Voltage Rating: Most residential HVAC systems run on 208/240V or 120V circuits; the distribution box must be rated accordingly. Breaker Type And Tripping Characteristics: Use time-delay (slow-blow) types for motors to handle startup currents, or as recommended by the equipment. A distribution box is a low-voltage electrical enclosure that receives incoming power and distributes it safely to multiple outgoing circuits through protective and switching devices such as MCBs, RCDs, RCBOs, fuses, isolators, busbars, neutral bars, earth bars, and surge protective devices. The. Fan distribution box is a kind of equipment that can be used for fan power consumption. It is a vital part and central hub of any electrical system. Whether it's a home, office, or factory, the DB box makes sure power. The Series Fan VAV terminal boxes are fitted with fan casings (Scrolls) manufactured from sheet steel. All fan motors are direct drive resiliently mounted via location brackets suitable for 230 volts 50 Hz single phase and are supplied with auto reset. The KLPS, KLPS-D, KFSS, KQFS, KQFS-FA & QFC constant volume (series) and KLPP, KQFP & QFV variable volume (parallel) fan powered boxes (see Figure 1 & 2) are equipped to provide pressure independent, variable volume (VAV). The units can also be equipped with factory-installed Analog, Pneumatic. Distribution board is a safe system designed for house or building that included protective devices, isolator switches, circuit breaker and fuses to connect safely the cables and wires to the sub circuits and final sub circuits including their associated Live (Phase) Neutral and Earth conductors.