(A) Securely Fastened
Exception No. 1: Where LFMC is fished between access points through concealed spaces in finished buildings or structures and supporting is impractical.
Exception No. 2: Where flexibility is necessary after installation, lengths from the last point where the raceway is securely fastened shall not exceed the following:
- 900 mm (3 ft) for metric designators 16 through 35 (trade sizes (1/2 through 11/4)
- 1200 mm (4 ft) for metric designators 41 through 53 (trade sizes 11/2 through 2)
- 1500 mm (5 ft) for metric designators 63 (trade size 21/2) and larger
For the purposes of the exceptions, listed LFMC fittings shall be permitted as a means of securement and support.