For transformers rated at 1,000 volts or less, the secondary overcurrent protection device may be split into up to how many devices?

For transformers rated at 1,000 volts or less, the secondary overcurrent protection device may be split into up to how many devices?

• A. Two
• B. Four
• C. Six
• D. Eight

Answer: (C)

For transformers rated at 1,000 volts or less, you can divide the secondary overcurrent protection among multiple devices to sectionalize the secondary circuits and improve fault isolation. The maximum number you may split into is six. This limit gives enough flexibility to feed several downstream circuits or secondaries while still allowing proper coordination with the transformer’s impedance and the protection on the primary side. Using more than six would overcomplicate coordination and potentially undermine reliable protection, while fewer than six is simply a more limited, but still compliant, arrangement.

For transformers rated at 1,000 volts or less, you can divide the secondary overcurrent protection among multiple devices to sectionalize the secondary circuits and improve fault isolation. The maximum number you may split into is six. This limit gives enough flexibility to feed several downstream circuits or secondaries while still allowing proper coordination with the transformer’s impedance and the protection on the primary side. Using more than six would overcomplicate coordination and potentially undermine reliable protection, while fewer than six is simply a more limited, but still compliant, arrangement.