Thomas & Betts LTBUS05Y-B LFMC SPLP UL 1-1/4IN YLW 15M/50FT

Metal. The LTBUS05Y-B has a galvanized steel core spiral under the liquidtight jacket, so it is LFMC rather than the nonmetallic LFNC. That matters on the job because the steel core gives you the physical crush and abrasion resistance plastic whip does not, and it is the type normally specified for motor connections and equipment whips in wet or oily areas.

One coil of LTBUS05Y-B is 50 feet (15 m) of 1-1/4 inch liquid tight flexible metallic conduit. It ships as a coil roughly 25-1/4 x 24-1/2 x 8-1/4 inches, so plan rack or truck space accordingly if you are ordering several.

In most installations, yes. LFMC like the LTBUS05Y-B is only recognized as an equipment grounding path within limited lengths and ampacities, so the common trade practice on a 1-1/4 inch run, which usually feeds larger motor loads, is to run a separate equipment grounding conductor inside the conduit. Size the ground to the overcurrent device protecting the circuit.

The Thomas & Betts manufacturer part number is LTBUS05Y-B, UPC 786210112626. Quote that number when matching an existing run, because the -Y suffix is what distinguishes the yellow jacket from the other colors in the LTBUS series.

Yes, that is the normal use. The 50 foot coil of LTBUS05Y-B is cut to length on site for motor leads, machine drops, and disconnect-to-equipment whips, then terminated with 1-1/4 inch liquidtight connectors at each end. Cut through the jacket and steel core square so the connector ferrule seats and the seal holds.

The LTBUS05Y-B is jacketed in yellow, which crews commonly use to color-code a run so it can be identified at a glance in a plant or on a machine skid. Electrically and mechanically it is the same construction as any other jacketed liquid tight flexible metallic conduit in the family: a galvanized steel core with a liquidtight jacket over it.