The most commonly referred to types of Direct Burial wire are USE (Underground Service Entrance) – with a thermoset insulation – Tracer Wire and UF , or “Underground Feeder” – both with thermoplastic insulations.
Is XHHW-2 rated for underground?
Registered. You can’ t run type SE cable underground. You don’t have any problem running individual XHHW conductors in PVC underground.
Is XHHW 2 direct burial?
Southwire’s Alumaflex XHHW-2 is used for conduit or recognized raceways for services, feeders, and branch circuit wiring. Can be used in wet or dry locations with temperatures not to exceed 90 ̊C. Southwire’s XHHW is not rated for direct burial.
What is XHHW-2 wire used for?
XHHW-2 wire is the next generation XHHW wire. While its main use is for residential, commercial and industrial buildings , it is also used in raceways, feeder and circuit wiring. XHHW-2 is approved for use up to 600V and is UL Listed for 90° C (194° F), in both dry and wet locations.
What is difference between XHHW and XHHW-2?
According to Underwriters Laboratories (UL) Standard 44, XHHW insulation is suitable for use in dry locations up to 90° C (194° F), or wet locations up to 75° C (167° F). XHHW-2 insulation, which is similar to XHHW , is suitable for use in dry or wet locations up to 90° C (194° F).
Can XHHW wire be buried?
Southwire’s Alumaflex XHHW-2 is used for conduit or recognized raceways for services, feeders, and branch circuit wiring. Can be used in wet or dry locations with temperatures not to exceed 90 ̊C. Southwire’s XHHW is not rated for direct burial .
Is XHHW better than THWN?
Even though its jacket is thicker and more protective, XHHW is also more flexible than THHN wire . The XLPE insulation of the XHHW allows the cable to bend and flex better than the THHN’s PVC insulation—so XHHW is much easier to work with during the installation process.
How deep should direct bury wire be?
Direct Burial of Cables or Conductors
Bury UF cables 24 inches below the soil surface , and 18 inches deep when protected by 2 inches of concrete.
Can I bury water line and electric together?
If trench is to be a joint trench (shared with other utilities) the following separations must be maintained: 24 inches between gas and electric lines. 12 inches between water and electric lines . ... 12 inches between communications and electric lines.
Can you run direct burial wire through conduit?
Direct-burial cable can be run inside the conduit to add additional protection to any electrical system. This type of cable is designed to withstand direct exposure to the soil and moisture and is rated for wet, dry, and damp environments.
What does the 2 in THWN-2 stand for?
THWN stands for Thermoplastic Heat and Water- resistant Nylon-coated. THHN stands for “Thermoplastic High Heat-resistant Nylon-coated”. THWN-THHN-2 wire is one of the most common single conductor wires used in the United States.
Is Thhn and THWN wire the same?
THHN stands for Thermoplastic High Heat-resistant Nylon-coated. THWN wire is the same , but the “W” stands for water-resistant. The main difference between these two standards is their maximum temperature in wet locations. ... However, most of these wires, so you can use THHN and THWN interchangeably.
What does Thhn mean for wire?
What is thhn wire? THHN is a thermoplastic high-heat-resistant, nylon-coated wire . It’s designed with a specific insulation material, temperature rating, and condition of use for electrical wire and cable.
Can you run Thhn underground in conduit?
Burial depth varies based on location and type of conduit. and NO you cannot use THHN in underground conduit . While most THHN is also dual rated as THWN, not all of it is. You must have that W in there for it to be rated for wet conditions, which underground conduit is.
What type of wire can I run in conduit?
The most common type of cable used in home wiring is non-metallic (NM), or Romex, cable. While NM cable can be run inside a conduit, this is seldom done. The types of wire most commonly installed inside of conduit are THHN and THWN . THHN/THWN wires are individual, insulated, and color-coded wires.
What does AWG stand for?
AWG ( American Wire Gauge ) is a U.S. standard set of non-ferrous wire conductor sizes.
