N.C. Gen. Stat. § 160B-15

The net indebtedness in the form of general obligations of a consolidated city-county for school purposes may not exceed eight percent (8%) of the appraised valuation of taxable property in the county. The net indebtedness in the form of general obligations of a consolidated city-county for all purposes other than for schools or water, sewerage, gas and electric purposes may not exceed eight percent (8%) of the appraised valuation of taxable property in the county. No other debt limitations applying to counties and municipalities in North Carolina apply to a consolidated city-county.