Permitted Uses of Flexible Metallic Tubing

FMT can be used _____.

a) in dry and damp locations
b) for direct burial
c) in lengths greater than 6 ft
d) for a maximum of 1,000V

See answer and applicable Code reference

The correct answer is: d) for a maximum of 1,000V

The installation requirements for flexible metallic tubing (FMT) and associated fittings are outlined in Article 360 of the 2011 NEC. More specifically, Sections 360.10 and 360.12 outline where you can and cannot use this type of product.