What is the Generac RTSN100J3 transfer switch used for?

The Generac RTSN100J3 is a 100-amp automatic transfer switch designed to safely connect a standby generator to a home or small commercial electrical system during power outages.

Is the Generac RTSN100J3 compatible with 120/240V systems?

Yes, this transfer switch supports 120/240V single-phase systems, making it suitable for most residential and light commercial generator installations.

What does NEMA 3 rating mean on the RTSN100J3?

A NEMA 3 enclosure provides protection against rain, sleet, and external ice, allowing the transfer switch to be installed outdoors in exposed environments.

Can the RTSN100J3 be used with three-pole generator setups?

Yes, the RTSN100J3 is a 3-pole transfer switch, designed to handle neutral switching for improved safety and system reliability.

Is professional installation required for the Generac RTSN100J3?

Professional installation by a licensed electrician is strongly recommended to ensure proper wiring, code compliance, and safe operation.

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Generac TRANS SW 100A 120/240 3P NEMA3 - RTSN100J3

Generac TRANS SW 100A 120/240 3P NEMA3 - RTSN100J3

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Generac TRANS SW 100A 120/240 3P NEMA3 - RTSN100J3

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SKU PES-PA-ELC-1764

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$904.46 USD

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SKU: PES-PA-ELC-1764
MPN: RTSN100J3

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Generac TRANS SW 100A 120/240 3P NEMA3 - RTSN100J3 $904.46

Specifications

Amperage 100A

NEMA Rating NEMA 3

What is your return policy?

Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

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Our returns policy covers all purchases made through Portlandia Electric Supply. For warranty issues, as authorized distributors, we honor the full manufacturer warranty of ALL the brands on our website. See our complete returns and warranty policies on our Shipping, Deliver, and Returns page.

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All orders are processed within 72 hours and you can expect delivery on most orders within 5-7 business days. You will receive access to our customer portal after ordering, where it is easy to track all your shipments. See our Shipping, Delivery and Returns page for more details.

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You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

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Generac TRANS SW 100A 120/240 3P NEMA3 - RTSN100J3

The Generac TRANS SW 100A 120/240 3P NEMA3 (RTSN100J3) is a 100 Amp transfer switch designed for 3-phase power systems operating at 120/240V. This unit is perfect for managing power transfer between utility and backup generators in commercial and industrial settings. Its NEMA 3R-rated enclosure ensures it is well-suited for outdoor use, protecting the system from environmental elements.

Key Features

100 Amp capacity for medium-sized commercial and industrial systems
120/240V, 3-phase compatibility for flexible power distribution
NEMA 3R-rated for outdoor protection from weather and dust
Reliable, durable design for long-lasting use

Specifications

MPN	RTSN100J3
Vendor	Generac
Amperage	100 Amps
Voltage	120/240V
Enclosure Rating	NEMA 3R
Phase Type	3-Phase
Application	Power Transfer for Commercial/Industrial Applications

Installation & Application

Warranty & Compliance

Compliant with UL and NEC standards for electrical systems
Backed by Generac’s standard warranty for reliable operation and peace of mind

What is your return policy?

What’s covered by your return policy?

How long will it take to receive my order?

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Generac TRANS SW 100A 120/240 3P NEMA3 - RTSN100J3

Key Features

100 Amp capacity for medium-sized commercial and industrial systems
120/240V, 3-phase compatibility for flexible power distribution
NEMA 3R-rated for outdoor protection from weather and dust
Reliable, durable design for long-lasting use

Specifications

MPN	RTSN100J3
Vendor	Generac
Amperage	100 Amps
Voltage	120/240V
Enclosure Rating	NEMA 3R
Phase Type	3-Phase
Application	Power Transfer for Commercial/Industrial Applications

Installation & Application

Warranty & Compliance

Compliant with UL and NEC standards for electrical systems
Backed by Generac’s standard warranty for reliable operation and peace of mind

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