Wiring Methods & Materials第 71 / 120 题
At what maximum interval must Type MC cable be supported and secured?
a.Every 3 feet, and within 12 inches of every termination
b.Every 4 and 1/2 feet, and within 12 inches of every termination
c.Every 10 feet, and within 3 feet of every termination
d.Every 6 feet, and within 12 inches of every termination
解析
Type MC cable is secured at intervals not exceeding 6 feet and within 12 inches of every box, cabinet or fitting where the cable terminates. The 4 and 1/2-foot interval belongs to Types NM and AC, and the 10-foot interval belongs to EMT and other rigid raceways.
法律依据: 2023 NEC §330.30免费刷完整 120 道题库 — 无需注册。
同考点相关题目
- A GFCI-protected 120-volt, 20-ampere residential branch circuit is direct buried in a yard. What is the minimum cover?
- How must electrical metallic tubing be secured and supported on a normal horizontal run?
- How must Type NM cable be supported where it enters a box equipped with cable clamps?
- At what maximum interval must Type AC cable be supported?
- What is the maximum support spacing for a 1-inch trade size rigid PVC conduit?
- What is the maximum total amount of bend permitted in one run of EMT between pull points?