junction box in cold air return You are right, the NEC does not allow junction boxes in plenums, and since my HALO fixture has a junction box on it, that would violate this code. The return air plenum is in .
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Direct access to the junction box is not a problem as the cold air return grate is right where I’d need the junction box to go. Removal of the grate and access to the junction box would be easy. Any ideas?If your local government follows National Electrical Code (NEC), then you should not install a junction box for the light in the duct. If you don't follow NEC, it's still probably a bad idea. The boxes and cable are a good place for dust, dirt, and . I think I need to pull that wire back up into the joists, put in a junction box, and run the new wire over above the stud where the new outlet . If you need to, you can install a junction box in the cold air return as long as you use "plenum-rated" materials such as a metal junction box, metallic wiring method like MC or .
The joist space is covered with sheet metal and used as a cold-air return for a forced warm-air central heating system. Equipment such as junction boxes or device .
You are right, the NEC does not allow junction boxes in plenums, and since my HALO fixture has a junction box on it, that would violate this code. The return air plenum is in . We typically build a little box around the device box with scrap pieces of 2x4 if the device must be in a stud bay cold air return. Boxing in the box effectively removes it from the .
Chris also said in the opening post that it is not allowed to place an electrical box in the cold air return. This is only true of non-metallic boxes, correct? I believe a metal box can . The space between 2 studs in a bedroom wall is being used as a cold air return for the heating system. Can I put a switch for a light in this cold air return?
cold air return wiring diagram
My only thought right now is opening up the ceiling and installing a piece of duct sheetmetal to separate the joist cavity into two space, one for the cold air return and one for the electrical. .Why do you need a cold air return in the hallway? If so, does it need to be a full stud bay? If so, can you shift the first 2 studs over the 1.5" you need, keeping them both 16"? Also, you're using steel studs meaning the air space is a true . 2017 NEC 300.22 C Exception, allows nm cable in cold air return perpendicular to the return ? infinity Moderator. Staff member. Location New Jersey Occupation Journeyman Electrician Dec 6, 2018 #2 Yes if the return is formed with a stud space. S. Stevenfyeager Senior Member. Location United States, Indiana
The cold air return / joist cavity is between the 1st and 2nd level, so no additional space available. . Although with these low profile lights, there is a non airtight junction box which would be problematic as well. Reply reply More replies.
The Duct-board Return Air Box is an R6 insulated box that installs traditionally in a ceiling. Can accept any size collar up to 18 in. Diameter (not included). Used as a central return vent box (Filter Grill Not included). Can be easily cut to size. Product is "knocked down" for shipping and must be assembled.
Take advantage of the durable 30-gauge zinc-coated, galvanized steel construction of this Master Flow 20 in. x 25 in. Return Air Box to equip your HVAC system with a long-lasting air return box. Its 20 in. x 25 in. opening acts as a convenient connection from return fittings to a ceiling or wall grill (not included) for return air needs. They put in 2 cold air returns. First run one is a 12 inch flex duct to one return grill. What size return grill should this have? The second run is a 16 inch flex duct to a junction box that split off into 4 separate runs and return grills. What size do the return grills need to be? The exception to 300.22(C) permits cable to pass through joist or stud spaces of a dwelling unit. The joist space is covered with sheet metal and used as a cold-air return for a forced warm-air central heating system. Equipment such as junction boxes or device enclosures is not permitted in this location. l69norm wrote: ↑+1, I had the same impression as the OP - NM90 is allowed to go across a cold air return, but not run along the inside a cold air return. We have to use special LAN cable for runs along the inside of an air return (i.e. FT6 vs. FT4), so I'm surprised that regular electrical wiring is allowed.
The exception to 300.22(C) permits cable to pass through joist or stud spaces of a dwelling unit. The joist space is covered with sheet metal and used as a cold-air return for a forced warm-air central heating system. Equipment such as junction boxes or device enclosures is not permitted in this location. I built a return box for a size 2 1/2 ton american standard ac unit airhandler Is there a reason why one would not just use the plastic box and cover for a junction box either in an attic or basement. I can see a problem attaching blank cover plates to plastic but maybe I am not shopping in the right place. . No cold air return vents and not really enough room to run sufficient duck work to pull hot air off the ceilings .TOCRETOARE Outdoor Electrical Junction Box, 20 x 16x8'' NEMA 4X Enclosure Box, Wall Mounted IP66 Waterproof & Dustproof Lockable Metal Junction Box 4.5 out of 5 stars 45 2 offers from 24 $ 90 24
Working on electrical. Need to install a light switch for a bedroom. Since the door opens in the corner, I have these two adjacent stud spaces for the light switch (as it typical on the strike side of the door). Trouble is, these are both cold air returns. Is this allowed? I am using PVC electrical (blue) boxes and 14/2 Romex solid NM-B W/G Wire. The exception to 300.22© permits cable to pass through joist or stud spaces of a dwelling unit. The joist space is covered with sheet metal and used as a cold-air return for a forced warm-air central heating system. Equipment such as junction boxes or device enclosures is not permitted in this location.Sheet Metal Duct Box CA582020 20X20X6 RETURN BOX NON-INSULATED . Call for price Available: In Stock. Sheet Metal Pan CA58121204 12X12X4 RETURN BOX NON-INSULATED . Call for price . Sheet Metal Duct Box CA602025144 20X25-14 RETURN AIR BOX. Call for price Available: Call for Availability. Sheet Metal Duct Box CA602025164 20.25X25.25-16 RETURN .Running wiring perpendicularly across or through a cold air return cavity, one that is utilizing joist space is very common, and is allowed, so long as it is properly protected. . Maybe remove that wire from the duct work put a junction box in .
Part of the job involves extending an existing cold air return constructed by installing "Thermopan" on the bottom of the floor joists. Ordinary this would be a simple job, but there is an existing thermostat wire that goes through the area and up thru the floor into a wall directly above the planned cold air return extension.
Update: Been doing some more reading and I'm going to look into moving those returns to the opposite wall. If I move it beside the supply register then the hot air that comes out will just move a few feet back into the intake and at that point I may as well just close them both off since it won't be doing much to distribute heat or circulate the air.
Electrical - AC & DC - Switch in Cold Air Return - The space between 2 studs in a bedroom wall is being used as a cold air return for the heating system. Can I put a switch for a light in this cold air return? . It does not allow romex lengthwise in an air return, nor does it allow plastic boxes in air returns. Your picture pretty much .VEVOR Electrical Enclosure, 24'' x 24'' x 12'', NEMA 4 Outdoor Enclosure, IP65 Waterproof & Dustproof Cold-Rolled Carbon Steel Hinged Junction Box for Outdoor Indoor Use, with Rain Hood - Amazon.com. . Read full return policy . Customer Support . Fixing things is quick & easy. The joist space is covered with sheet metal and used as a cold-air return for a forced warm-air central heating system. [highlight]Equipment such as junction boxes or device enclosures is not permitted in this location.[/highlight]" but 300.22(C)(2) states: "Equipment.
many of the occ. sensor power packs aren't designed for the LV side to be installed in a junction box. usually there is a 1/2" nipple on the 120v wiring that can be installed in a junction box. some of them say you can install the entire unit inside a junction box, but then you have 120v and 12v terminations inside the same box, and they can be . Ensure proper return air flow for your 17.5 in Winchester residential electric furnace application with this easy to assemble return air box. The flexible design allows for connection of a new or existing side air return on either side based on the placement of the reinforced sheet metal panel of the return air box assembly.
Study with Quizlet and memorise flashcards containing terms like Are circuits that operate at voltages in excess of 750 Volts covered by section 12?, When a cold-air return duct is formed, by boxing in between joists, can a non-metallic sheathed NMD90 cable be run through it?, Which table should be consulted to determine which single conductors or cable assemblies are . You are right, the NEC does not allow junction boxes in plenums, and since my HALO fixture has a junction box on it, that would violate this code. The return air plenum is in the ceiling joist area (no metal duct), between the downstairs wall and an upstairs wall stack heading up to the furnace. I have 9" of clearance in this plenum area. The exception to 300.22(C) permits cable to pass through joist or stud spaces of a dwelling unit, as illustrated in Exhibit 300.21. The joist space is covered with sheet metal and used as a cold-air return for a forced warm-air central heating system. Equipment such as junction boxes or device enclosures is not permitted in this location. Electrical - AC & DC - Electrical junction box in floor joist air return space - I have quite a bit of electrical wiring experience. I know about prohibitions regarding electrical wiring in air returns, but I wonder if this might be different. . I found this motor also slowed from 3469 rpm, cold, to 2800 rpm, hot. So I digged into it and .
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junction box in cold air return|cold air return system