Cummins OTEC 400 Amp Indoor Transfer Switch A075F133
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#OTEC400 A075F133
Cummins OTEC transfer switches are designed for operation and switching of electrical loads between primary power and standby generator sets. They are suitable for use in emergency, legally required, and optional standby applications. The switches monitor both power sources, signal generator set startup, automatically transfer power, and return the load to the primary power source once a stable utility is available.
Key features
-
-
High Capacity: With a robust 400 Amp rating, this transfer switch is designed for demanding applications, ensuring efficient power distribution.
-
Indoor Installation: The transfer switch is housed in an enclosure suitable for indoor installations, providing protection and reliability in controlled environments.
-
PowerCommand Controller: Equipped with the advanced PowerCommand controller, offering precise control and monitoring capabilities for optimized performance.
-
Seamless Transitions: The automatic transfer functionality ensures smooth and swift transitions between power sources during outages, maintaining uninterrupted power supply.
-
Versatile Applications: Tailored for diverse applications, the OTEC 400 is suitable for a range of industries, including commercial, industrial, and institutional settings.
-
Built for Reliability: Crafted under the Cummins brand, known for its commitment to quality and reliability, the OTEC 400 exemplifies industry-leading standards in power generation.
-
Compliance and Safety: Adhering to industry standards, the transfer switch prioritizes safety and compliance, providing peace of mind in critical power scenarios.
-
User-Friendly Interface: Featuring a user-friendly interface, the OTEC 400 ensures ease of operation and monitoring, enhancing the overall user experience.
-
Specification
- Current Rating: 400 Amp
- Voltage Rating: 240 Volts
- Phase: 1-Phase
- Number of Poles: 3
- Enclosure Type: NEMA 1 (Indoor use, provides basic protection against dust and indirect contact with liquids)
Document Library
Wiring Diagram,Transfer Switch
Wiring Diagram,Interconnection
Normal Withstand Ratings(Fuse and CB Protection)
Special Withstand Ratings(CB Protection)
NEW Wiring Diagram,Transfer Switch
NEW Wiring Diagram,Interconnection
Shipping Policy
Our goal is to get your parts and products to you as efficiently and safely as possible. The guidelines below outline what you can expect about fulfillment, shipping, and eligible products.
Shipping and Order Fulfillment Guidelines
Order Fulfillment: Orders usually ship within 1-5 business days. Shipments generally arrive in 1-3 business days after leaving our facilities. Please note that no orders will be fulfilled on Saturday or Sunday; instead, they will be fulfilled the next business day.
Pick Up: You may choose to pick-up your order at no cost from any of our listed locations in the USA and Canada. As soon as the order is ready for pick-up, we will send you an email. Your order should be ready for pickup within 2 – 3 business days, depending on the availability of parts.
Shipping Address: Your shipping address may be either a residential or commercial address in the United States and Canada. We do not ship to P.O. Box addresses, and we do not ship to any addresses outside the USA and Canada.
Method of Shipping: Standard ground shipping is the default shipping method for the USA and Canada.* Once your product is shipped, it should take 1–3 business days for delivery. Standard shipping to Alaska and Hawaii typically takes 14–21 business days.
* Exceptions may apply in shipping to some states in the USA. Currently, Build the Power does not offer shipping to US territories, Nunavut, Northwest Territories or Yukon.
Shipping Fees
Free Shipping: We offer free shipping on all orders.
Eligible Products
All products are eligible for Standard Free Shipping except for the product categories listed below. These products are eligible for Store Pick-Up Only:
Dangerous or hazardous goods, such as batteries.
Products that require special handling, such as a pail of oil or coolant.
Returns and Refunds Policy
We are committed to providing a straightforward, hassle-free return process. Please read our policy to be sure your order qualifies.
If your product was damaged in shipping, or if you received an incorrect part please contact us so that we can assist you. Do not initiate a return for such orders.
Return Guidelines
Return Initiation
Your return must be initiated on Build the Power website. Please do not take your parts to a store without initiating the return online first as your returns will not be accepted.
Return Timeline
Eligible part returns can be initiated for up to 30 days from the shipment or pickup availability date. Returns must be received by the return location within 14 days of return initiation.
Return Method
You may return products either in-store to your original pickup location, or through mail. Drop off returns are only available if you picked up your products at a branch.
In-Store Return: Available only for pickup orders. You will need to initiate the return online first. Look up your order using your Order Number and email address and identify the product(s) you would like to return. You will then have the option to return the product(s) to your original pickup location. You will be issued a Return Confirmation email as soon as you submit your return request. Please bring a copy of the packing slip from your return order along with the products. Note: If you purchased as a signed in user, make sure to sign into your account first.
Mail-In Return: You will need to initiate the return online first. Look up your order using your Order Number and email address and identify the product(s) you would like to return. You will be issued a Return Confirmation email as soon as you submit your return request. Include the packing slip with your parts that are being returned.
Product Condition
Products purchased on buildthepower.com must be returned in saleable condition — in other words, unused, in the original packaging, and undamaged. Please note, all accepted returns will incur a 15% handling fee.
Products that are Not Eligible for Return
-Superseded and obsolete products or parts.
-Parts that were not purchased through the Build the Power.
-Parts not purchased from Build the Power and non-stocking parts.
-Piston pins except as part of piston or cylinder kits.
-Electronics (including but not limited to sensors)
-Hazardous materials such as paints, sealants, flush kits, lubricants, spray cleaners and other materials.
-Consumable products.
-Software.
-Make-to-Order and Customized items (calibrated fuel pumps, custom specified radiators / alternators / mufflers /adapters / etc.)
-Belts, service tools, and rebuilt or non-genuine parts.
-Printed circuit boards and other electronic components that were shipped in anti-static packaging which have been opened.
Refund Policy
Handling Fees
All accepted parts returns will incur a 15% handling fee.
Return Label
You will be responsible for shipping the return package to the appropriate location. For US returns, we recommend you ship via FedEx to avoid potential delays. If you are returning a product because an incorrect part was shipped, or the product was damaged in shipping please contact us so that we can assist you.
Refund Timeline
Once we have approved the return, a refund will be issued within 7-10 business days.
Warranty
2 years factory warranty.
Description
#OTEC400 A075F133
Cummins OTEC transfer switches are designed for operation and switching of electrical loads between primary power and standby generator sets. They are suitable for use in emergency, legally required, and optional standby applications. The switches monitor both power sources, signal generator set startup, automatically transfer power, and return the load to the primary power source once a stable utility is available.
Key features
-
-
High Capacity: With a robust 400 Amp rating, this transfer switch is designed for demanding applications, ensuring efficient power distribution.
-
Indoor Installation: The transfer switch is housed in an enclosure suitable for indoor installations, providing protection and reliability in controlled environments.
-
PowerCommand Controller: Equipped with the advanced PowerCommand controller, offering precise control and monitoring capabilities for optimized performance.
-
Seamless Transitions: The automatic transfer functionality ensures smooth and swift transitions between power sources during outages, maintaining uninterrupted power supply.
-
Versatile Applications: Tailored for diverse applications, the OTEC 400 is suitable for a range of industries, including commercial, industrial, and institutional settings.
-
Built for Reliability: Crafted under the Cummins brand, known for its commitment to quality and reliability, the OTEC 400 exemplifies industry-leading standards in power generation.
-
Compliance and Safety: Adhering to industry standards, the transfer switch prioritizes safety and compliance, providing peace of mind in critical power scenarios.
-
User-Friendly Interface: Featuring a user-friendly interface, the OTEC 400 ensures ease of operation and monitoring, enhancing the overall user experience.
-
Specification
- Current Rating: 400 Amp
- Voltage Rating: 240 Volts
- Phase: 1-Phase
- Number of Poles: 3
- Enclosure Type: NEMA 1 (Indoor use, provides basic protection against dust and indirect contact with liquids)
Document Library
Wiring Diagram,Transfer Switch
Wiring Diagram,Interconnection
Normal Withstand Ratings(Fuse and CB Protection)
Special Withstand Ratings(CB Protection)
NEW Wiring Diagram,Transfer Switch
NEW Wiring Diagram,Interconnection
Shipping Policy
Our goal is to get your parts and products to you as efficiently and safely as possible. The guidelines below outline what you can expect about fulfillment, shipping, and eligible products.
Shipping and Order Fulfillment Guidelines
Order Fulfillment: Orders usually ship within 1-5 business days. Shipments generally arrive in 1-3 business days after leaving our facilities. Please note that no orders will be fulfilled on Saturday or Sunday; instead, they will be fulfilled the next business day.
Pick Up: You may choose to pick-up your order at no cost from any of our listed locations in the USA and Canada. As soon as the order is ready for pick-up, we will send you an email. Your order should be ready for pickup within 2 – 3 business days, depending on the availability of parts.
Shipping Address: Your shipping address may be either a residential or commercial address in the United States and Canada. We do not ship to P.O. Box addresses, and we do not ship to any addresses outside the USA and Canada.
Method of Shipping: Standard ground shipping is the default shipping method for the USA and Canada.* Once your product is shipped, it should take 1–3 business days for delivery. Standard shipping to Alaska and Hawaii typically takes 14–21 business days.
* Exceptions may apply in shipping to some states in the USA. Currently, Build the Power does not offer shipping to US territories, Nunavut, Northwest Territories or Yukon.
Shipping Fees
Free Shipping: We offer free shipping on all orders.
Eligible Products
All products are eligible for Standard Free Shipping except for the product categories listed below. These products are eligible for Store Pick-Up Only:
Dangerous or hazardous goods, such as batteries.
Products that require special handling, such as a pail of oil or coolant.
Returns and Refunds Policy
We are committed to providing a straightforward, hassle-free return process. Please read our policy to be sure your order qualifies.
If your product was damaged in shipping, or if you received an incorrect part please contact us so that we can assist you. Do not initiate a return for such orders.
Return Guidelines
Return Initiation
Your return must be initiated on Build the Power website. Please do not take your parts to a store without initiating the return online first as your returns will not be accepted.
Return Timeline
Eligible part returns can be initiated for up to 30 days from the shipment or pickup availability date. Returns must be received by the return location within 14 days of return initiation.
Return Method
You may return products either in-store to your original pickup location, or through mail. Drop off returns are only available if you picked up your products at a branch.
In-Store Return: Available only for pickup orders. You will need to initiate the return online first. Look up your order using your Order Number and email address and identify the product(s) you would like to return. You will then have the option to return the product(s) to your original pickup location. You will be issued a Return Confirmation email as soon as you submit your return request. Please bring a copy of the packing slip from your return order along with the products. Note: If you purchased as a signed in user, make sure to sign into your account first.
Mail-In Return: You will need to initiate the return online first. Look up your order using your Order Number and email address and identify the product(s) you would like to return. You will be issued a Return Confirmation email as soon as you submit your return request. Include the packing slip with your parts that are being returned.
Product Condition
Products purchased on buildthepower.com must be returned in saleable condition — in other words, unused, in the original packaging, and undamaged. Please note, all accepted returns will incur a 15% handling fee.
Products that are Not Eligible for Return
-Superseded and obsolete products or parts.
-Parts that were not purchased through the Build the Power.
-Parts not purchased from Build the Power and non-stocking parts.
-Piston pins except as part of piston or cylinder kits.
-Electronics (including but not limited to sensors)
-Hazardous materials such as paints, sealants, flush kits, lubricants, spray cleaners and other materials.
-Consumable products.
-Software.
-Make-to-Order and Customized items (calibrated fuel pumps, custom specified radiators / alternators / mufflers /adapters / etc.)
-Belts, service tools, and rebuilt or non-genuine parts.
-Printed circuit boards and other electronic components that were shipped in anti-static packaging which have been opened.
Refund Policy
Handling Fees
All accepted parts returns will incur a 15% handling fee.
Return Label
You will be responsible for shipping the return package to the appropriate location. For US returns, we recommend you ship via FedEx to avoid potential delays. If you are returning a product because an incorrect part was shipped, or the product was damaged in shipping please contact us so that we can assist you.
Refund Timeline
Once we have approved the return, a refund will be issued within 7-10 business days.
Warranty
2 years factory warranty.
what’s included
The E2000LFP Expandable Power Station combines power and flexibility in a portable package. Link it with two EB3000 battery packs to reach an impressive 8064Wh capacity - enough for almost any power need.
With 2000W AC output, it runs most household devices and tools without breaking a sweat. The advanced LiFePo4 batteries deliver outstanding durability, keeping 80% capacity even after 3500 charging cycles.
Charging is quick and flexible. The station accepts up to 1300W input across multiple ports, with 600W maximum solar input. Using solar panels, you'll fully charge in 2-3 hours. Need it faster? Dual AC adapters cut that time to just 1.5-2 hours.
Specification
The E2000LFP Expandable Power Station combines power and flexibility in a portable package. Link it with two EB3000 battery packs to reach an impressive 8064Wh capacity - enough for almost any power need.
With 2000W AC output, it runs most household devices and tools without breaking a sweat. The advanced LiFePo4 batteries deliver outstanding durability, keeping 80% capacity even after 3500 charging cycles.
Charging is quick and flexible. The station accepts up to 1300W input across multiple ports, with 600W maximum solar input. Using solar panels, you'll fully charge in 2-3 hours. Need it faster? Dual AC adapters cut that time to just 1.5-2 hours.
Shipping & Delivery
The E2000LFP Expandable Power Station combines power and flexibility in a portable package. Link it with two EB3000 battery packs to reach an impressive 8064Wh capacity - enough for almost any power need.
With 2000W AC output, it runs most household devices and tools without breaking a sweat. The advanced LiFePo4 batteries deliver outstanding durability, keeping 80% capacity even after 3500 charging cycles.
Charging is quick and flexible. The station accepts up to 1300W input across multiple ports, with 600W maximum solar input. Using solar panels, you'll fully charge in 2-3 hours. Need it faster? Dual AC adapters cut that time to just 1.5-2 hours.
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Step 1: Choose Your System
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Step 2: Place Your Order
Quick online checkout with free U.S. shipping. Your order ships within 3-5 business days.

Step 3: Power Up
Professional guidance for setup and connection. Our team helps you get the most from your power station.
The Build The Power Difference
Here’s why you’ll prefer us over other providers.
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What Our Customers Say
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Frequently Asked Questions
How is Build The Power different from other companies?
Unlike traditional companies, we've removed the complex network of salespeople, project managers, and dealer fees. You browse and buy directly through our digital platform, cutting costs by 20-50% while still getting expert support when you need it.
How does your ordering process work?
Browse & Select – Find the product that suits your needs.Add to Cart – Click "Add to Cart" and proceed to checkout. Secure Payment – Complete your purchase using our secure payment options. Order Confirmation – You’ll receive an email confirmation with your order details. Shipping & Delivery – We process and ship your order as quickly as possible. A tracking number will be provided. If you have any questions, feel free to contact us!
Do you offer free shipping?
Yes! We offer free shipping on all orders, with no minimum purchase required. Enjoy hassle-free shopping without worrying about extra shipping costs. Once your order is processed, we’ll provide a tracking number so you can follow your shipment’s progress.
What's your return policy?
We offer a 30-day return policy for your peace of mind. If you're not completely satisfied with your purchase, you can return it within 30 days of delivery for a refund or exchange. The item must be in its original condition and packaging.
To start a return, contact our support team, and we’ll guide you through the process.
Can I get help with installation?
We do not offer installation services, but we’re happy to recommend trusted companies or services that can assist you. If you need help finding an installer, feel free to contact us, and we’ll point you in the right direction!