Strain Relief System Selection Chart
Cord or Conduit Type Fitting or Page
Grip Type Application Features Range Inches (cm) Attachment Number
Deluxe Cord Outdoors or indoors where Aluminum fittings, .187”-3.250” PG, N.P.T. aluminum, T-60, T-61,
Aluminum subjected to moisture or stainless steel mesh, (.47-8.25) male straight, T-64
Fitting/ splash. Examples are crane neoprene oil-and- 45° male, 90° male,
Stainless and hoist pendant drop watertight bushing. female straight.
SteelGrip stations, hand tools, pumps Double-single weave. Thread sizes 3/8”-3”.
and processing equipment.
Deluxe Cord Outdoors or indoors where Nylon fitting, stainless .187”-1.125” N.P.T. nylon, T-62
Nylon Fitting/ subjected to moisture or steel mesh, double-single (.47-2.86) male straight,
Stainless splash. Examples are weave, neoprene oil-and- 90° male. Thread
SteelGrip marine and food watertight bushing. sizes 1/2”-1”.
processing equipment.
Deluxe Cord Indoor or outdoors. Non-metallic grip is .187”-1.000” N.P.T. nylon, T-63
Nylon Fitting/ Provides liquidtight seal, corrosion resistant, (.47-2.54) straight male, thread sizes 3/8”-1”
Non-metallic where exposed to moisture. nonconductive and 90° male, thread sizes 1/2”-1”.
Grip Excellent for oil refining provides superior grip-
and chemical processing. ping and flexing benefits.
Neoprene liquidtight
bushing. Nylon fitting.
Deluxe Cord Indoor or outdoor use where Stainless steel fitting .187”-1.000” Straight male T-63
Stainless exposed to moisture. Very and grip for strength. (.47-2.54) Only with N.P.T.
SteelFitting strong for heavy abuse areas Neoprene liquidtight Thread sizes 1/2”-1”.
And Grip such as drilling platforms, bushing. Double/single
steel mills and mines. weave grip.
Wide Range Indoor use only for wiring Neoprene gasket–seals .240”-2.450” Straight male N.P.S. T-67
Strain Relief of electrical enclosures, out cips, dirt, dust. (.61-6.22) or N.P.T.
machine tools, portable One piece design with
power tools, bus drop galvanized steel mesh.
cable systems. Insulating bushing available.
Zinc-plated steel locknut.
Non-metallic Wiring or machine tools, Stainless steel mesh, .375”-2.008” N.P.T. steel, T-100
Flexible electrical enclosures, liquidtight fittings with trade size male Hubbell fittings,
Conduit Grip motors and systems “O” ring and locknut. straight male, 90°
(UL Type A) where conduit is subject Thread sizes 1/2”-2”.
to vibration and strain.
Liquidtight, Wiring of machine tools, Stainless steel mesh, .375”-4.000” N.P.T. 1/2”-4”, T-101
Flexible, electrical enclosures, motors liquidtight fittings. trade sizes Hubbell fittings,
Metal and systems where metallic Sealing “O” rings Male straight,
Conduit Grip liquidtight flexible conduit (optional). Choice of 45° male, 90° male,
is subjected to vibration, fittings. female straight.
flexure, motion or strain.
Technical Data Wire Management Products
Kellems®Grips for Strain Relief
Technical Section
T-68 Dimensions in Inches (mm)
www.hubbell-wiring.com
Kellems Strain Relief Grips are designed to prevent
tension from being transmitted to joints and
terminals on electrical cord, cable and conduit. In
most applications, a Kellems grip for strain relief is
stronger than the cable itself and gives much
greater security than the use of a fitting alone.
Kellems Grips for strain relief help make electrical
systems safer, and save money by minimizing
downtime from costly electrical failure due to cable
pull-out. Kellems Grips also aid in compliance with
the National Electric Code’s terminal tension
protection requirements (see NEC Section 400-10.).
Select the Correct Grip for Strain Relief
Kellems Grips for strain relief are designed to fit on
electrical cord, cable or flexible conduit.
Step 1 Refer to the chart below to determine the grip style
best suited for your application.
Step 2 Determine your cable outside diameter or conduit size.
Step 3 Locate environment—indoors or outdoors.
Step 4 Decide if a liquidtight seal is required.
Step 5 Select N.P.T. size and fitting style.