1 Scope
1.1 The requirements in this standard cover sealed wire connector systems, including insulating caps,
covers, resins, tubing, and tapes provided with, or for use with, specific wire connectors. These systems
are intended for wet or damp locations and other installations such as:
a) Direct burial,
b) Below grade,
c) Above grade where exposed to sunlight; or
d) Where exposed to sea water or salt water.
The wire connectors covered by these requirements are intended for use with copper conductor, aluminum
conductor, or both in accordance with installations covered by the National Electrical Code, NFPA 70; CSA
C22.1, Canadian Electrical Code, Part I; and NOM 001 SEDE, Standard for Electrical Installations.
1.2 These requirements apply to sealed wire connector systems intended for use at 1500 V or less, with
currents not exceeding the ampacity of insulated conductor types noted below, rated either 75 °C (167 °F)
or 90 °C (194 °F):
a) 14 AWG (2.08 mm2) through 2,000 kcmil (1,012 mm2) conductors: Types RHW, RHW-2, USE,
USE-2, USEB90, USEI75, USEI90, THW, XHHW, XHHW-2, RW90 EP, RW90 XLPE , or TWU,
b) 30 AWG (0.05 mm2) through 16 AWG (1.31 mm2) conductors: Any Type insulation acceptable
for direct burial, below grade use, or wet locations.
1.3 These requirements also cover sealed wire connector systems intended for use with single or
multiple conductor underground feeder cable, golf course sprinkler cable, underground low energy cable,
irrigation cable, or other cable with insulation acceptable for direct burial, below grade use, or wet
locations.
1.4 This standard does not apply to twist-on style splicing sealed wire connectors.