Product Description
North American 277/480V power systems commonly use a brown, orange, yellow phase sequence with a gray neutral. The NEC permits white or gray for the neutral conductor, and gray is commonly used for the neutral in 277/480V systems so it stays distinct from the white neutral of a 120/208V system. The PFLD-NGY-S120M40A delivers 400A-rated neutral connectivity for North American industrial, utility, and commercial systems that follow this color practice. With 400A capacity and rated for 1000 volts AC or DC, this female contact line drain connector provides the dependable, low-impedance neutral return path that powers data centers, manufacturing facilities, utility distribution networks, and modular power solutions across North America.
Key Features
- Rated Current: 400A rated
- Voltage Rating: 1000V AC/DC maximum
- Withstand Voltage: 4500V test (three seconds)
- Short Circuit: 16 kA for 1 s
- Insulation Resistance: Greater than 5000 megohms at 500V AC
- Contact Resistance: 0.1 milliohms nominal (at rated current)
- Operating Temperature Range: -25 to 125 degrees Celsius
- Mating Cycles: 500 cycles minimum
- Ingress Protection: IP67 when mated
- Not for current interruption: connect and disconnect only when the circuit is de-energized
Certifications & Standards
- Neutral Color Identification: Gray housing matches the neutral colors the National Electrical Code permits (white or gray)
- TÜV: Certified to IEC 61984 (ID 1111322264)
- CE Marking: Compliant with European Union directive requirements
- RoHS Directive: Compliant with 2011/65/EU (Restriction of Hazardous Substances)
- REACH Regulation: Registered and compliant with EC 1907/2006 (Registration, Evaluation, Authorisation, and Restriction of Chemicals)
- UL94-V0: Housing material meets highest flame-resistance classification
Applications
- North American utility-scale power distribution requiring 400A neutral capacity
- Industrial switchgear, load centers, and modular power systems integrated across the United States
- Heavy industrial machinery, process automation, and manufacturing facilities operating at 400A neutral duty
- Data centers and telecommunications infrastructure serving North American markets with high current neutral requirements
- Renewable energy installations (solar farms, wind turbines, battery energy storage) built to North American practice
- Portable and mobile power generation systems deployed across North American jobsites and facilities
- Marine platforms and offshore structures operating under North American marine electrical codes
- System expansions and upgrades to existing North American electrical infrastructure where color code consistency is essential
Compatibility
The PowerFit 400A Line Drain female contact connector is designed to be compatible with major brands of single-pole power connector. The push-and-twist coupling mechanism (non-CAM) delivers intuitive, reliable mating with consistent electrical and mechanical integrity throughout the product lifecycle.
Cable gland accommodation: M40 x 1.5 thread; cable Ø14 to 33 mm with insert CG-M4015-32, or Ø12 to 18 mm with insert CG-M4015. With the brass silver-plated R120 reduction sleeve, it accommodates conductors up to 16.50 millimeters in diameter.
Phase / Wire Color Convention
Frequently Asked Questions
What is the PFLD-NGY-S120M40A and what role does it play in a PowerFit system?
PFLD-NGY-S120M40A is a KUPO PowerFit 400A line drain connector with a gray housing, designated for the Neutral (N) conductor under USA 277/480V conventions. As the drain side of an inline cable connection, it receives the mating source contact and provides a sealed, IP67-rated junction when coupled. The gray housing enables instant visual identification of the N conductor across cable runs.
What are the electrical ratings and wire capacity of PFLD-NGY-S120M40A?
PFLD-NGY-S120M40A is rated for 400 amperes continuous with 120mm² cable. The maximum voltage rating is 1000V AC or DC. The silver-plated brass contact achieves a contact resistance of just 0.1 milliohms, significantly reducing resistive heating compared to plain brass contacts at sustained high-current loads. This low resistance is particularly important for N circuits carrying continuous neutral current.
What does the gray housing on PFLD-NGY-S120M40A indicate about its neutral assignment?
Gray identifies the Neutral conductor in USA 277/480V systems. The NEC permits white or gray for the neutral; gray is commonly chosen for the 277/480V neutral so it stays distinct from a 120/208V white neutral in the same building or inventory. On the Line Drain connector, the gray housing is visible along the full 190mm body length, making N identification easy even when cables are bundled tightly. The ergonomic rubber grip section also carries the color, so technicians can identify the phase while handling the connector. A dedicated gray PowerFit connector for the neutral return path eliminates guesswork in three-phase-plus-neutral distribution systems.
What certifications and safety ratings does PFLD-NGY-S120M40A carry?
PFLD-NGY-S120M40A is TÜV Rheinland certified to IEC 61984 (ID 1111322264) under Type Approval, Safety, and Regular Production Surveillance categories. It also holds CB and UKCA certificates, and carries CE marking, RoHS compliance (Restriction of Hazardous Substances), and REACH compliance. The housing material achieves a UL94-V0 flammability rating, which is the top rating in the UL94 vertical burn (V) series, meaning the material self-extinguishes within 10 seconds with no flaming drips. The silicone O-ring seal contributes to the IP67 rating when mated, meaning the connection is fully protected against dust ingress and temporary immersion in water up to 1 meter for 30 minutes.
Is PFLD-NGY-S120M40A compatible with single-pole connectors from other manufacturers?
PowerFit connectors are designed to be compatible with major brands of single-pole power connector. The silicone O-ring seals against irrigation moisture, the thermoplastic housing resists agricultural chemical exposure, and the push-and-twist mechanism does not require specialized tools that might not be available in remote locations. For N circuits using USA 277/480V color conventions, the gray PFLD-NGY-S120M40A ensures that phase identification remains consistent when mixing PowerFit connectors with existing inventory.