3M Standard Cable Ties CT11_50-C

Yes. The 3M Standard Cable Ties CT11 series are UL Listed 62275 Type 21 or 21S and carry a Plenum Rating of AH-2 for use in air handling spaces, so they can go above a plenum ceiling where the inspector requires plenum-rated bundling hardware.

The CT11 tie is 11.1 inches in overall length, which is the full strap including the head. Once you account for the head and the tail you need to grip, that is sized for bundles up to roughly the mid-3-inch diameter range. For anything larger, step up to a longer tie rather than chaining two together.

The 3M CT11_50-C is a single uniform tie: 11.1 in long, 50 lb tensile strength, packed 100 per bag, and ordered by color as either Natural (NT) or Black (BK). The Burndy CTASST is a Unirap canister variety pack containing a mix of natural and black ties rather than one length and strength. Pick the 3M CT11_50-C when a job calls for one repeatable size and rated strength on every bundle; pick the Burndy assortment when a service van needs a spread of tie sizes on hand.

The 3M CT11_50-C is UL Listed 62275 Type 21 or 21S and Plenum Rated AH-2 for use in air handling spaces, so it is the one to specify when the bundle runs above a ceiling used as a return air plenum. The Burndy CTASST is a Unirap variety pack, and a mixed canister does not give you a single stated plenum rating to put on a submittal. For inspected plenum work, order the 3M CT11_50-C and keep the assortment for general bundling.

Rated at 50 lbs tensile (22.68 kg). That is the standard-duty class, fine for securing wire bundles and harness components, control wiring, and low-voltage runs. For heavy feeder cable or anything taking mechanical load or vibration, specify a heavy-duty tie with a higher tensile rating instead.

Yes, the CT11 standard cable ties are made in the USA, which matters on government, education, and other publicly funded work carrying domestic sourcing requirements.

The 3M CT11_50-C carries a rated operating range of -40 F to 185 F (-40 C to 85 C), which covers winter rooftop and unconditioned attic conditions. The Burndy CTASST is sold as a Unirap canister assortment of natural and black ties, so it is chosen for size variety on the truck rather than for a single temperature-rated spec. If the run sees outdoor temperature swings, specify the 3M CT11_50-C in Black (BK), which is the usual choice for exposed locations.

Standardizing on the 3M CT11_50-C gives one part number per color in 100-count packs at a fixed 11.1 in length and 50 lb tensile strength, which makes reorder and spec compliance simple across a facility. The Burndy CTASST Unirap canister covers a range in one SKU, which suits a shop that bundles many different diameters and does not need every tie to match. Many buyers do both: the 3M tie as the standard for rated work, the assortment for incidental repairs.

The tail has a curved tip, which feeds into the head on the first try instead of making you fish for it. On overhead work or inside a crowded panel, that is the difference between one hand and two. The pawl design is made to secure bundles without slipping back once pulled.