Thomas & Betts LTBUS08N-A LFMC SPLP UL 2-1/2IN GRN 8M/25FT

It's 2-1/2 inch trade size liquid tight flexible metallic conduit, supplied as a 25 foot (8 meter) coil under part number LTBUS08N-A.

Metallic. The LTBUS08N-A is liquid tight flexible metallic conduit (LFMC) built on a galvanized steel core with a jacket over it, so it gives you the physical protection of steel with a watertight outer covering. If your spec calls for non-metallic liquidtight (LFNC), this is not the same product.

Yes. Liquidtight flexible metallic conduit needs liquidtight connectors sized to the same 2-1/2 inch trade size, with the sealing gland and O-ring that make the connection watertight at the box or enclosure. Standard flex or EMT fittings will not seal it. The conduit ships as a bare 25 foot coil, so fittings are a separate order.

The green jacket on the LTBUS08N-A is a color-coded identification jacket. Contractors use colored liquidtight to distinguish circuits or systems on a job, for instance separating one service or voltage class from another at a glance in a crowded equipment room. Electrically and mechanically it is the same galvanized steel core liquid tight flexible metallic conduit as the standard color.

That's what liquidtight flexible metallic conduit is built for. The jacketed construction over the galvanized steel core keeps liquids out of the raceway, which is why it's the standard choice for outdoor equipment connections, wash-down areas, and damp mechanical spaces where a vibrating or movable connection is needed.

Use rigid for the fixed run and liquidtight flex like the LTBUS08N-A for the last few feet into the equipment. Motors, compressors, and rooftop units vibrate and sometimes need to be pulled for service, and a rigid raceway terminated straight into them transmits that vibration and makes removal a cutting job. The flexible metallic construction absorbs movement while the steel core still gives mechanical protection.