SP240V400KA-A Extreme Duty Whole House Surge Protector with EMP Protection – 120/240V Split Phase – 400kA – Panel Mount – Type 1 SPD
$499.00
The SP240V400KA-A is an extreme-duty Type 1 whole-house surge protector designed for compatible 120/240V split-phase electrical systems. Its built-in 1/2-inch NPT male fitting mounts directly through a standard 1/2-inch knockout in an electrical panel, disconnect, service enclosure, or equipment enclosure.
It is designed for demanding residential, commercial, agricultural, backup-power, off-grid, and critical-equipment applications where high-capacity protection is desired against lightning-related surges, utility switching, load switching, motor-generated transients, and EMP-related surge events.
Key Features:
- 400kA surge-current capacity
- Type 1 SPD for compatible service-entrance and electrical-panel applications
- Built-in 1/2-inch NPT male fitting for direct panel mounting
- Compatible with 120/240V split-phase electrical systems
- Four-wire L1/L2/N/G connection
- Six-mode protection: L1-L2, L1-N, L2-N, L1-G, L2-G, and N-G
- Helps protect against EMP-, CME-, solar-flare-, lightning-, and utility-switching-related surge events
- NEMA 4X/IP67 enclosure for properly installed indoor or outdoor applications
- 36-inch 10 AWG connection leads
- Green and red status indicators for quick visual monitoring
- ETL Listed to UL 1449 5th Edition
- Made in the USA by Bad Wolf
SP240V400KA-A Extreme-Duty Whole-House Surge Protector with EMP-Related Surge Protection
The Bad Wolf SP240V400KA-A is an extreme-duty Type 1 whole-house surge protector designed for compatible 120/240V split-phase electrical systems. It is built for demanding residential, commercial, agricultural, backup-power, off-grid, and critical-equipment applications where high-capacity surge protection is desired.
With a 400kA surge-current capacity, six-mode protection, and a rugged NEMA 4X / IP67 enclosure, the SP240V400KA-A provides the highest surge-current capacity in the current Bad Wolf split-phase surge protector series.
Its built-in 1/2-inch NPT male fitting allows the unit to mount directly through a standard 1/2-inch knockout in a compatible electrical panel, disconnect, service enclosure, or equipment enclosure.
Extreme-Duty Whole-House Panel Protection
The SP240V400KA-A is intended for installation at a main electrical panel, subpanel, disconnect, service equipment, or other approved electrical-equipment location. It helps reduce the risk of surge-related damage to connected equipment such as HVAC systems, appliances, electronics, controls, backup-power equipment, pumps, smart-home devices, communication equipment, and other critical electrical loads.
- Type 1 SPD for compatible service-entrance and electrical-panel applications
- Compatible with 120/240V split-phase systems
- 400kA surge-current capacity
- Six-mode protection: L1-L2, L1-N, L2-N, L1-G, L2-G, and N-G
- 100kA SCCR for high fault-current environments when properly applied
- 36-inch 10 AWG leads for short, organized conductor routing
- Built-in 1/2-inch NPT male fitting for direct panel mounting
- NEMA 4X / IP67 enclosure for properly installed indoor or outdoor applications
Designed for EMP-Related Surge Events
The SP240V400KA-A is designed to help protect against damaging transient surge events, including lightning-related surges, utility-switching transients, load-switching transients, motor-generated surges, and surge activity associated with EMP, CME, and solar-flare-related disturbances.
Compared with lower-capacity models, the SP240V400KA-A provides additional surge-current capacity for applications where greater protection margin is desired. It is intended to provide extreme-duty panel-level surge protection as part of a broader electrical-protection strategy.
No surge protection device can guarantee protection against every surge event, direct lightning strike, or electromagnetic disturbance. Proper installation, grounding, bonding, conductor routing, and overall system design are critical for best performance.
Built for Critical and Demanding Applications
The SP240V400KA-A is well suited for applications where the highest available surge-current capacity is desired in a Bad Wolf 120/240V split-phase SPD. Its direct-panel-mount design allows the unit to install through a compatible 1/2-inch panel or enclosure knockout while helping keep conductor runs short and organized.
Common applications include residential service panels, commercial electrical panels, agricultural systems, backup-power systems, generator-supported systems, off-grid power systems, solar-related AC electrical applications, pump systems, communication-equipment locations, and other critical electrical systems when properly applied.
Status Indicators
The SP240V400KA-A includes green and red LED status indicators for quick visual confirmation of protection status.
- Green LED ON: Protected / normal operation
- Red LED ON: Protection has been compromised; replace the unit
Installation Overview
Professional installation is recommended. The SP240V400KA-A should be installed by a qualified electrical professional in accordance with the product instructions, product label, applicable electrical codes, and local requirements.
The built-in 1/2-inch NPT male fitting mounts directly through a standard 1/2-inch knockout in a compatible electrical panel, disconnect, service enclosure, or equipment enclosure.
For best surge-protection performance, install the device as close to the electrical connection point as practical and keep all conductors as short, straight, and free of unnecessary bends as possible.
- Red and Black: Line 1 and Line 2
- White: Neutral
- Green: Equipment Ground
Listings, Testing & Compliance
- ETL Listed to UL 1449 5th Edition
- Certified to CSA C22.2 No. 269.1 and 269.2
- FCC 47 CFR Part 15 tested
- ICES-003 tested
- Suitable for circuits not exceeding 100kA RMS symmetrical amps
- 5-year limited manufacturer warranty
Refer to the Specifications and Installation tabs for complete product ratings, wiring information, mounting requirements, and installation instructions.
Product Details
| Weight | 34 oz |
|---|---|
| Dimensions | 7.5 × 3.25 × 2.25 in |
| Operating Voltage (Vac) | 120/240V |
| Electrical System | 120/240V Split Phase |
| Current Type | AC |
| SPD Type | Type 1, Type 2 |
| Recommended Applications | Agricultural, Backup Power, Commercial, Critical Equipment, Electrical Panel, Home, Off-Grid, Residential Panel, Service Entrance, Solar, Whole House |
| Installation / Connection Type | Panel Mount, Pre-wired Leads, Hardwire |
| Surge Current Capacity | 400kA |
| Surge Events Protected Against | CME-related disturbances, EMP-related surge events, Lightning-related surges, load switching transients, motor-generated surges, solar flare-related transients, utility switching transients |
| Enclosure Rating | Indoor, IP67, NEMA 4X, Outdoor |
| Product Dimensions | 7.5 × 3.25 × 2.25 in |
| Product Weight | 34 oz |
Installation
Professional installation is recommended. Installation should be performed by a qualified electrician, licensed contractor, or qualified installer in accordance with the product instructions, product label, applicable electrical codes, and local requirements.
Always disconnect power before installation and verify that the SP240V400KA-A is suitable for the electrical system and installation location.
Direct Panel-Mount Installation
- Install the surge protector at the main service panel, subpanel, disconnect, service equipment, or other approved electrical-equipment location.
- The SP240V400KA-A includes a built-in 1/2-inch NPT male fitting designed to mount directly through a standard 1/2-inch knockout in a compatible electrical panel, disconnect, service enclosure, or equipment enclosure.
- This model does not require a separate liquid-tight connector for its standard direct-panel-mount installation.
- Any additional fittings, sealing components, locknuts, bushings, or installation hardware required for the specific enclosure and installation location are supplied by the installer or customer.
- Secure the surge protector and fitting properly so the unit is firmly mounted and the installation maintains the required enclosure protection.
- Connect the conductors according to the product wiring diagram, product label, installation instructions, and applicable electrical-code requirements.
- Use an appropriately rated breaker, disconnect, or approved connection method when required by the product instructions, installation configuration, and applicable electrical code.
- Install the surge protector as close to the electrical connection point as practical.
- Keep all conductors as short, straight, and free of unnecessary bends as possible.
- Do not sharply bend, coil, splice, or unnecessarily extend the conductors.
- Use proper grounding, bonding, sealing, strain-relief, and enclosure practices for the installation location.
Conductor Identification
- Red and Black: Line 1 and Line 2
- White: Neutral
- Green: Equipment Ground
Status Indicators
After installation is complete, restore power and verify the status lights.
- Green light on: The surge protector is powered and operating normally.
- Red light on: Surge protection has been compromised and the unit should be replaced.
- No lights on: Power may not be reaching the surge protector, or the device or electrical connections may require inspection. Have the installation checked before returning the system to normal service.
Refer to the product label and complete installation instructions for the correct wiring configuration, breaker or connection requirements, mounting requirements, status-light behavior, and other product-specific installation details.
Warranty
Bad Wolf surge protection devices include a 5-year product warranty.
Eligible products may also include connected equipment warranty coverage when properly installed and registered according to the warranty terms.
Please review the full warranty terms for complete details, limitations, registration requirements, and coverage information.
Accessories
Recommended accessories and related products for this item.
- Flush Mount Plate FMP-63 — $40.00
FAQ
What is the SP240V400KA-A mainly used for?
The SP240V400KA-A is an extreme-duty whole-house surge protector designed for compatible residential, commercial, agricultural, workshop, backup-power, off-grid, and critical-equipment 120/240V split-phase electrical systems.
Where is the SP240V400KA-A installed?
The SP240V400KA-A is typically installed at a main electrical panel, service equipment, subpanel, disconnect, or another compatible electrical-equipment location. Its built-in 1/2-inch NPT male fitting mounts directly through a standard 1/2-inch panel or enclosure knockout.
What type of electrical system is this surge protector designed for?
The SP240V400KA-A is designed for compatible 120/240V split-phase electrical systems commonly used in homes, garages, workshops, farms, small businesses, backup-power installations, off-grid systems, and light-commercial applications.
Can the SP240V400KA-A be used as a whole-house surge protector?
Yes. The SP240V400KA-A is designed for whole-house surge-protection applications when properly installed on a compatible 120/240V split-phase electrical system.
How does the SP240V400KA-A mount?
The SP240V400KA-A includes a built-in 1/2-inch NPT male fitting designed for direct mounting through a standard 1/2-inch knockout in a compatible electrical panel, disconnect, service enclosure, or equipment enclosure.
How is the SP240V400KA-A different from the SP240V400KA?
The SP240V400KA-A and SP240V400KA provide the same primary electrical surge-protection ratings but use different mounting methods.
- SP240V400KA-A: Built-in 1/2-inch NPT male fitting for direct panel or enclosure mounting
- SP240V400KA: Designed for connection using a 1/2-inch liquid-tight conduit connection
How is the SP240V400KA-A different from the SP240V225KA-A?
The SP240V400KA-A has a higher surge-current capacity than the SP240V225KA-A. Both models are designed to help protect against normal surge events, indirect-lightning-related surges, and surge activity associated with electromagnetic disturbances such as EMP, CME, and solar-flare-related events.
The SP240V400KA-A provides additional surge-current capacity for applications where greater protection margin is desired.
Does the SP240V400KA-A protect against lightning?
The SP240V400KA-A is designed to help protect against surge events caused by indirect lightning activity and surge energy entering the electrical system.
No surge protector can guarantee protection against every lightning event or a direct lightning strike. Proper installation, grounding, bonding, conductor routing, and overall system design are important for effective protection.
Does the SP240V400KA-A provide EMP, CME, or solar-flare protection?
The SP240V400KA-A is designed to help reduce the risk of equipment damage from surge activity associated with electromagnetic disturbances, including EMP-, CME-, and solar-flare-related electrical events.
Protection effectiveness depends on the characteristics of the event, electrical-system design, installation, grounding, bonding, conductor routing, and other factors. No surge protector can guarantee protection against every electromagnetic disturbance.
Should I choose the SP240V400KA-A or a smaller Bad Wolf model?
The SP240V400KA-A is a strong choice for customers who want the highest surge-current capacity currently available in the Bad Wolf 120/240V split-phase product series.
Customers who do not require the same surge-current capacity may consider the SP240V100KA-A, SP240V200KA-A, or SP240V225KA-A depending on the application, budget, mounting requirements, and desired protection level.
What does the 400kA rating mean?
The 400kA rating refers to the surge-current capacity of the device. It indicates the amount of short-duration surge current the surge protective device is designed to manage under its specified test conditions.
This rating is not the normal operating current of the electrical system or the continuous current carried by the surge protector.
What protection modes does the SP240V400KA-A provide?
The SP240V400KA-A provides six-mode surge protection across the following conductor combinations:
- L1-L2
- L1-N
- L2-N
- L1-G
- L2-G
- N-G
Is the SP240V400KA-A a Type 1 surge protective device?
Yes. The SP240V400KA-A is a Type 1 surge protective device. Type 1 SPDs may be installed in approved line-side or load-side applications when installed according to the product instructions, product listing, applicable electrical codes, and requirements of the authority having jurisdiction.
Does this surge protector need to be installed with a circuit breaker?
When installed in an approved Type 1 configuration, the SP240V400KA-A may not require connection through a branch circuit breaker. The correct connection method depends on the installation location, product instructions, electrical-system configuration, applicable code, and requirements of the authority having jurisdiction.
When connected on the load side through a circuit breaker, Bad Wolf generally recommends a properly rated 20-amp double-pole circuit breaker unless a different requirement applies to the specific installation.
What do the LED indicator lights mean?
The SP240V400KA-A includes green and red LED status indicators.
- Green light on: The surge protector is powered and operating normally.
- Red light on: Surge protection has been compromised and the unit should be replaced.
- No lights on: Power may not be reaching the surge protector, or the device or electrical connections may require inspection.
Can the SP240V400KA-A be installed outdoors?
Yes. The SP240V400KA-A uses a NEMA 4X/IP67 enclosure suitable for properly installed indoor or outdoor applications. The installation must maintain the required enclosure protection and comply with the product instructions and applicable electrical codes.
Is a flush-mount plate required?
No. The SP240V400KA-A already includes a built-in 1/2-inch NPT male fitting for direct installation through a compatible electrical-panel or enclosure knockout. A separate flush-mount plate is not required for the standard direct-panel-mount installation.
Who should install the SP240V400KA-A?
The SP240V400KA-A should be installed by a qualified electrician, licensed contractor, or qualified installer familiar with electrical panels, service equipment, grounding, bonding, conductor routing, and surge protective devices.
Does the SP240V400KA-A include a warranty?
The SP240V400KA-A includes a 5-year limited manufacturer warranty. Eligible installations may also qualify for connected-equipment warranty coverage when the product is properly installed and registered according to the applicable warranty terms.
Refer to the current Bad Wolf warranty documentation for complete eligibility requirements, registration deadlines, exclusions, and coverage terms.
Specifications
SP240V400KA-A Specifications
| Model Number | SP240V400KA-A |
|---|---|
| Product Type | Extreme-duty whole-house surge protective device with EMP-related surge protection |
| SPD Type | Type 1 |
| Electrical System | 120/240V split-phase |
| Frequency | 50/60 Hz |
| Current Type | AC |
| Surge-Current Capacity | 400kA |
| Nominal Discharge Current (In) | 10kA |
| Short-Circuit Current Rating (SCCR) | 100kA RMS symmetrical amperes |
| Maximum Continuous Operating Voltage (MCOV) | 150VAC L-N / L-G; 300VAC L-L |
| Voltage Protection Rating (VPR) | 500V L-N / L-G; 1000V L-L |
| Protection Modes | L1-L2, L1-N, L2-N, L1-G, L2-G, and N-G |
| Designed to Help Protect Against | Lightning-related surges, utility-switching transients, load-switching transients, motor-generated surges, and surge activity associated with EMP, CME, and solar-flare-related electrical disturbances |
| Connection Type | Hardwired, pre-wired direct-panel-mount connection |
| Mounting Type | Built-in 1/2-inch NPT male fitting for direct installation through a standard 1/2-inch electrical-panel or enclosure knockout |
| Wiring | 36-inch 10 AWG pre-wired leads |
| Conductor Connections | Red and Black = Line 1 and Line 2; White = Neutral; Green = Equipment Ground |
| Load-Side Breaker Installation Note | When connected on the load side through a circuit breaker, Bad Wolf generally recommends a properly rated 20A double-pole breaker unless otherwise required by the product instructions, applicable electrical code, installation conditions, or authority having jurisdiction. Breaker not included. |
| Enclosure Rating | NEMA 4X / IP67 |
| Housing Flammability Rating | V-0 |
| Installation Environment | Indoor or outdoor when properly installed |
| Status Indicators | Green and red LED indicators |
| LED Status | Green ON = Protected / normal operation; Red ON = Protection compromised / replace unit |
| Product Dimensions | 7.5 × 3.25 × 2.25 inches |
| Product Weight | 34 ounces |
| Listings | ETL Listed to UL 1449 5th Edition; certified to CSA C22.2 No. 269.1 and 269.2 |
| EMC Testing | FCC 47 CFR Part 15 tested; ICES-003 tested |
| Country of Manufacture | United States |
| Warranty | 5-year limited manufacturer warranty |
No surge protective device can guarantee protection against every surge event, direct lightning strike, or electromagnetic disturbance. Proper installation, grounding, bonding, conductor routing, and overall system design are important for effective protection.