A ballast intended to be supported only by rigid metal conduit, a fixture stud, or similar devices shall comply with the requirements in Section 18, Pullout, Bending, and Twisting Tests.

• 整流器只能由刚性金属导管支撑,装配螺栓或相似的部件必须符合18条,通过拉力、弯曲和扭转测试。