Overview#
The Cummins C50 N6 is a 50 kW (63 kVA) standby natural gas generator set for small commercial and light industrial applications. The unit runs on natural gas or propane vapor (field selectable) and is equipped with PowerCommand controls providing isochronous governing and AmpSentry alternator protection. It carries UL 2200 listing and EPA certification for stationary emergency use.
The C50 N6 fills the gap between Cummins' residential gas lineup and mid-range commercial units. It is commonly deployed in small office buildings, retail stores, restaurants, and light manufacturing facilities where 50 kW covers life safety and critical branch loads.
Technical Specifications#
| Parameter | Value |
|---|---|
| Standby Rating | 50 kW (63 kVA) |
| Frequency | 60 Hz |
| Power Factor | 0.8 |
| Fuel Type | Natural gas / LPG |
| Cooling | Liquid |
| Rated Speed | 1800 rpm |
| NG Fuel Consumption (Full Load) | ~500 CFH |
Our Service Experience#
The C50 N6 is a reliable, low-maintenance unit. The small gas engine has fewer cylinders than mid-range models, which keeps spark plug service quick. The most common service calls involve spark plug replacement and gas regulator adjustment. Battery condition should be load-tested annually -- fail-to-start events caused by weak batteries are the most frequent issue on standby gas units in this size class.
Gas pressure at the engine inlet must be verified under load, not just static. We have seen installations where static pressure is adequate but dynamic pressure drops below specification at full load, causing lean-running and speed droop.
Frequently Asked Questions#
What is the standby rating of the C50 N6? 50 kW (63 kVA) at 60 Hz, 0.8 power factor. This is an Emergency Standby Power (ESP) rating for both natural gas and propane vapor.
What are the service intervals? Oil and filter at 500 hours or 12 months. Air filter at 500 hours. Spark plugs at 1,000 hours. Major overhaul at 30,000 hours.
How does the C50 N6 compare to the C50 D5 diesel? The C50 N6 runs on natural gas or LPG instead of diesel fuel. This eliminates fuel storage tanks, delivery logistics, and fuel degradation concerns. Operating cost per kWh depends on local gas vs diesel pricing. The gas unit requires spark plug maintenance that the diesel does not, but avoids diesel-specific items like fuel filters and injector service.
Can OnPoint Generators service the C50 N6 in Northern California? Yes. OnPoint Generators provides authorized Cummins natural gas generator service across the San Francisco Bay Area, Silicon Valley, and Northern California.
