SP240V400KA Extreme Duty Whole House Surge Protector with EMP Protection – 120/240V Split Phase – 400kA – Type 1 SPD
$499.00
The SP240V400KA is an extreme-duty Type 1 whole-house surge protector for compatible 120/240V split-phase electrical systems. It is designed for demanding residential, commercial, agricultural, off-grid, and critical equipment applications where high-capacity surge protection is needed against lightning-related surges, utility switching, load switching, and EMP-related surge events.
Key Features
- Extreme-duty whole-house surge protection for compatible 120/240V split-phase panels
- 400kA surge current capacity
- Type 1 SPD for service entrance or panel applications
- Helps protect against EMP-related surge events, CME-related disturbances, solar flare-related transients, lightning-related surges, and utility switching transients
- 6-mode protection: L1-L2, L1-N, L2-N, L1-G, L2-G, N-G
- NEMA 4X / IP67 enclosure for indoor or outdoor installation
- 36 inch 10 AWG leads for flexible mounting and clean wire routing
- Dual-status LED indicators: Green = protected / normal operation, Red = replace unit
SP240V400KA Extreme-Duty Whole House Surge Protector with EMP Surge Protection
The Bad Wolf SP240V400KA 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, off-grid, and critical equipment applications where high-capacity surge protection is needed.
With a 400kA surge current capacity, 6-mode protection, and a rugged NEMA 4X / IP67 enclosure, the SP240V400KA provides the highest surge current capacity in this Bad Wolf split-phase product series.
Extreme-Duty Whole-House Panel Protection
The SP240V400KA 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, and other critical electrical loads.
- Type 1 SPD for service entrance or panel applications
- Compatible with 120/240V split-phase systems
- 400kA surge current capacity
- 6-mode protection: L1-L2, L1-N, L2-N, L1-G, L2-G, N-G
- 100kA SCCR for high fault-current environments when properly applied
- 36 inch 10 AWG leads for flexible mounting and clean wire routing
- NEMA 4X / IP67 enclosure for indoor or outdoor installation
Designed for EMP-Related Surge Events
The SP240V400KA is designed to help protect against damaging transient surge events, including lightning-related surges, utility switching transients, load switching transients, and surge events associated with EMP, CME, and solar flare-related disturbances.
Compared to lower-capacity models, the SP240V400KA provides a higher surge current capacity for applications where added 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 from every surge event or every electromagnetic disturbance. Proper installation, grounding, bonding, and system design are critical for best performance.
Built for Critical and Demanding Applications
The SP240V400KA is well suited for applications where maximum available surge current capacity is desired in a 120/240V split-phase Bad Wolf SPD. Its pre-wired design allows the unit to be mounted near the electrical panel or service equipment while keeping conductor runs short and organized.
Common applications include residential service panels, commercial electrical panels, agricultural systems, backup power 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 includes green and red LED status indicators for quick visual confirmation of protection status.
- Green LED ON: Protected / normal operation
- Red LED ON: Replace unit
Installation Overview
Professional installation is recommended. The SP240V400KA should be installed by a qualified electrical professional in accordance with the product instructions, product label, applicable electrical codes, and local requirements.
For best performance, install the surge protector as close to the point of connection as practical and keep all conductors as short and straight as possible.
- Black / Red: L1 / L2 split-phase conductors
- 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 warranty
Refer to the Specifications and Installation tabs for complete product ratings, wiring information, and installation requirements.
Product Details
| Weight | 21 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 | Liquid-Tight Fitting, 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 | 21 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, applicable electrical codes, and local requirements.
Always disconnect power before installation and verify that the SP240V400KA is suitable for the electrical system where it will be installed.
Panel Installation Notes
- Install the surge protector at the main service panel, subpanel, disconnect, or other approved electrical equipment location.
- This model includes a 1/2" straight liquid-tight connector for flexible non-metallic liquid-tight tubing. Liquid-tight tubing, conduit, and any additional fittings or connectors required for the installation are supplied by the installer or customer.
- Mount the surge protector securely and make sure the liquid-tight connector is properly installed and tightened for the enclosure and installation location.
- Connect the conductors according to the product wiring diagram and applicable electrical code requirements.
- Use an appropriately rated breaker, disconnect, or connection method as required by the product instructions and local code.
- Keep all conductors as short and straight as possible between the surge protector and the point of connection.
- Do not sharply bend, coil, or unnecessarily extend the wires.
- Use proper fittings, strain relief, and enclosure practices for the installation location.
Status Indicator
After installation, restore power and verify the status lights.
- Green light on: The surge protector is functioning properly and the electrical system is protected.
- Red light on: The surge protector is damaged and must be replaced.
- No lights on: No power is being applied to the surge protector. The electrical connections and electrical service should be inspected before placing the system back into service.
Refer to the product label and installation instructions for the correct wiring configuration, breaker or connection requirements, status light behavior, and 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.
- 1/2 in NPT Liquid Tight Connector 90 Degree Black — $4.00
- 1/2 in NPT Liquid Tight Connector Black — $2.00
- 1/2 in NPT Liquid Tight Connector Gray — $2.00
- 1/2 inch Non-Metallic Liquid Tight Conduit — $1.75
- Flush Mount Plate FMP-63 — $40.00
FAQ
What is the SP240V400KA mainly used for?
The SP240V400KA is commonly used as a premium high-capacity whole-house surge protector for residential, light commercial, garage, workshop, and small business 120/240V split-phase electrical systems.
Where is the SP240V400KA installed?
The SP240V400KA is typically installed at the main electrical panel, service equipment, or another compatible panel location to help protect connected equipment throughout the electrical system from damaging power surges.
What type of electrical system is this surge protector designed for?
The SP240V400KA is designed for 120/240V split-phase electrical systems commonly used in homes, garages, workshops, small businesses, and light commercial applications.
Can the SP240V400KA be used as a whole-house surge protector?
Yes. The SP240V400KA is designed for whole-house surge protection applications when properly installed on a compatible 120/240V split-phase electrical system.
How is the SP240V400KA different from the SP240V225KA?
The SP240V400KA has a higher surge current rating than the SP240V225KA, making it a stronger option for customers who want a higher-capacity whole-house surge protector with protection for normal surge events, indirect lightning effects, and electromagnetic disturbance surge events.
Does the SP240V400KA protect against lightning?
The SP240V400KA is designed to help protect against surge events caused by indirect lightning activity. No surge protector can guarantee protection from a direct lightning strike, but a properly installed surge protective device can help reduce the risk of damage from surge energy entering the electrical system.
Does the SP240V400KA provide EMP, CME, or solar flare protection?
Yes. The SP240V400KA is designed to help protect against damaging surge activity associated with electromagnetic disturbance events, including EMP, CME, and solar flare related electrical disturbances. Proper installation, grounding, and bonding are important for effective protection.
Should I choose the SP240V400KA or a smaller Bad Wolf model?
The SP240V400KA is a good choice for customers who want one of Bad Wolf’s highest-capacity whole-house surge protection options for a 120/240V split-phase system. Customers looking for a lower-cost option may consider the SP240V100KA, SP240V200KA, or SP240V225KA depending on the application and desired protection level.
What does the 400KA rating mean?
The 400KA rating refers to the surge current capacity of the device. It is designed to help protect connected electrical equipment from damaging surge events when properly installed on a compatible system.
Is this a Type 1 surge protective device?
Yes. The SP240V400KA is a Type 1 surge protective device, which allows it to be installed on the line side or load side of the service disconnect when installed in accordance with the product instructions and applicable electrical codes.
Does this surge protector need to be installed with a circuit breaker?
This surge protector is a Type 1 surge protective device and does not have to be installed in conjunction with a circuit breaker when installed as a Type 1 SPD in accordance with the product instructions and applicable electrical codes.
If this surge protector is installed as a Type 2 SPD on the load side of the service disconnect, Bad Wolf recommends using a 20 amp double-pole circuit breaker unless otherwise required by the authority having jurisdiction, local code, or the specific installation conditions.
What do the LED indicator lights mean?
The SP240V400KA includes green and red LED indicator lights. Green means the surge protector is functioning correctly. Red means the surge protector needs to be replaced.
Can this surge protector be installed outdoors?
Yes. The SP240V400KA uses a durable enclosure suitable for indoor or outdoor installation when installed according to the product instructions and applicable electrical codes.
Is the flush mount plate required?
No. The flush mount plate is optional. It provides a cleaner finished look when mounting the SP240V400KA on drywall or another flat surface.
Who should install this product?
This product should be installed by a qualified electrician, licensed contractor, or qualified installer familiar with electrical panels, service equipment, grounding, bonding, and surge protective devices.
Does this product include a 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.
Specifications
SP240V400KA Specifications
| Model Number | SP240V400KA |
|---|---|
| Product Type | Extreme-duty whole-house surge protection 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 |
| Maximum Continuous Operating Voltage (MCOV) | 150 VAC L-N / L-G; 300 VAC 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, N-G |
| Surge Events Protected Against | Lightning-related surges, utility switching transients, load switching transients, motor-generated surges, EMP-related surge events, CME-related disturbances, and solar flare-related transients |
| Connection Type | Hardwire, pre-wired leads |
| Wiring | 36 inches of 10 AWG leads |
| Typical Wire Connections | Black / Red = L1 / L2, White = Neutral, Green = Equipment Ground |
| Mounting / Connection Style | 1/2 inch straight liquid-tight conduit connector style connection |
| Enclosure Rating | NEMA 4X / IP67 |
| Housing Flammability Rating | V-0 |
| Installation Environment | Indoor or outdoor |
| Status Indicators | Green and red LED indicators |
| LED Status | Green ON = Protected / normal operation; Red ON = Replace unit |
| Product Dimensions | 7.5 × 3.25 × 2.25 in |
| Product Weight | 21 oz |
| 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 |
| Warranty | 5 years |