchors have to carry that plus the conductor weight coming into the box.
4) Can the Generac RTSN800K3 shed HVAC loads without adding extra control hardware?
Yes. Digital Power Technology built into the switch manages up to four individual HVAC loads controlled at 24 VAC with no additional hardware, so you wire the thermostat control legs through the switch rather than buying separate contactors or relays.
5) How do I manage more than four loads on a Generac RTSN800K3 installation?
Add Smart Management Modules. Used with the RTSN800K3, they take total managed loads up to eight, which is the route to take when the four native 24 VAC HVAC channels are not enough for the building. The modules are a separate purchase and are not in the box with the switch.
6) What comes in the box with the Generac RTSN800K3, and what will my electrician still need?
You get the transfer switch itself along with installation instructions. Conductors, conduit, breakers, the generator control wiring and any Smart Management Modules are all separate. Nothing in the package substitutes for a licensed electrician sizing the feeders for the service.
7) Where is the Generac RTSN800K3 made? I have domestic sourcing requirements.
Country of origin on the RTSN800K3 is the United States. For a government or institutional bid with domestic content language, that is the sourcing answer you take to the submittal.
8) What is the exact part number to order for the Generac 277/480 three-phase NEMA 3R transfer switch?
Order it as Generac RTSN800K3. That single model number covers the whole configuration: three-phase 277/480 volt, aluminum NEMA 3R outdoor enclosure, with the Digital Power Technology load management built in. There are no separate handing, finish or trim options to specify.
How fast can I get the Generac RTSN800K3 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 RTSN800K3 come with a warranty?
Absolutely. The Generac RTSN800K3 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 RTSN800K3?
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 RTSN800K3 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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