What are the voltages of the small busbars in volts

Small busbars typically have a voltage rating below 1 kV, commonly 220V or 380V.

Small busbars, such as those used on PC boards or in low-voltage distribution systems, are designed primarily for low-voltage applications, where insulation and arcing protection are the main considerations rather than the busbar material itself . According to IEC 61439 standards, low-voltage busbars are rated for voltages up to 1000 V AC or 1500 V DC, but in practical industrial and commercial systems, small busbars are commonly rated at 220V or 380V . The voltage rating ensures that the busbar can safely handle the electrical potential without causing insulation breakdown or arcing. While the busbar itself is metallic and conducts electricity, the insulation, standoffs, and mounting design determine the maximum safe voltage . In smaller PC-board applications, the busbar may also serve as a mechanical stiffener, but the voltage rating remains governed by the low-voltage system requirements . In summary, for a small busbar used in typical low-voltage systems, you can expect a voltage rating in the range of 220–380 volts, with the upper limit rarely exceeding 1 kV, depending on insulation and safety standards .