Respuesta :
The back-fill used for underground wiring shall not damage the raceways, cables, and conductors or prevent adequate compaction of fill or contribute to corrosion.
What do you mean by underground wiring?
A unique form of electric wiring or cable this is designed to be buried in a trench underground is known as Direct-burial cable. The character electric accomplishing wires in the cable are encased in a strong thermoplastic sheath that seals out moisture and protects the accomplishing wires within.
The complete question is given below:
(a) raceways
(b) cables
(c) conductors
(d) all of these
Thus, The back-fill used for underground wiring shall not damage the raceways, cables, and conductors or prevent adequate compaction of fill or contribute to corrosion.
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