- Can your adapters be used with EB35 utility duct?
Our Rigid PVC nonmetallic electrical conduit adapters can be used with EB20, DB60, EB35, DB120 and DB100 utility duct as well as Schedule 40 and Schedule 80 conduit.
- What other manufacturer's covers can be used with the CANTEX floorbox?
Several brands of covers and rings can be used with our floorbox. Click here for a pdf of the chart detailing the compatible brands.
- Can your Schedule 40 bends be encased in concrete?
Yes. Our Schedule 40 and Schedule 80 bends, both standard radius and special radius, can be used for jobs requiring concrete encasement, direct burial or may be installed in direct sunlight. For allowable installations and restrictions see NEC Article 352.
- What is type “RNC”?
Rigid Nonmetallic Conduit
- What NEMA standard applies to your Schedule 40 elbows?
- Are your Schedule 40 elbows suited for installations that would be exposed to direct sunlight?
Our Sch. 40 elbows are classified as “Sunlight Resistant” per UL651 specifications.
- Is there a fire rating on PVC conduit and fittings?
Yes. UL Flame rating is UL 94V-0.
- Does the temperature effect PVC conduit installations?
Recommended maximum temperature is 122°F (50°C) and minimum installation temperature of -4°F (-20°C). If the conduit is exposed to either extreme, expansion couplings should be placed at the recommended interals.
- What determines the need for Schedule 80 as opposed to Schedule 40?
As directed by the NEC, Section352.44, Schedule 80 is to be used in areas of possible damage.
- Are there Schedule 80 fittings?
Schedule 80 elbows are available. For other fittings and accessories, Schedule 40 fittings are used in the Schedule 80 installations.
- Is Schedule 40 PVC conduit the same as Schedule 40 PVC water pipe?
No. Schedule 40 conduit is not to be used for the transmission of water or gas.
- What is the UL Standard number for utility duct?
Standard for EB-20 is UL 651. All utility duct conforms to ASTM F-512 and meets NEMA Standard NEMA TC 6&8.
- Can DB-120 utility duct be encased in concrete?
Yes. DB-60 and DB-120 can be buried directly or encased in concrete. EB-20 and EB-35 must be encased in concrete.
- Where can I find information on PVC Conduit?
There are many sources for information on rigid nonmetallic conduit. The National Electrical Code (NEC) is always your best source. This is the code used by most inspecting agencies. Other good sources are Underwriters Laboratories (UL) and National Electrical Manufacturers Association (NEMA). NEMA has many useful guides for use and installation of RNC. Go to either website and follow the easy to use menus.
www.nema.org or www.ul.com.
- What is the temperature limit for PVC conduit?
The maximum ambient use temperature is 50°C (122°F). The minimum installation temperature is -20°C ( -4°F ).
- What is the fire rating of your PVC conduit?
CANTEX PVC conduit is rated UL 94V-0. This means it is self-extinguishing and will not support burning. Test results show CANTEX RNC has an ASTM E84 Flame Spread Index (FSI) of 15 to 20 and a Smoke Developed Index (SDI) of 765 to 805.
- Can CANTEX PVC conduit be used to penetrate fire-walls or ceilings?
Yes, any Listed PVC conduit can be used in this manner. However you must use a Listed fire stop in conjunction with the conduit. 3M and Hilti both offer these products.
- How do I get a letter stating your products are UL Listed?
You do not need one. Go to the UL website and look up listed manufacturers. If necessary, print the page. The UL listing mark is clearly printed on the product.
- How many expansion joints do I need to use?
This can be calculated or determined from Table 352.44 of the 2011 NEC. A number of factors determine how many expansion joints will be required. This information is also available in the engineering section of this website. A really comprehensive installation manual is available free of charge from the NEMA website at www.nema.org.
- Does CANTEX Sch. 40 and Sch. 80 conduit meet Federal Specification W-C-1094 (A)?
Federal Specification W-C-1094 cancelled September 13, 1985. It was replaced with the following specifications : UL 514B, UL 514C, UL 651 and UL 651A. CANTEX Sch. 40 and SCH. 80 PVC conduits meet UL 651 and therefore meet the discontinued specification W-C-1094 (A). These standards have been adopted by GSA-FSS and DoD.
- What specifications does CANTEX RNC meet?
CANTEX rigid nonmetallic PVC conduit meets the following specifications and standards: UL standard 651 and NEMA standard TC-2.
- Is CANTEX EZ Flex plenum rated?
No, CANTEX EZ Flex ENT is not plenum rated.
- Can EZ Flex be directly buried in the dirt?
No, NEC Article 362 forbids the direct burial of any manufacturers ENT.
- Can I use EZ Flex in outdoor exposed locations?
No, CANTEX EZ Flex is not rated for applications exposed to the direct rays of the sun.
- Is there a voltage limit for ENT?
Yes, all ENT is restricted to 600 Volts or less.
- What is the maximum temperature for EZ Flex ENT?
Maximum ambient use temperature is 50°C (122°F) minimum installation temperature is -20°C (-4°F)
- What kind of cement do I use with EZ Flex ENT?
You MUST use CANTEX #50 ENT Cement. Regular cement if too aggressive for ENT.
- Can I use regular Sch.. 40 couplings and fittings with EZ Flex ENT?
Yes, you can use regular Sch.. 40 PVC fittings with EZ Flex.
- What standards does EZ Flex ENT meet?
CANTEX EZ Flex ENT meets the following standards and specifications : UL standard 1653, NEMA Standard TC-13 and CSA Standard C22.2 No. 227.
- Can EZ Flex be encased in concrete?
Yes, CANTEX EZ Flex ENT and listed ENT fittings can be encased in concrete.
- Is CANTEX EZ Flex rated for use with 90°C wire?
Yes, CANTEX EZ Flex is listed for use with 90°C wire.
- Do I need expansion couplings for my EZ Flex installation?
No, by definition the conduit is flexible and does not need expansion couplings. Do not firmly install brackets to the ENT as this will prevent the conduit from flexing during periods of heating and cooling. The conduit must be securely fastened within 3 feet of any terminations. Do not stretch ENT during installation, let it lay naturally. Horizontal runs of ENT must be supported every 3 feet