Which wire type can you run in a plenum?
Plenum cables are coated with flame retardant and made using special plastics that don’t smoke nearly as much as other plastics to help prevent this problem. Any cable that you run through plenum spaces must be plenum rated, even wiring used for information transfer, like Cat5 wiring.
What makes wire plenum rated?
Plenum rated cable has a special insulation that has low smoke and low flame characteristics. Plenum cable is mandated to be installed in any “air handling” space. For example, most large office buildings use the ceiling to return air to the AC unit.
Where is plenum rated cable required?
When should you use plenum cable? Most building codes mandate that only plenum-rated (CMP) cable be used in “plenum spaces” and air ducts. For large public spaces like hospitals, schools, and airports, building codes in some cities and towns mandate plenum cable even for non-plenum spaces.
Should we use plenum or riser rated cables?
The type of installation determines which cable, riser or plenum, is used. If the installation only goes between floors in non-plenum areas, riser cable is sufficient. If budget is an issue, riser cable is usually cheaper than plenum rated cable. However, for use in plenum areas, always best use plenum rated cable.
Is Romex plenum rated?
Regular type NM cable (what’s generally called Romex) is not plenum rated. Type AC cable (often incorrectly called BX) is allowed in plenums, however. The main concern is the toxic fumes that the plastics used in most wire insulation release when they’re heated or burned.
When should plenum cable be used?
If you have a large wall or ceiling return air grate; remove and see if there the air is channeled through sheet metal ducting. If there is no sheet metal duct; just the open ceiling or wall space, then you are required by law to use Plenum Rated cable.
Are zip ties plenum rated?
Plenum Rated Cable Ties are constructed using high quality materials that can meet local fire codes. Plenum rated ties are designed to be installed into plenum air spaces, are self-extinguishing, and are extremely resistant to chemicals and abraison….Products specifications.
| Length | 14 Inch |
|---|---|
| Weight (Lbs) | 0.52 |
Can I run Romex through a cold air return?
On the other hand, it’s common practice to run Romex perpendicularly across a panned stud cavity or joist bay used as a cold air return duct. In such a case, we drill into the framing on both sides of the panned return, pull the cable through the holes, then seal the holes around the Romex with caulk.
Can Romex be used in a plenum ceiling?
Section (B) Ducts or Plenums Used for Environmental Air. Basically NM Or Non-Metallic sheathed cable (Romex) is not allowed. The reason being, is that if it were exposed to fire or excessive heat the molded plastic cover and wire insulating would break down.
What color are plenum rated zip ties?
maroon/burgundy color
Cables and cable ties meant for air handling (plenum) spaces are often called “plenum-rated”. Plenum-rated cable ties will almost always come in their signature maroon/burgundy color.
Can you run Romex in a plenum?
Can Romex touch ductwork?
As long as there are no sharp edges in the chase that might physically damage the cable, there’s no code violation if Romex touches metal hvac supply or return ducts.
Can you run cable through cold air return?
Yes, it is within code to run a low voltage wire inside an air return (aka plenum) in the US. You’ll even find cable that is “plenum rated” — which means it has a lighter jacket on it — that is specifically meant for use in plenums where it’s less likely to encounter sharp edges or be overly stretched during pulls.
Are tie wraps plenum rated?
Plenum rated cable ties can be used above drop ceilings and below raised flooring where fire resistant zip ties are needed. The plenum rated ties are UL 62275 certified for low smoke and low heat release.
What does plenum rated cable ties mean?
Plenum-rated cable ties have to pass specific tests and requirements in order to become UL approved. These tests measure the amount of toxic fumes, heat, and smoke released in case of fire.
Can you run Romex through a cold air return?
Is Velcro plenum rated?
The features of the VELCRO® Brand ONE-WRAP® fasteners include: Plenum Rated – suitable for use in air handling spaces in accordance with Section 300.22 (C) and (D) of the National Electrical Code.
Are all zip ties plenum rated?
Plenum rated ties are designed to be installed into plenum air spaces, are self-extinguishing, and are extremely resistant to chemicals and abraison….Products specifications.
| Length | 14 Inch |
|---|---|
| UL Flame Rating | 94V-2 |
| SKU | AH-14050-BU |
| GTIN | 00846949008710 |
| Weight (Lbs) | 0.52 |
What are plenum rated zip ties?
Plenum Rated Cable Ties are constructed using high quality materials that can meet local fire codes. Plenum rated ties are designed to be installed into plenum air spaces, are self-extinguishing, and are extremely resistant to chemicals and abraison.