A suitable 240V inline GFCI must match the equipment’s voltage, current, connector, grounding arrangement and required protection type. A familiar TEST/RESET button or a product title containing “240V” is not enough. Have a licensed electrician or the equipment manufacturer confirm the application before buying.
For a compatible cord-connected load, a factory-complete cord set is easier to specify than a bare-lead component. For a fixed appliance or a circuit that needs protection at its source, an appropriate GFCI breaker may be the correct solution. These are different products with different installation requirements.
Two documented 240V inline configurations
| Manufacturer and model | Documented configuration | Important limitation |
|---|---|---|
| Southwire Shockshield 44800013-2 | 240V, 30A, 6-foot cord, NEMA L6-30 plug and receptacle, manual reset | Only for equipment and supply matching that complete configuration |
| Woodhead Super-Safeway 24052-1M | 240V, 20A, 2-foot cord, NEMA L6-20 plug and connector, manual reset | A different connector and current rating from the Southwire option |
These are specification examples to discuss with the manufacturer or electrical supplier. They are not interchangeable, and neither is a universal adapter for a dryer, spa, welder, brewery, EV charger or other 240V appliance.
Southwire Shockshield 44800013-2
Southwire’s exact model page identifies a 30A, 240V inline assembly with L6-30 ends and a six-foot cord. It specifies manual reset and a 4–6 mA ground-fault trip point. The manufacturer UPC is 032886303807, useful when checking a distributor’s item.
This is a candidate when the approved application calls for a 30A L6-30 inline cord set. Check the full installation instructions, assembly certification and environmental suitability with the supplier before ordering. Do not substitute a similarly named 120V Shockshield product.
Woodhead Super-Safeway 24052-1M
The Woodhead manufacturer brochure lists 24052-1M as a 20A, 240V manual-reset unit with NEMA L6-20 plug and connector and a two-foot cord. The corresponding Molex ordering number is 130153-0156.
Pay attention to the suffix: 24052-1A is the automatic-reset version, while 24052-0M is a flying-lead component. A search result for the broader 24052 family does not establish that the selected item is the complete manual-reset cord set. Confirm the complete part number on the quotation and supplied product.
Why flying leads need special care
The 24052-0M sometimes appears in online lists with an incompatible “NEMA 5-20” description. The manufacturer’s 24052-0M datasheet identifies flying leads, no receptacles and no NEMA connector configuration. It is not ready to plug into an outlet.
A component with exposed wire ends must not be treated as a consumer extension cord. Specifying and incorporating it requires the correct enclosure, terminations, strain relief, conductor arrangement and end-product approval. Do not splice one into an appliance cord using an online shopping description as wiring instructions.
A certification or environmental rating for the GFCI body also does not automatically apply to a finished assembly built around it. The complete product and its intended use need to be checked, not just the black box in the photograph.
GFCI, equipment protection and LCDI are different
UL’s explanation of protective devices distinguishes Class A GFCIs, which operate in the 4–6 mA range for personnel protection, from ground-fault protection intended for equipment. A device described as 30 mA equipment protection should not be substituted where Class A GFCI protection is required.
An LCDI cord, commonly associated with air conditioners, has a different purpose and construction. A surge protector, ordinary circuit breaker or power-monitoring adapter is another distinct product. Similar buttons and similar marketing language do not make these devices equivalent.
A GFCI reduces the risk from ground-fault current; it does not make contact with electricity safe. Keep the correct circuit overcurrent protection, grounding and installation practices. The CPSC’s home-wiring guide describes breaker-type and plug-in GFCIs separately, including the additional overcurrent function of a GFCI circuit breaker.
A checklist to use before ordering
- Record the equipment nameplate. Get its model, supply voltage, current requirements and manufacturer instructions. Do not estimate the required current from a vague product category.
- Identify the actual connection. Have the plug and receptacle designation confirmed. L6-20 and L6-30 are not the same, and a 120/240V appliance with a neutral requirement needs a different evaluation from a 240V-only load.
- Confirm protection type. Ask for the required GFCI class and certification of the finished product. A generic leakage-current label is insufficient.
- Check the whole assembly rating. Include cord, connectors, enclosure, indoor/outdoor use, moisture exposure and any installation limitations.
- Check reset behavior. Verify whether power stays off after supply interruption or can return automatically.
- Get application confirmation. Give the supplier the exact equipment and circuit details, and retain its written specification with the manual.
Leviton’s L6-30 connector specifications, for example, identify a 250V, two-pole, three-wire grounding configuration. That illustrates why matching connector designations matters: the rating describes a specific electrical arrangement, not merely a plug shape that can be adapted to anything.
Manual reset versus automatic reset
A manual-reset unit can require deliberate restoration after a supply interruption, while an automatic-reset design can restore output when supply power returns. The appropriate behavior depends on the equipment and its own controls. A machine unexpectedly restarting can be dangerous.
For a tool or machine, ask its manufacturer which arrangement is acceptable. Do not select automatic reset simply to avoid walking over to a tripped device. Reset behavior after a power outage and resetting after an actual ground fault should both be understood from the exact manual.
When an inline unit is the wrong purchase
Stop shopping for an adapter if the application requires a panel-mounted protective device, a dedicated circuit, a different receptacle or changes to fixed wiring. A qualified electrician should assess those changes, including panel compatibility and the requirements adopted in your area.
Special equipment can have additional requirements. In particular, follow the equipment maker’s instructions for spas, pools, EV charging and appliances with electronic drives. Do not assume that an inline device approved for one workshop tool is suitable for an unrelated load.
What to do if it trips or will not reset
Stop using the equipment and follow the manufacturer’s test and troubleshooting instructions. A damaged cord, moisture, faulty equipment or an incompatible application needs investigation. Repeatedly resetting, defeating the protective device, removing the grounding connection or choosing a higher leakage threshold is not an acceptable fix.
Inspect the assembly before use and perform its prescribed TEST/RESET check. If it is damaged, fails its test or trips repeatedly, keep it out of service until a qualified person has resolved the cause.
The practical buying decision
Start with the equipment and circuit, then select an exact approved assembly. The Southwire 44800013-2 and Woodhead 24052-1M demonstrate two real 240V inline formats, but the right choice is the one a qualified professional verifies for your application. If those specifications do not match, neither belongs in your shopping cart.
Image note: Original AI-generated editorial illustration; generic objects shown, not branded product photography.
