Product Description
The PowerFit 400A Line Drain connector in yellow identifies Line 3 (L3) in the brown, orange, yellow phase sequence commonly used for USA 277/480V systems. It suits 480V feeder runs, generator distribution, and touring or industrial systems built to that North American convention, where a dedicated yellow L3 connector keeps phase identification clear. The female contact push-and-twist design supports 400 amperes at up to 1000V AC/DC, while the non-conductive thermoplastic housing and silver-plated brass contacts provide corrosion immunity and stable long-term electrical performance. TÜV certification and IP67 mating protection round out a connector engineered for clear phase recognition in high-current power distribution.
Key Features
- L3 Phase Recognition: Yellow coding identifies this connector as Line 3 in the brown, orange, yellow sequence common in USA 277/480V systems; this is widely used practice rather than a code requirement, so confirm it against the project wiring drawing.
- Silver-Plated Brass Contacts: Superior tarnish and corrosion resistance; maintains contact resistance at 0.1 milliohms in salt spray, humidity, thermal cycling, and chemical environments that would degrade plain brass.
- High Impact-Resistant Thermoplastic Housing: Non-conductive material absorbs mechanical shock and resists UV degradation, chemical attack, and temperature extremes without fracturing or leaching contaminants.
- Key-Release Pin (Source Connectors): Single-handed, tool-free disconnection on mated pairs; unique spring-loaded mechanism ensures safe separation without risk of accidental re-engagement or partial contact.
- Dielectric Test to 4500 Volts AC: Exceeds many industrial standards; confirms insulation integrity and leakage path safety even in moisture-saturated or contaminated environments.
- TÜV Type Approval with Surveillance: Continuous third-party monitoring of production quality; regular audits and testing ensure every unit meets specification regardless of volume or run time.
- Not for current interruption: connect and disconnect only when the circuit is de-energized
Certifications & Standards
- Yellow identifies L3 (Line 3) in the brown, orange, yellow sequence commonly used for USA 277/480V systems. Matching the housing color to that convention reduces guesswork when 480V systems sit alongside 120/208V or IEC-colored equipment in the same inventory.
Applications
- Complete three-phase power distribution requiring all three phase inline connectors
- Large-scale touring production feeder cable systems for arenas and stadiums
- Industrial automation and motor drive power distribution cabling
- Welding power supply connections and high-current process equipment
- Marine and shipboard temporary power connections with environmental sealing
- Portable substation feeder cables for utility and emergency power deployment
- Commercial and institutional power distribution during renovation or expansion
Compatibility
The PowerFit 400A Line Drain connector is compatible with major brands of single-pole power connector systems. Its push-and-twist mating mechanism ensures standardized connection geometry across certified suppliers. The female contact mates with PowerFit Line Source and Panel Source connectors. Verify mechanical and electrical specifications with your mating connector manufacturer to confirm 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
Frequently Asked Questions
What makes PFLD-3Y-S120M40A different from a standard inline power connector?
PFLD-3Y-S120M40A is a KUPO PowerFit 400A line drain connector with a yellow housing, identifying Line 3 (L3) 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 yellow housing enables instant visual identification of the L3 conductor across cable runs.
How much current can PFLD-3Y-S120M40A safely handle in continuous operation?
PFLD-3Y-S120M40A is rated for 400 amperes continuous with 120mm² cable. The maximum voltage rating is 1000V AC or DC. The insulation resistance exceeds 5000 megaohms at 500V AC, and the test voltage rating of 4500V AC provides substantial safety margin. Its short-time withstand rating is 16 kA for 1 second.
What does the yellow housing on PFLD-3Y-S120M40A represent under USA 277/480V conventions?
Yellow marks L3 in the brown, orange, yellow phase sequence that is common practice for USA 277/480V systems. In that convention the sequence is brown (L1), orange (L2), yellow (L3), with a gray neutral. It is widely used, but the NEC does not mandate phase colors, so always confirm against the project wiring drawing. On the Line Drain connector, the yellow housing is visible along the full 190mm body length, making L3 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. Because yellow means L2 in the old UK sequence and is part of the green-and-yellow earth marking under IEC, clear phase labeling remains essential on international projects.
How is PFLD-3Y-S120M40A certified for professional use?
PFLD-3Y-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.
What tools and steps are needed to terminate PFLD-3Y-S120M40A?
To assemble PFLD-3Y-S120M40A, remove the M40 cable gland and extract the contact. Insert the contact into the insulator and align the cotter pin hole. Strip back the cable jacket by approximately 33mm, then slide the R120 reduction sleeve (brass with silver plating, up to 16.50mm wire diameter) over the exposed conductor. Hammer the cotter pin in from its chamfered side for proper seating. Slide the cable with reduction sleeve into the contact, then tighten both set screws using a 5mm hex key to a minimum of 10.5 N·m. Finally, thread the cable gland back on. The M40 gland takes cable Ø14 to 33 mm with insert CG-M4015-32, or Ø12 to 18 mm with insert CG-M4015. At 190mm total length with a 32.5mm body diameter, the Line Drain is the longest connector in the PowerFit family, providing ample space for cable management and a secure grip surface.
Can PFLD-3Y-S120M40A be integrated into an existing power distribution system?
PowerFit connectors are designed to be compatible with major brands of single-pole power connector. Color-coded phase identification reduces the training needed for correct connection, the push-and-twist mechanism is intuitive even under stress, and IP67 protection means the connectors function in standing water. For L3 circuits using USA 277/480V color conventions, the yellow PFLD-3Y-S120M40A ensures that phase identification remains consistent when mixing PowerFit connectors with existing inventory.