Product Description
North American NEC standards identify white as the neutral conductor in single-phase and three-phase power systems. The PowerFit 400A Panel Source in white provides the neutral inlet for portable power distribution equipment, entertainment industry feeder systems, and industrial temporary power installations across the United States and Canada. The connector's 1000V AC / 1500V DC maximum voltage rating provides headroom above typical neutral-to-ground potentials, while the push-and-twist connection with patent key-release pin delivers both connection security and maintenance accessibility in a single mechanism.
Key Features
- 400A continuous current capacity at 120mm squared cable; 660A continuous at 240mm squared cable for heavy-duty applications
- Male contact design provides the power source pin for mating with Line Drain or Panel Drain connectors
- Patent key-release pin with POM (Polyoxymethylene) cotter pin enables tool-free disconnection without risking contact damage
- M12 threaded post with brass nut and spring washer for permanent, vibration-resistant panel installation
- Four diameter 5.5mm fixing holes on flange (42mm x 42mm cut-out dimension) ensure secure mechanical mounting
- Plastic end cap over male contact provides IP 2X finger protection against electric shock when unmated
- Push-and-twist locking mechanism maintains positive mechanical engagement across 500 rated mating cycles
- Brass contact with silver plating delivers 0.1 milliohms contact resistance for minimal voltage drop and heat generation
- Non-conductive thermoplastic housing rated UL94-V0 flame retardant for safety-critical installations
- IP67 rating while connected ensures protection against water and dust ingress in outdoor or washdown environments
- 1000V AC / 1500V DC maximum voltage rating with 4500V AC dielectric test voltage for substantial safety margins
- Maximum nut torque: 12 to 14 N/meter for proper fastening without over-tightening
Certifications & Standards
- TUV Rheinland certified (ID 1111303479) - Type Approved, Safety, Regular Production Surveillance
- CE marked for European market compliance
- RoHS (Restriction of Hazardous Substances) compliant
- REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) compliant
- UL94-V0 flame retardancy classification for the housing material
- IP67 environmental protection rating while mated (dust-tight, resistant to temporary submersion)
- Short circuit capacity: Up to 35.5 kiloamperes
- Insulation resistance: Greater than 5000 megohms at 500V AC
- Working temperature range: 45 to 85 degrees Celsius
Applications
- Three-phase neutral return connections in power distribution boards and transformer panels
- Generator neutral bonding points and neutral-ground connection management systems
- Unbalanced load management panels where neutral current capacity is critical
- Portable power distribution neutral bus inlets for entertainment and event production
- Industrial process power systems requiring dedicated high-capacity neutral connections
- Temporary power infrastructure neutral distribution for construction and mining sites
- UPS output neutral connections and bypass switch neutral routing panels
Compatibility
The PowerFit 400A Panel Source connector is compatible with major brands of single-pole power connector systems. Its M12 threaded post interface and push-and-twist mating mechanism with key-release pin ensure standardized connection geometry across certified suppliers. The male contact mates with PowerFit Line Drain and Panel Drain connectors. Verify mechanical and electrical specifications with your mating connector manufacturer to confirm impedance matching and safe operating parameters. Use the color-coded and mechanically keyed design as a visual safeguard to prevent cross-phase connection errors during installation or reconfiguration.
Phase / Wire Color Convention
| Region | L1 | L2 | L3 | N | Ground |
|---|---|---|---|---|---|
| NA 120/208V 1 | Green / G-Y | ||||
| NA 277/480V 2 | Green / G-Y | ||||
| IEC 60446 3 | Green-Yellow | ||||
| AU/NZ Legacy 4 | Green-Yellow | ||||
| China 5 | Green-Yellow |
1 North America 120/208V (NEMA / NEC) 2 North America 277/480V (NEMA / NEC) 3 Europe, UK, Australia (current IEC 60446)
4 Australia / New Zealand legacy (pre-IEC) 5 China (GB 50303) G-Y = Green-Yellow (earth/ground)
Frequently Asked Questions
What is PFPS-NW and why is it the starting point of power distribution?
PFPS-NW is a KUPO PowerFit 400A panel source connector with a white housing, designated for the Neutral (N) conductor under North America (NEC) conventions. Mounted permanently at generator outputs, main panels, and power supply enclosures, it is the origin point from which power flows outward through the PowerFit system. Despite being panel-mounted, it retains the key-release mechanism for convenient field disconnection. It is commonly deployed in agricultural and greenhouse operation applications. Agricultural power distribution faces moisture from irrigation, fertilizer chemicals, temperature extremes from greenhouse heating, and often rural locations far from electrical supply houses.
What electrical capacity does PFPS-NW provide as a panel source connector?
PFPS-NW is rated for 400 amperes continuous with 120mm2 cable, scaling to 660 amperes with 240mm2 cable. The maximum voltage rating is 1000V AC or 1500V 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 white housing on PFPS-NW indicate about its neutral assignment?
White identifies the Neutral conductor under North American NEC conventions. White is universally recognized across the USA and Canada as neutral, and using any other color for neutral in NEC-governed installations typically requires special marking or approval. On the Panel Source, the white housing is visible on the connector face at the power origin point. Color coding at the source end of the distribution chain is especially important because phase assignment errors at the panel propagate through every downstream connection. A dedicated white PowerFit connector for the neutral return path eliminates guesswork in three-phase-plus-neutral distribution systems.
What safety certifications does PFPS-NW hold for distribution panel use?
PFPS-NW is TUV Rheinland certified (ID 1111303479) under Type Approval, Safety, and Regular Production Surveillance categories. It also carries CE marking, RoHS compliance (Restriction of Hazardous Substances), and REACH compliance. The housing material achieves a UL94-V0 flammability rating, which is the highest classification for vertical flame resistance in plastics, meaning the material self-extinguishes within 10 seconds with no flaming drips. As the power origin point, the Panel Source undergoes the same TUV safety evaluation as the full PowerFit system, including the key-release mechanism and panel-mount retention.
How is PFPS-NW mounted in a distribution panel or generator output?
The PFPS-NW mounts through a 42 x 42mm panel cutout using four 5.5mm fixing holes. The M12 threaded post secures to the panel with the included brass nut and washer at 12 to 14 N/m maximum torque. Despite being a permanent panel-mount connector, PFPS-NW retains the PowerFit key-release mechanism, allowing field technicians to disconnect mating Line Drain connectors without tools. IP 2X finger protection and a plastic end cap protect the contacts when no mating connector is present. The Panel Source has a 55.3mm flange width and 50.7mm total depth, with a 42.5mm body diameter. It is shallower than the Panel Drain, requiring less clearance behind the panel.
What equipment and enclosures is PFPS-NW designed to mount in?
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 North America (NEC) color conventions, the white PFPS-NW ensures that phase identification remains consistent when mixing PowerFit connectors with existing inventory.