Excluding exceptions, why are voltage ratings not marked on Class 2 and Class 3 cables per the listing requirements of Part IV of Art. 725? A) Because voltage markings on these cables may be ...

Explanation: NEC Table 514.3(B)(1) lists the area up to 18 in. above grade extending 20 ft horizontally in all directions as Class 1 Division 2. Lupacchino is a senior design engineer with Gaylor ...