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Briggs & Stratton Briggs & Stratton
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SKU: 071257

Briggs & Stratton Dual 200A / Split 400A Symphony II SED Power Management Transfer Switch, Single Phase, NEMA 3R - 71257

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What's in the box

  • Briggs & Stratton Dual 200A / Split 400A Symphony II SED Power Management Transfer Switch, Single Phase, NEMA 3R - 71257

  • Product Specs

  • Product Brochure

  • Parts Manual

  • Limited Warranty (ONLY VALID IF INSTALLATION DONE BY LICENSED CONTRACTOR)

Need help with choosing a system or have other questions? Talk with one of our trusted HVAC professionals today! 678-535-7176

Email us at : sales@acunitsforless.com

Call us at : 678-535-7176

 Physical Address : Unit 1284, 2210 Holly Springs Parkway, Holly Springs, Georgia 30142, United States
  • Factory Warranty
  • Secure Checkout
  • 60-Day Returns*
  • Pro Support
  • Authorized Dealer

Tags: Service-400a

Shipping Policy

Once you place an order on AC units for less, we will promptly reach out to express our gratitude for your purchase and address any inquiries you may have. Our team will also review your order with you to ensure that you have selected the right equipment for your specific needs.

Order Process

Our order process includes a handling or production time in addition to the transit time. Delivery time = handling time + transit time.

Handling Time

All the products undergo a production process, so there will be a handling time of 2–3 business days from Monday to Friday. If your order is placed and payment is received after 2 p.m., then we will process the order the next business day.

Transit Time

Our shipping providers take 3-4 business days to deliver the order. It's an estimate, so there might be a delay.

Shipping Providers

We primarily use UPS or FEDEX for our deliveries. However, we reserve the right to use other carrier services as required to ensure efficient delivery. After an order ships, the shipping carrier will contact customers to coordinate the delivery schedule. 

Once an order has been processed and shipped, it's important to note that the shipping address cannot be altered. Items designated for pickup at the terminal will only be released to the individual listed on the shipping label. A valid driver's license and a signature will be required for the release of the shipment. We adhere strictly to this policy, with no exceptions.

Shipping Rates

We offer free shipping on all orders except for Flat Bed Shipping or Oversized items. Flat Bed Freight Shipping applies to units larger than 7.5 tons. These items will be delivered via flat bed truck and may require additional delivery coordination. Flat rate charges will be shown at checkout for eligible item. Hot Point PTAC items if ordered under 8 Units different freight is charged

Damages and shipping issues

At ACUnitsForLess.com, we are committed to providing our customers with a superior buying experience. We offer free crating to safeguard your equipment during transit, thus eliminating any concerns regarding damage. When you compare our shipping policy to that of our competitors, you'll notice the difference. Customers are not held accountable for any damage to their orders. 

Please make your purchase with confidence, knowing that we will ensure you receive the correct equipment that is brand new and in perfect condition.

How do I handle a return shipment?

You may return your unopened order within 60 days for a refund, minus shipping costs and a 25% restocking fee. Customers will be responsible for return shipping costs. Please keep your original box for shipping.

Cancellation

All orders cancelled after 6 hours from the confirmation email will follow the  return process,  whether or not your order has been shipped. If your order has shipped, you (the buyer) will also be responsible for return shipping charges. Refunds will be issued to the original credit card.

However, if you cancel the order before 6 hours, we will refund your full money.

To process the cancellation, please call us at +1  678-535-7176. We will not be available on Saturday and Sunday, so if somehow you have purchased a product on these days, then contact us on Monday before 3 pm.

If you need any help, feel free to contact us

Address : Unit 1284, 2210 Holly Springs Parkway, Holly Springs, Georgia, 30142, United States
E-Mail: sales@acunitsforless.com
Phone: +1  678-535-7176
Customer Service: Monday to Friday between 9:00 am to 5:00 pm.

Return Policy

If you are not entirely happy with your purchase, you can return your item/s within 60 days of delivery for a full refund of the original payment.

Once we have received the product(s) and, if appropriate, any packaging, a refund will be credited to the payment card account within two weeks; please note that it may take up to 3 days for your bank to credit your account. We are not liable and cannot take responsibility for any bank charges you may incur during the refund process.

Damages and issues

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right. In this case, we will cover the cost of return shipping as well as we will not charge any restocking fee.

Exchanges

The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item. The cost of return shipping is the responsibility of the customer if you want to Exchange. Also we will charge 25% restocking fee.

Return Eligibility

Your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging to be eligible for a return. You’ll also need the receipt or proof of purchase.

Non-returnable items

The following items are not eligible for return:

  • Items that weren't returned within 60 days from the date the customer received the item
  • Items that have been used or damaged by the customer
  • Items that are not in their original packaging
  • Items that do not have all tags and accessories
  • Unfortunately, we cannot accept returns on sale items or gift cards.
  • Items that are consumable and  other wise stated cannot be returned examples are parts, compressors, misc items
  • Special order units
  • Custom-configured products
  • Commercial Units 
  • Consumable parts 
Return Costs

The cost of return shipping is the responsibility of the customer, except in the case of items that were damaged in transit. In that case, we will cover the cost of return shipping.

Restocking Fee

We charge 25% Restocking Fee, except product got damaged by carrier.

To start a return, you can contact us at sales@acunitsforless.com. If your return is accepted, we’ll send you a return shipping label and instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

Cancelled Orders

An order that has shipped cannot be cancelled. If you refuse an order which has already been shipped, not due to damage, you will be responsible for paying an ORDER RETURN FEE. We incur a fee from the freight carrier to return items that have been shipped, this fee is dependent on the item refused and the destination location.

Built-to-Order Items

There are no returns allowed for products which have been specially built for you and shipped by the manufacturer. These items are not routinely stocked at our warehouse and therefore cannot be returned.

Final Sale Policy

 By placing an order, the purchaser expressly acknowledges and agrees to the following terms:

1. No Returns or Exchanges
Final sale items are not eligible for return, exchange, substitution, or store credit for any reason, including but not limited to dissatisfaction, incorrect selection, incompatibility, or change of mind.

2. No Refunds
All sales of final sale items are final and non-refundable. Once an order is placed, it cannot be canceled, modified, or refunded.

3. Assumption of Risk
The purchaser assumes full responsibility for determining product suitability, compatibility, and compliance with applicable codes, regulations, and intended use prior to purchase.

4. Condition and Disclaimer
Final sale items are sold “AS IS” and “WITH ALL FAULTS” with no representations or warranties, express or implied, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, or non-infringement, except where prohibited by law.

5. Shipping and Damage Claims
Any damage occurring during transit must be reported in writing within 48 hours of delivery with supporting photographs. Failure to report within this period constitutes acceptance of the product.

6. Chargebacks and Disputes
The purchaser agrees not to initiate any chargebacks or payment disputes related to final sale items. Any chargeback initiated in violation of this policy may be contested with the payment processor using this agreement as evidence.

7. Severability
If any provision of this policy is deemed unenforceable under applicable law, the remaining provisions shall remain in full force and effect.

If you need any help, feel free to contact us

Address: Unit 1284, 2210 Holly Springs Parkway, Holly Springs, Georgia, 30142, United States
E-Mail: sales@acunitsforless.com
Phone: +1  678-535-7176
Customer Service: Monday to Friday between 9:00 am to 5:00 pm.

Refund Policy

We provide a 60-day return policy for your convenience. To initiate a return, it is essential that the items remain unused and in their original manufacturer's packaging. When returning the equipment, please ensure that you reuse all shipping materials that were initially used to protect the equipment during shipment.

We will provide the return label.

Upon receiving your return, we will issue a refund for the full order amount, minus the return shipping cost and a 25% restocking fee.

Final Sale Policy

 By placing an order, the purchaser expressly acknowledges and agrees to the following terms:

1. No Returns or Exchanges
Final sale items are not eligible for return, exchange, substitution, or store credit for any reason, including but not limited to dissatisfaction, incorrect selection, incompatibility, or change of mind.

2. No Refunds
All sales of final sale items are final and non-refundable. Once an order is placed, it cannot be canceled, modified, or refunded.

3. Assumption of Risk
The purchaser assumes full responsibility for determining product suitability, compatibility, and compliance with applicable codes, regulations, and intended use prior to purchase.

4. Condition and Disclaimer
Final sale items are sold “AS IS” and “WITH ALL FAULTS” with no representations or warranties, express or implied, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, or non-infringement, except where prohibited by law.

5. Shipping and Damage Claims
Any damage occurring during transit must be reported in writing within 48 hours of delivery with supporting photographs. Failure to report within this period constitutes acceptance of the product.

6. Chargebacks and Disputes
The purchaser agrees not to initiate any chargebacks or payment disputes related to final sale items. Any chargeback initiated in violation of this policy may be contested with the payment processor using this agreement as evidence.

7. Severability
If any provision of this policy is deemed unenforceable under applicable law, the remaining provisions shall remain in full force and effect.

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IMPORTANT: HVAC and Water Heater parts and accessories should only be installed by qualified technicians. Failure to understand and follow the manufacturer’s installation and use instructions may result in fire or explosion, electric shock, property damage, injury or loss of life. It is your responsibility to seek professional advice when installing and using these parts and accessories.

Model Number: 71257

Simplify standby-generator installations for homes with split 400 Amp electrical service using the Briggs & Stratton 71257 Dual 200A / Split 400A Symphony® II SED Power Management Automatic Transfer Switch.

Designed specifically for residential electrical systems where a 400 Amp utility service is divided between two 200 Amp distribution panels, the 71257 combines the functionality of two coordinated 200 Amp transfer switches into a single enclosure.

Instead of installing two separate 200 Amp automatic transfer switches, the Briggs & Stratton 71257 provides a more integrated solution for compatible split-400A applications. Its service-entrance-rated design, NEMA 3R enclosure, 120/240V single-phase configuration, UL 1008 listing, and Symphony II power-management capability make it an important component for larger residential standby-power systems.

Key Features

  • Designed for Split 400 Amp Service: Built specifically for homes where 400 Amp utility service is divided between two 200 Amp main distribution panels.
  • Dual 200 Amp Transfer Capability: Incorporates the functionality of two coordinated 200 Amp automatic transfer switches into one enclosure.
  • 2-in-1 Transfer Switch Design: Eliminates the need for two separate 200 Amp transfer-switch enclosures in compatible split-400A applications.
  • Automatic Utility Monitoring: Detects loss of utility power and signals the compatible Briggs & Stratton standby generator to start.
  • Automatic Power Transfer: Transfers the applicable electrical loads to generator power once backup power is available.
  • Automatic Return to Utility: Transfers the electrical system back to utility power when normal service has been restored.
  • Service Entrance Rated: Includes service-entrance disconnect capability for compatible dual-200A residential services.
  • Symphony® II Power Management: Supports power management for controlling and prioritizing electrical loads according to available generator capacity.
  • 120/240V Single Phase: Designed for compatible residential 120/240V, 60 Hz single-phase electrical systems.
  • 2-Pole Configuration: Designed for the specified single-phase split-service application.
  • NEMA 3R Enclosure: Suitable for applicable indoor or outdoor installations requiring a NEMA 3R enclosure.
  • UL 1008 Listed: Listed to UL 1008 requirements for transfer-switch equipment.
  • Smaller Installation Footprint: Combines two transfer functions into one enclosure, helping simplify compatible installations.
  • Designed for Briggs & Stratton Standby Systems: Intended to be bundled with a compatible Briggs & Stratton standby generator.

What Is a Split 400 Amp Electrical Service?

Some larger homes have 400 Amp electrical service to accommodate higher overall electrical demand.

Instead of feeding the entire 400 Amp service through a single distribution panel, a split-400A configuration divides the incoming utility service between two 200 Amp electrical panels.

A simplified configuration looks like this:

400A Utility Service → 200A Main Panel + 200A Main Panel

A conventional standby-generator installation could require a separate 200 Amp transfer switch for each panel.

The Briggs & Stratton 71257 addresses this configuration by incorporating both transfer functions into a single enclosure.

Dual 200A Transfer Switches in One Enclosure

The primary advantage of the Briggs & Stratton 71257 is its 2-in-1 design.

Rather than installing two individual 200 Amp automatic transfer switches, the 71257 combines a coordinated pair of transfer switches into one enclosure.

This can provide several advantages for compatible installations:

  • Fewer separate transfer-switch enclosures
  • More compact equipment arrangement
  • Simplified split-400A standby-system design
  • Coordinated operation across both 200 Amp panels
  • Cleaner installation for larger residential electrical systems

The exact installation configuration should be determined by a qualified electrical professional according to the property's service arrangement.

How the Briggs & Stratton 71257 Works

During normal operation, the home's two 200 Amp distribution panels receive electricity from the utility service.

If utility power is interrupted, the 71257 automatic transfer system detects the outage and signals the compatible Briggs & Stratton standby generator to start.

Once generator power is available, the transfer switch manages the transition of the applicable electrical system from utility power to generator power.

When normal utility service returns, the process is reversed and the electrical loads are transferred back to utility power.

This automatic operation allows a properly configured standby-power system to respond to an outage without requiring the homeowner to manually switch between power sources.

Symphony II Power Management

One of the most important features of the Briggs & Stratton 71257 is its Symphony® II Power Management capability.

A home with 400 Amp electrical service can potentially have far more connected electrical demand than a residential standby generator can supply simultaneously.

Power management helps address this difference.

Instead of attempting to operate every large electrical load at the same time, a properly configured Symphony II system can manage selected loads according to available generator capacity and system priorities.

This can be particularly useful for homes containing equipment such as:

  • Multiple HVAC systems
  • Electric water heaters
  • Well or sump pumps
  • Pool and spa equipment
  • Electric ranges
  • Clothes dryers
  • Additional high-demand household equipment

The actual power-management configuration depends on the generator, connected equipment, and installation requirements.

Important: Split 400A Does Not Mean 400 Amps of Generator Output

The 400 Amp designation describes the home's utility-service configuration and transfer-switch application. It does not mean the standby generator supplies 400 amps of backup power.

Likewise, combining two 200 Amp transfer functions does not increase generator output.

The connected Briggs & Stratton generator remains limited to its rated electrical capacity.

For example, a properly configured standby system may provide generator access across both 200 Amp panels, but the combined electrical demand placed on the generator must remain within available generator capacity.

This is why power management can be particularly important in larger homes with 400 Amp electrical service.

Service Entrance Rated

The Briggs & Stratton 71257 is service-entrance rated with disconnect capability for compatible dual-200A residential electrical-service configurations.

This allows the transfer equipment to perform an important role within the home's service and standby-power architecture while reducing the need for separate transfer-switch equipment in compatible installations.

The actual service-entrance configuration must be determined according to the home's electrical system and applicable electrical codes.

NEMA 3R Indoor/Outdoor Enclosure

The transfer switch is housed in a NEMA 3R enclosure, making it suitable for applicable indoor and outdoor installations.

This provides greater flexibility when determining equipment placement during the design of a standby-generator system.

Final placement should comply with Briggs & Stratton installation requirements and applicable electrical and building codes.

Specifications

Specification Details
Brand Briggs & Stratton
Model Number 71257
Product Type Automatic Power Management Transfer Switch
Application Split 400 Amp Residential Service
Transfer Configuration Dual 200 Amp
Service Entrance Rated Yes
Poles 2
Frequency 60 Hz
Phase Single Phase
Voltage 120/240V
Power Management Symphony II
Enclosure NEMA 3R
Indoor / Outdoor Yes
Certification UL 1008
Generator Compatibility Compatible Briggs & Stratton Standby Generator Systems

Who Should Consider the Briggs & Stratton 71257?

The 71257 is specifically intended for compatible homes with split 400 Amp electrical service.

It may be appropriate when the property has:

  • 400 Amp residential electrical service
  • Two 200 Amp main distribution panels
  • A compatible Briggs & Stratton standby generator
  • Large electrical loads distributed between both panels
  • A need for automatic standby-power transfer
  • A need for Symphony II load management

For a conventional home with a single 200 Amp electrical service, a standard 200 Amp transfer switch may be more appropriate.

Frequently Asked Questions

What is the Briggs & Stratton 71257?

The Briggs & Stratton 71257 is a Dual 200 Amp / Split 400 Amp automatic transfer switch with service-entrance disconnect and Symphony II power management.

It is designed for compatible homes where a 400 Amp utility service is divided between two 200 Amp electrical panels.

Why use one 71257 instead of two 200 Amp transfer switches?

The 71257 combines the functionality of two coordinated 200 Amp transfer switches into a single enclosure.

For compatible split-400A installations, this can reduce the number of separate transfer-switch enclosures and provide a more integrated standby-power configuration.

Does the 71257 provide 400 amps of generator power?

No.

The 400 Amp designation refers to the electrical-service configuration the transfer switch is designed to accommodate.

Actual backup-power capacity is determined by the connected standby generator.

Can it provide generator power to both 200 Amp panels?

The 71257 is designed for split-400A applications involving two 200 Amp distribution panels.

The amount of equipment that can operate simultaneously remains limited by the connected generator's available capacity and the system's power-management configuration.

Does the 71257 include power management?

Yes. The supplied product information identifies the 71257 as a Symphony II SED Power Management Transfer Switch.

Power management can help coordinate selected electrical loads so the standby generator is not required to operate every high-demand load simultaneously.

Is the Briggs & Stratton 71257 service entrance rated?

Yes. The supplied specifications identify the 71257 as service-entrance rated with disconnect capability for dual 200 Amp home services.

Can the transfer switch be installed outdoors?

The 71257 uses a NEMA 3R enclosure designed for applicable indoor and outdoor installations.

What generator works with the Briggs & Stratton 71257?

The supplied product information states that the transfer switch must be bundled with a Briggs & Stratton standby generator.

The specific generator and transfer-switch combination should be verified for compatibility before installation.

Shop Briggs & Stratton Transfer Switches at AC Units For Less

For homes with split 400 Amp electrical service, the Briggs & Stratton 71257 Dual 200A / Split 400A Symphony II SED Power Management Transfer Switch provides a streamlined alternative to installing two separate 200 Amp transfer-switch enclosures.

Its combination of dual 200 Amp transfer capability, service-entrance disconnects, Symphony II power management, 120/240V single-phase operation, NEMA 3R construction, and UL 1008 listing makes it an important component for compatible high-capacity residential standby-power systems.

Shop Briggs & Stratton standby generators, automatic transfer switches, power-management equipment, and generator accessories at AC Units For Less.

Important: The 71257 does not provide 400 amps of generator output. Generator capacity, service configuration, transfer-switch compatibility, load management, and installation requirements should be evaluated by a qualified electrical professional according to Briggs & Stratton instructions and applicable electrical codes.

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PRODUCT INFORMATION DISCLAIMERS

Safety Liability Notice

We are not liable for any injuries, damages, or losses resulting from improper service or installation of our products. While we strive to provide reliable and high-quality HVAC products, any issues arising from improper handling, installation, or maintenance are the sole responsibility of the installer or service provider. Customers are encouraged to engage qualified professionals for installation and servicing to ensure safety and optimal performance. By purchasing and using our products, customers agree to hold The Acunitsforless Company harmless from any liability related to improper service or installation. It is essential to follow all manufacturer guidelines, industry standards, and local building codes to mitigate risks and ensure safe operation.

Installation Disclaimer

Please note that all installations should be performed by a licensed and experienced HVAC professional. Improper installation may result in equipment malfunction, reduced performance, increased energy consumption, and potential safety hazards.

Furthermore, it is essential to understand that any installation not conducted by a qualified HVAC professional may result in the voiding of warranty coverage. Manufacturers typically require installations to be carried out by certified technicians to uphold warranty terms and conditions.

By choosing to have your HVAC systems installed by a qualified professional, you not only protect your investment but also ensure the optimal performance and safety of your heating, ventilation, and air conditioning systems while maintaining warranty coverage.

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