In rigid metal conduit wiring conduit of 15-20mm diameter shall be supported at least every ______.
A. 2 500mm
B. 3 500mm
C. 1 800mm
D. 3 000mm
Answer:D
In rigid metal conduit wiring conduit of 15-20mm diameter shall be supported at least every ______.
A. 2 500mm B. 3 500mm C. 1 800mm D. 3 000mm