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Electrical Conduit and Fittings Specifications

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Conduit Selection




   Standard Conduit Type       
   Your choices are...
 
      
 
   IMC
 
     Intermediate metal conduit (IMC). Rigid circular raceway with thinner walls than rigid metal conduits (RMC), but the same outside diameter.
 
   RMC
 
     Rigid metal conduit (RMC). Thicker walled and therefore heavier than intermediate metal conduits (IMC), with the same O.D.
 
   GRC
 
     Galvanized rigid conduit (GRC). Metal conduit that has been coated with zinc, and often other agents, to increase resistance to abrasion and corrosion.
 
   FMC
 
     Flexible metal conduit (FMC).  Helically wound circular wireway, often used at the end of a rigid run of conduit to accommodate for machinery positioning or orientation.
 
   LFMC
 
     Liquidtight flexible metal conduit (LFMC). Constructed as flexible metal conduit (FMC) with a liquidtight plastic covering over the flexible metal core.
 
   RNC
 
     Rigid nonmetallic conduit (RNC).  Different types of plastics can be used, typically for areas that are wet or corrosive.
 
   NUCC
 
     Nonmetallic underground conduit with connectors (NUCC).  Somewhat flexible, corrosion-resistant conduit with the electrical conductors factory installed inside the conduit.  May be supplied in reels for field installation, and is constructed to be tough enough to withstand the stresses of field placement.
 
   LFNC
 
     Liquidtight flexible nonmetallic conduit (LFNC).  Liquidtight jacket over an inner flexible, nonmetallic core.  May be reinforced or corrugated to improve strength.
 
   EMT
 
     Electrical metallic tubing (EMT).  Circular wireway with much more workable properties than intermediate metal conduits (IMC), or rigid metal conduit (RMC); may be cut, formed, and bent more easily.
 
   ENT
 
     Electrical nonmetallic tubing (ENT).  Circular corrugated wireway typically made from PVC.
 
   Other
 
     Unlisted, proprietary, or specialized class of conduit.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Conduit / Fitting Description       
   Your choices are...
 
      
 
   Straight Conduit
 
     Straight piece of conduit.
 
   Adapter
 
     A fitting designed to connect different types of pipe together (material, cross-sectional shape, etc.).
 
   Bulkhead Fitting
 
     Fitting designed to mount into a wall or bulkhead and to allow pipe connection on either side of barrier.
 
   Cap
 
     Designed to attach on over the outside of a pipe end to dead-end the flow.  Attachment techniques include welding, brazing, adhesives, and threads, depending on application and material.
 
   Coupling
 
     Fitting designed to join two pieces of conduit.
 
   Elbow - 90°
 
     Allows for a 90° change in direction, frequently includes a curve or radius.  Elbows are also called "Ells".
 
   Elbow - 45°
 
     Elbow configured for a 45° change in direction.
 
   Elbow - Other Angle
 
     Any other angle elbow, such as 30° or 60°.
 
   Expansion Joint / Coupling
 
     Expansion joints and couplings connect sections of pipe and provide allowance for movement due to service load, shock, or thermal cycles.
 
   Flange
 
     Flanges can be fit onto conduit ends to provide mounting geometry.
 
   Gooseneck
 
     Inverted "J" shaped conduit, such as for wiring to a lamp or exterior lighting.
 
   Nipple
 
     Common description of a short piece of conduit for joining two pieces, typically with male threaded ends.
 
   Offset
 
     Fitting between runs of conduit that are parallel but not aligned.
 
   Outlet Box
 
     Box for containing and protecting electrical outlets at the end of a run of wire or cable.
 
   Plug
 
     Designed for insertion into a conduit end to dead-end the run.
 
   Pull / Junction Box
 
     Pull boxes are used at junctions where two runs of conduit meet, and serve as a way to reduce strain on the wire between successive pulls.
 
   Pull Elbow
 
     Similar to a pull box, in that it is covered with a removable plate or lid, for access for pulling wire through.
 
   Reducer
 
     Fitting with different size ends to mate conduit of different diameter.  Concentric reducers join conduit runs on the same axis.
 
   Sweep
 
     Sweeps are bends, typically 90° that curve more gradually than a tight-radius elbow.  See the Size selection below for specifying desired sweep radius.
 
   Tee
 
     Three-port fitting in the shape of a "T".  Standard configuration indicates that the straight-through path (typically called the "run") and the perpendicular section ("branch") all have the same size ports.
 
   U / Return
 
     Most commonly in a 180° "U" shape.  These fittings can be used to reverse conduit direction.
 
   Wye
 
     Three-port fitting in the general shape of the letter "Y" or in which a branch departs the run at an angle other than 90°.  The designation "standard" refers to the three outlets being the same size.
 
   Other
 
     Other unlisted fitting.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
Size




   Standard US Size Designator       
   Your choices are...
 
      
 
   1/2"
 
      
 
   3/4"
 
      
 
   1"
 
      
 
   1¼"
 
      
 
   1½"
 
      
 
   2"
 
      
 
   2½"
 
      
 
   3"
 
      
 
   4"
 
      
 
   5"
 
      
 
   6"
 
      
 
   Other Standard Designator
 
     Other unlisted standard size designator.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Metric Size
 
     Only necessary to use if searching for metric size conduit.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Radius (if applicable)
 
     Radius of items like elbows, sweeps, etc.  Not applicable for straight conduit.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Length (if applicable)
 
     Length of individual segment of conduit.
 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Schedule (if applicable):      Schedule sizes are standards that define ID, OD, and wall thickness of pipe or conduit.  Not all conduits conform to a schedule - this selection will return only those products with a catalog schedule designation.
   Your choices are...
 
      
 
   20
 
      
 
   40
 
      
 
   60
 
      
 
   80
 
      
 
   Other
 
      
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
Material




           
   Your choices are...
 
      
 
   Aluminum
 
     Aluminum is a common industrial conduit with good electrical and thermal conductivity, high reflectivity, and resistance to oxidation.
 
   PVC (Polyvinyl Chloride)
 
     Polyvinyl chloride (PVC) is a widely used material that has good flexibility, smooth surface, and nontoxic qualities. Some grades are used in food and chemical processes due to the inert nature of PVC.

Chlorinated polyvinyl chloride (CPVC) is a grade of PVC engineered to withstand higher temperatures than standard PVC.
 
   PVC Coated Aluminum
 
     Aluminum with a polyvinyl chloride (PVC) coating.
 
   PVC Coated Steel
 
     Any steel grade with a polyvinyl chloride (PVC) coating.
 
   Nylon
 
     Nylon grades such as 6/6 can offer flexibility and good water resistance.
 
   Polyester
 
     Polyester is a family of grades of thermoplastics with good toughness and sometimes high flexibility.
 
   Polyethylene / HDPE
 
     Polyethylene or high-density polyethylene (HDPE) is a light, tough plastic with excellent corrosion resistance and good water barrier qualities.
 
   Galvanized Steel
 
     Galvanized steel has a protective coating of zinc for resistance against corrosion. Galvanized coatings are rated by their weight and carry designations such G30, G60, and G90. Heavier coatings generally provide higher corrosion resistance.
 
   Stainless Steel
 
     Stainless steel is chemical and corrosion resistant and can have relatively high pressure ratings; this selection includes all grades of stainless steel.
 
   Urethane Coated
 
     Polyurethane or urethane refers a diverse class of materials exhibiting good elongation, recovery and toughness properties. They are flexible and have good abrasion resistance, and urethane coated metals are used in conduit for many applications. (NOTE: The urethanes of the plastics industry are so named because the repeating units of their structures resemble the chemical urethane.)
 
   Other
 
     Other unlisted, proprietary or specialized material.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Flexibility       
   Your choices are...
 
      
 
   Rigid Conduit
 
     Maintains straightness and stiffness; not meant to be bent.
 
   Flexible Conduit
 
     Constructed of material that can be field bent or aligned for ease of installation.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Hazardous Location Rated
 
     Conduit is rated to withstand severe conditions of heat, flame, explosion, etc.
 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
Conduit / Fitting End




           
   Your choices are...
 
      
 
   Pipe Thread - Male

DWV Trap Adapter O.D. Tube x M - cast
Courtesy of NIBCO INC.

 
     Includes all tapered pipe threads such as NPT, BSPT, etc.  Tapered threads are used for sealing without gaskets.
 
   Pipe Thread - Female

Adapter C x F - wrot
Courtesy of NIBCO INC.

 
     Includes all tapered pipe threads such as NPT, BSPT, etc.  Tapered threads are used for sealing without gaskets.
 
   Plain End
 
     Straight pipe conduit; often used to insert into the bell end of the connecting pipe.
 
   Bell / Socket / Flare
 
     End length of increased diameter into which a conduit length or fitting end may be fitted.
 
   Flange

Companion Flange C - cast
Courtesy of NIBCO INC.

 
     Circular or square flange is used to connect fitting, typically via bolting or welding.
 
   Other
 
     Other unlisted fitting connection.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
Features / Certifications




   Features       
   Your choices are...
 
      
 
   Magnetic Shielding
 
     Magnetic shielding attenuates magnetic fields to protect sensitive equipment, such as computers.
 
   Integral / Attached Coupling

heavy duty, hinged clamps with electropolished finish
Courtesy of Waukesha Cherry-Burrell

 
     Coupler is attached or captured right onto the end of the conduit or fitting.
 
   Architectural Finish
 
     High quality architectural finish not requiring further finishes.
 
   Underground Rated
 
     Designed and constructed for underground application.
 
   Liquid Tight
 
     Materials, construction, and seals are designed to prevent any ingress of water or other liquids.
 
   Corrosion Resistant
 
     Conduit material is designed with materials and/or coatings to resist corrosion, rust, scaling, etc.
 
   Fire Alarm Conduit
 
     Fire alarm conduit frequently has special ratings and color coding and labeling to signify its importance in building safety.
 
   Prewired Conduit
 
     Conduit with appropriate wire or cable already installed in the conduit.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Certifications       
   Your choices are...
 
      
 
   CSA Mark

CSA Mark

 
     Products that bear a CSA Mark have been tested by the Canadian Standards Association (CSA) and meet applicable standards for safety and/or performance. These standards are written and administered by organizations such as the American National Standards Institute (ANSI), Underwriters Laboratories (UL), and CSA International. CSA Marks may appear alone or with indicators. CSA Marks that appear alone are used with products certified primarily for the Canadian market, to the applicable Canadian standards. CSA Marks that appear with the indicators “C” and “US” or “NRTL/C” are used with products certified for both the U.S. and Canadian markets, to the applicable U.S. and Canadian standards.
 
   UL Listing Mark

UL Listing Mark

 
     The UL Listing Mark indicates that Underwriters Laboratories Inc. (UL) has determined that representative samples of the product meet UL's safety requirements. These requirements are primarily based on UL's own published Standards for Safety. The UL Listing Mark is seen commonly on appliances and computer equipment, furnaces and heaters, fuses, electrical panelboards, smoke and carbon monoxide detectors, fire extinguishers and sprinkler systems, personal flotation devices like life jackets and life preservers, bullet resistant glass, and thousands of other products.
 
   Other
 
     Other unlisted certification, approval, or quality markings presented by an independent testing service or government agency.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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