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Manufacturer Resources
Product Specs
- Number Of Batteries:
- 0
- Product Net Depth Length:
- 50 ft15 m
- Product Type:
- Liquid Tight Flexible Metallic Conduit
- Department:
- Electrical
- Product Color:
- Yellow
- Product Material:
- Galvanized Steel Core
Thomas & Betts LTBUS06Y-B – Frequently Asked Questions
1) What size conduit is the Thomas & Betts LTBUS06Y-B, and how much comes in a roll?
It's 1-1/2 inch trade size liquid tight flexible metallic conduit, supplied in a 50 foot (15 m) coil. One roll is one continuous length, so plan your runs against that 50 feet rather than assuming you can splice mid-pull.
2) Can I use this 1-1/2 inch liquidtight for an outdoor rooftop HVAC unit connection?
That's the normal use for it. Liquid tight flexible metallic conduit is the wiring method for wet locations and for equipment that vibrates or needs a bit of movement, which is exactly a rooftop condenser, pump, or motor whip. The plastic jacket sheds water and the steel core takes the abuse. You'll need liquidtight connectors at each end, sold separately, in the matching 1-1/2 inch trade size.
3) Why is this liquidtight conduit yellow instead of the usual gray?
Yellow jacket on the LTBUS06Y-B is a color-code choice, not a different construction. Crews use colored liquidtight to distinguish circuits or systems at a glance, for example separating emergency, control, or a particular voltage class from the standard gray runs. The core is the same galvanized steel.
4) Does liquidtight flexible metallic conduit give me an equipment ground, or do I still pull a ground wire?
The LTBUS06Y-B is built on a galvanized steel core, which is what makes it a metallic wiring method rather than a plastic one. Standard practice on LFMC is to pull a separate equipment grounding conductor inside and land it at both ends, and to use listed liquidtight fittings so the connection at the box is sealed and bonded. Size the ground for the overcurrent device on the circuit.
5) Is 1-1/2 inch liquidtight the right size, or should I step down to 1 inch or 1-1/4?
Size off your conductor fill, not off the equipment opening. At 1-1/2 inch the LTBUS06Y-B is toward the large end of the liquidtight range and is normally used for feeder-size conductors or multi-conductor motor feeds. For a small motor whip or a few control conductors, a smaller trade size bends easier, costs less to terminate, and is usually the better call. Going oversize also means a stiffer bend radius in tight equipment spaces.
6) Will this metallic liquidtight work where I'd otherwise use the nonmetallic gray flex?
Not interchangeably. The LTBUS06Y-B has a galvanized steel core, so it resists crushing and physical damage in a way liquidtight nonmetallic (LFNC) does not, and it behaves as a metallic raceway. LFNC is lighter and easier to route but is limited in where it can be run and in length in some applications. If your drawing or inspector calls out LFMC, the steel core version is what you need.
7) What's the exact part number for the 1-1/2 inch yellow Thomas & Betts liquidtight?
Thomas & Betts LTBUS06Y-B. The -B suffix denotes the boxed 50 foot coil, and the Y in the number is the yellow jacket.
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Does the Thomas & Betts LTBUS06Y-B come with a warranty?
Absolutely. The Thomas & Betts LTBUS06Y-B is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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