GFCI protection will be required for a branch-circuit disconnect rated at a minimum of how many amperes?

• A. 1000 A
• B. 100 A
• C. 10 A
• D. 10,000 A

Answer: (A)

GFCI protection is used to detect ground faults and quickly shut off power to prevent shock. For branch-circuit disconnects, the rule sets a minimum rating that triggers this protection: if the disconnect is rated at 1,000 amperes or more, GFCI protection is required. That 1,000 A threshold is the smallest rating at which the protection must be applied, and any device rated higher (like 10,000 A) also requires it, but 1,000 A is the minimum that triggers the requirement. The other options (10 A, 100 A) are below this threshold and do not meet the criterion.