NEMA 15-50 Power Supply Cords 50 Amp 250V
The NEMA 15-50 power cords are robust, industrial-grade electrical cable engineered for three-phase high-power applications, such as kilns, heavy machinery, generators, and commercial equipment. It features a 4-wire NEMA 15-50P straight-blade plug (three hot wires and a ground, no neutral) for secure connection to a matching NEMA 15-50R receptacle, delivering up to 12,500 watts at 250V AC in a 3-phase configuration. This setup is ideal for balanced three-phase power distribution, ensuring efficient operation in demanding environments. Available in lengths from 3FT to 100FT (custom options prevalent), it is UL-listed for safety and often uses flexible STW-jacketed cable for durability in industrial or outdoor settings.
Technical Information
- Plug Type: NEMA 15-50P (4-wire: 3 Hot, Ground; 3-phase)
- Electrical Ratings:250 Volts AC (3-phase) 50 Amp
- Receptacle Required: NEMA 15-50R
- Safety Certification: UL Listed, cUL
- Colors: Black, Yellow, Custom color
- Operating Temperature: -40°F to 194°F (suitable for harsh conditions)
- Applicable Cables: 4 conductors: Black/Red Hots, White Neutral, Green Ground
- Cable Length Options: 6FT, 10FT, 25FT, 50FT (custom up to 100FT)
| LA009D | 6/3 + 8/1 | STW, SOW | 45/250 |
| XH211 | 6/3+8/1 | ST, STW, STO, STOW, STOO, STOOW | 50/250 |
Common Applications
- Three-phase kilns and ceramic ovens (e.g., Easy-Fire models).
- Industrial generators, welders, and plasma cutters in fabrication shops.
- Heavy motors, pumps, or compressors in manufacturing and HVAC systems.
- Commercial backup power extensions or temporary 3-phase setups on job sites.
Benefits
- High-Efficiency Operation: Three-phase design minimizes power loss and heat buildup, enabling consistent performance for energy-intensive tasks like kiln firing or generator backups.
- Code-Compliant Reliability: UL and CSA listings ensure it meets stringent safety standards, facilitating inspections in commercial or industrial facilities.
- Versatile Longevity: Weatherproof materials extend cord life in variable conditions, reducing downtime and maintenance costs compared to standard cords.
- Scalable for Pros: Handles 50A loads without voltage drop over moderate distances, supporting scalable setups from small shops to large manufacturing lines.
- Eco and Safety Focus: RoHS/REACH compliance limits hazardous materials; grounding reduces shock risks in high-voltage 3-phase systems.
Installation Notes
- Verify the receptacle is a NEMA 15-50R rated for 50A/250V 3-phase; incompatible with single-phase outlets.
- Connect wires: Three hots (black/red/blue) to X/Y/Z terminals, green to ground screw—use torque specs from equipment manual.
- Apply strain relief at both ends to secure against movement or vibration.
- De-energize the circuit at the breaker before installation; hire a qualified electrician for 3-phase wiring to ensure phase balance.
- Limit total length to avoid excessive voltage drop (e.g., under 100FT with 6 AWG); test for continuity post-install.
NEMA 15-50 Power Cord Manufacturer
CablesGo manufactures industrial-grade NEMA 15-50 power cords, engineered with a 50 Amp, 250V, 4-wire configuration to deliver robust three-phase power for demanding applications such as industrial kilns, heavy machinery, and three-phase generators. Produced in our certified 30,000+ sqm Ningbo facility, each unit undergoes rigorous 100% in-house Hi-Pot and continuity testing to ensure full compliance with UL standards. We offer flexible customization of cord length and jacket color with a competitive 50-piece MOQ, supported by global operations that guarantee reliable 10-15 day lead times and cost-effective pricing.
