This number is on the rise considering anything “digital” (meaning anything that uses semiconductors, such as cellphones), and anything with a battery, all require DC power. In fact, currently about 74% of total electrical loads in homes need DC power to operate (if they power electric vehicles and have HVAC equipment with a DC motor). As a result, DC power distribution saves buildings an increasing amount of energy, especially as an increasing proportion of power loads in buildings require DC power. Class 4 power systems can also distribute DC power, so they also eliminate these inefficient conversions from AC to DC by DC powered devices. These conversions (executed by converters inside device drivers) are typically very inefficient, wasting between 5% - 20% of energy consumed by a DC powered load. The main benefit of this is to provide DC power to DC powered devices, thus eliminating conversions from AC to DC, that DC powered devices would otherwise have to make. 2) Elimination of Inefficient AC to DC Convertersīoth PoE and Class 4 power systems are DC power distribution systems, meaning they distribute DC power rather than AC power. Typically Class 4 power systems like these can safely provide higher voltages, can make use of low-voltage wiring practices, don’t need to be used with PoE enabled devices, and have the same (or greater) distance capabilities as alternating current (AC) power. Class 4 power systems, like Pulse Current, Digital Electricity™ and Digital Current™, bring the best of both of these worlds together. Because of these limitations, it’s not usually justifiable for higher-power applications, like lighting. It also only works with PoE enabled devices. However, it’s limited to about 90 W of power, and usually between 44 and 57 volts DC (nominally 48 volts DC). Power over Ethernet (PoE) is well known for using low-voltage wiring practices, being safe to handle, and delivering both power and data over one cable. The main benefits of a Class 4 power system are most obvious when compared to Class 2 power systems (for example, Power over Ethernet). Main Benefits of Class 4 Power (CL4) Systems 1) Higher Power UL is also expected to publish an outline of the requirements for fault-managed power systems, under UL 1400-1.
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