The NEC added the Class 4 rating in November 2022 in Article 726. This rating is applied to power systems that can provide up to 450V DC, and have fault-management built-in for safety. You can think of Class 4 rated power systems as a combination of Class 2 power systems (such as PoE), and traditional AC power. Class 2 and Class 4 both provide suitable protection from fire and shock hazards, but PoE can only provide up to 100 W of power. Read our blog to learn more about Class 4 Power Systems.
Reduces cable size, saving operational costs and capital investment in cabling.
Less voltage drop along cables compared to AC power at the same voltage.
Cence intelligently stops power as soon as a fault (like human touch) is detected.
Anatomy of the Cence Class 4 Power System
Cables in low voltage, high power, applications (such as traditional telecom rectifiers) require larger cable gauges to support the current needed.
Cables in Class 4 systems have a gauge that is about 10x smaller than the gauge of a cable with 48V DC running through it, carrying the same amount of power.
Why higher voltages reduce cable gauge size and voltage drop
Increase battery backup capacity
Batteries only store DC power (not AC). Distribute DC power with Cence to improve battery capacity, and keep telecom sites in operation for up to 8 hours if power fails
Reduce voltage drop along cables
Save on operating costs by reducing voltage drop with Cence. Cence distributes DC power, and less typical line losses affect DC, as opposed to AC power.
Onboard computers in the Cence Class 4 power system continuously monitor cables for faults, such as human touch, and stop power immediately if one is detected. This enables Cence to distribute up to 450V DC of power to telecom applications, while safely making use of low voltage wiring practices.
See the full list of faults monitored for by Cence
A hybrid cable incorporates optical fibers (for data transmission) and copper wires (for power transmission) within the same jacket. They are a distribution medium for both Class 4 power and 5G. Hybrid cables enable long-distance power supply while ensuring high-speed data transmission.
Optical Fibres for data transmission
Copper Wire for Class 4 DC power transmission
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Implement Cence to reduce your power consumption by up to 40%.