STW Cable | McMaster-Carr

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50 Products

About Industry Designation for Cable Insulation

About Extension Cords

90° Elbow Plug × Wire Leads

NEMA 14-30 Plug

NEMA 14-50 Plug

Connect equipment and devices to a power supply.

Cords with a NEMA 14-30 or 14-50 plug are often used to power electric vehicles. They have a high current rating.

Cords with a 90° elbow plug fit flush against a wall outlet, so they fit behind machinery or in areas where space is tight.

The insulation on STW and SJTW cords resists water.

				Cord
Wire Gauge	Current, A	Voltage	Lg., ft.	OD	Insulation Material	Industry Designation	Temp. Range, °F	Specifications Met	Color		Each
90° Elbow NEMA 14-30 Plug × Wire Leads
10	30	125V AC/250V AC	10	0.72"	PVC Plastic	STW	0° to 140°	UL Listed	Yellow	000000000	000000
10	30	125V AC/250V AC	25	0.72"	PVC Plastic	STW	0° to 140°	UL Listed	Yellow	000000000	00000
90° Elbow NEMA 14-50 Plug × Wire Leads
8, 6	50	125V AC/250V AC	4	1.08"	PVC Plastic	STW	0° to 140°	UL Listed	Black	000000000	00000
8, 6	50	125V AC/250V AC	30	1.08"	PVC Plastic	STW	0° to 140°	UL Listed	Black	000000000	000000
8, 6	50	125V AC/250V AC	36	1.08"	PVC Plastic	STW	0° to 140°	UL Listed	Black	000000000	000000

Abrasion-Resistant Turn-Lock Extension Cords

NEMA L5-20 Plug

NEMA L5-20 Socket

NEMA L5-30 Plug

NEMA L5-30 Socket

NEMA L14-20 Plug

NEMA L14-20 Socket

NEMA L14-30 Plug

NEMA L14-30 Socket

Thick insulation protects the internal wires of these cords, so they can be used in high-traffic areas and over rough areas. The insulation also resists water. Give the connectors a quarter turn to lock in place; they remain secure in high-vibration applications.

					Cord
Lg., ft.	Wire Gauge	Current, A	Voltage	Power-Indicating Light	OD	Insulation Material	Industry Designation	Specifications Met	Color		Each
NEMA L5-20 Plug × NEMA L5-20 Socket
25	10	20	125V AC	Without Power-Indicating Light	0.63"	PVC Plastic	STW	__	Yellow	0000000	000000
50	10	20	125V AC	Without Power-Indicating Light	0.63"	PVC Plastic	STW	__	Yellow	0000000	000000
NEMA L5-30 Plug × NEMA L5-30 Socket
10	10	30	125V AC	Without Power-Indicating Light	0.67"	PVC Plastic	STW	UL Listed, C-UL Listed	Black	0000000	00000
25	10	30	125V AC	Without Power-Indicating Light	0.69"	PVC Plastic	STW	UL Listed, C-UL Listed	Yellow	0000000	00000
50	10	30	125V AC	Without Power-Indicating Light	0.69"	PVC Plastic	STW	UL Listed, C-UL Listed	Yellow	0000000	000000
NEMA L14-20 Plug × NEMA L14-20 Socket
25	10	20	125V AC/250V AC	Without Power-Indicating Light	0.69"	PVC Plastic	STW	UL Listed, C-UL Listed	Yellow	0000000	000000
50	10	20	125V AC/250V AC	Without Power-Indicating Light	0.69"	PVC Plastic	STW	UL Listed, C-UL Listed	Yellow	0000000	000000
NEMA L14-30 Plug × NEMA L14-30 Socket
25	10	30	125V AC/250V AC	Without Power-Indicating Light	0.69"	PVC Plastic	STW	UL Listed, C-UL Listed	Yellow	0000000	000000
50	10	30	125V AC/250V AC	Without Power-Indicating Light	0.69"	PVC Plastic	STW	UL Listed, C-UL Listed	Yellow	0000000	000000
100	10	30	125V AC/250V AC	Without Power-Indicating Light	0.72"	PVC Plastic	STW	UL Listed, C-UL Listed	Yellow	0000000	000000

Extension Cords for Welding

NEMA 6-50 Plug

NEMA 6-50 Socket

Run power to welders in machine shops, garages, and other areas where these cords will be exposed to harsh conditions. These cords have either EPDM or PVC insulation that protects the cord's wires from weld slag and being dragged, kicked, and stepped on. Their insulation also won't crack or become brittle when exposed to oil, water, and weather. They also stay flexible across a wide range of temperatures. A power-indicating light on the socket illuminates when the cord has power.

NEMA 6-50 cords can be used with higher voltage equipment than NEMA 5-15 cords. Use them with portable MIG welders rated up to 400 amps as well as TIG welders, stick welders, and plasma cutters rated up to 250V AC. They have a light that illuminates when they’re grounded safely. A handle makes them easy to plug in and unplug.

				Cord
Wire Gauge	Current, A	Voltage	Power-Indicating Light	OD	Insulation Material	Industry Designation	Specifications Met	Features	Color		Each
NEMA 6-50 Plug × NEMA 6-50 Socket
25 ft.
8	50	250V AC	With Power-Indicating Light	0.85"	PVC Plastic	STW	ETL Listed, C-ETL Listed	Ground-Indicating Light, Handle	Black	0000000	0000000
50 ft.
8	50	250V AC	With Power-Indicating Light	0.85"	PVC Plastic	STW	ETL Listed, C-ETL Listed	Ground-Indicating Light, Handle	Black	0000000	000000

Abrasion-Resistant Extension Cords

Plug × Socket

90° Elbow Plug with Handle × Socket

90° Elbow Plug × Socket

NEMA 5-15 Plug

NEMA 5-15 Socket

NEMA 14-50 Plug

NEMA 14-50 Socket

NEMA TT-30 Plug

NEMA TT-30 Socket

Thick insulation protects the internal wires of these cords, so they can be used in high-traffic areas and over rough surfaces. The industry designation is STW, so the insulation resists water.

Cords with a NEMA 14-50 plug and socket have a high current rating and are often used to power electric vehicles. The light on their socket illuminates when the cord has power. Their plug and socket have handles, making them easy to grip when plugging or unplugging them.

Cords with a NEMA TT-30 plug and socket are commonly used to power RVs. They have a high current rating.

Cords with a 90° elbow plug fit flush against a wall outlet, so they fit behind machinery or in areas where space is tight.

					Cord
Wire Ga.	Current, A	Voltage	Power-Indicating Light	Features	OD	Insulation Material	Industry Designation	Specifications Met	Color		Each
Straight NEMA 5-15 Plug × NEMA 5-15 Socket
25 ft.
14	15	125V AC	Without Power-Indicating Light	__	0.5"	PVC Plastic	STW	UL Listed	Orange	0000000	000000
12	15	125V AC	Without Power-Indicating Light	__	0.56"	PVC Plastic	STW	UL Listed	Orange	0000000	00000
50 ft.
14	15	125V AC	Without Power-Indicating Light	__	0.5"	PVC Plastic	STW	UL Listed	Orange	0000000	00000
12	15	125V AC	Without Power-Indicating Light	__	0.56"	PVC Plastic	STW	UL Listed	Orange	0000000	000000
100 ft.
14	13	125V AC	Without Power-Indicating Light	__	0.5"	PVC Plastic	STW	UL Listed	Orange	0000000	000000
12	15	125V AC	Without Power-Indicating Light	__	0.56"	PVC Plastic	STW	UL Listed	Orange	0000000	000000
90° Elbow NEMA 14-50 Plug × NEMA 14-50 Socket
15 ft.
8, 6	50	125V AC/250V AC	With Power-Indicating Light	Handle	1.08"	PVC Plastic	STW	UL Listed, C-UL Listed	Black	00000000	000000
30 ft.
8, 6	50	125V AC/250V AC	With Power-Indicating Light	Handle	1.08"	PVC Plastic	STW	UL Listed, C-UL Listed	Black	00000000	000000
50 ft.
8, 6	50	125V AC/250V AC	With Power-Indicating Light	Handle	1.08"	PVC Plastic	STW	UL Listed, C-UL Listed	Black	00000000	000000
90° Elbow NEMA TT-30 Plug × NEMA TT-30 Socket
25 ft.
10	30	125V AC	Without Power-Indicating Light	__	0.67"	PVC Plastic	STW	UL Listed, C-UL Listed	Black	00000000	00000
50 ft.
10	30	125V AC	Without Power-Indicating Light	__	0.67"	PVC Plastic	STW	UL Listed, C-UL Listed	Black	00000000	000000

Extension Cords with Inline Outlets

With Three Outlets

With Six Outlets

NEMA 5-15 Plug

NEMA 5-15 Socket

In addition to an outlet on the end, these cords have multiple inline outlets. Each outlet has a power indicating light that illuminates when the cord has power. The industry designation is STW, so the insulation resists water.

						Cord
Lg., ft.	No. of Outlets	Wire Gauge	Current, A	Voltage	Power-Indicating Light	OD	Insulation Material	Industry Designation	Specifications Met	Color		Each
NEMA 5-15 Plug × NEMA 5-15 Socket
25	3	14	15	125V AC	With Power-Indicating Light	0.5"	PVC Plastic	STW	UL Listed, C-UL Listed	Yellow	0000000	000000
50	6	12	15	125V AC	With Power-Indicating Light	0.63"	PVC Plastic	STW	UL Listed, C-UL Listed	Black	0000000	000000

Extension Cord Adapters

Plug × Socket

90° Plug × 90° Socket with Handle

Plug × Socket × Socket

Plug × 90° Socket with Handle

NEMA 5-15 Plug

NEMA 5-20 Socket

NEMA L5-20 Socket

NEMA L5-30 Socket

NEMA 14-30 Plug

NEMA 14-50 Socket

NEMA 14-50 Plug

NEMA 5-15 Socket

NEMA 6-50 Socket

NEMA L5-20 Plug

NEMA L5-30 Plug

NEMA L14-30 Socket

NEMA L6-30 Socket

NEMA L6-20 Socket

NEMA L6-30 Plug

NEMA L14-20 Plug

NEMA L14-30 Plug

NEMA 6-20 Socket

NEMA L14-20 Socket

Change the connection style between an outlet and your equipment.

NEMA 14-30 and NEMA 14-50 adapters are commonly used to charge electric vehicles.

Adapters with a 90° elbow plug sit flush against wall outlets to fit in tight spaces.

Adapters with a power-indicating light have a light on the socket that illuminates when the adapter has power.

Adapters with a handle make it easy to pull plugs out of sockets.

STW and SJTW adapters have a water-resistant outer insulation.

For technical drawings and 3-D models, click on a part number.

						Cord
Lg.	Wire Gauge	Current, A	Voltage	Power-Indicating Light	Features	OD	Insulation Material	Industry Designation	Specifications Met	Color		Each
NEMA 5-15 Plug × NEMA 5-20 Socket
1 ft.	12	15	125V AC	Without Power-Indicating Light	__	0.61"	PVC Plastic	STW	UL Listed, C-UL Listed	Black	0000000	000000
NEMA 5-15 Plug × NEMA L5-20 Socket
9"	12	15	125V AC	Without Power-Indicating Light	__	0.56"	Rubber	STW	UL Listed	Yellow	0000000	00000
1 ft.	12	15	125V AC	Without Power-Indicating Light	__	0.61"	PVC Plastic	STW	UL Listed, C-UL Listed	Yellow	0000000	00000
NEMA 5-15 Plug × NEMA L5-30 Socket
1 ft.	10	15	125V AC	Without Power-Indicating Light	__	0.69"	PVC Plastic	STW	__	Yellow	0000000	00000
90° Elbow NEMA 14-30 Plug × 90° Elbow NEMA 14-50 Socket (with Handle)
1 1/2 ft.	10	30	125V AC/250V AC	Without Power-Indicating Light	Handle	0.72"	PVC Plastic	STW	__	Yellow	0000000	00000
90° Elbow NEMA 14-50 Plug × 90° Elbow NEMA 6-50 Socket (with Handle)
1 1/2 ft.	6	50	125V AC/250V AC	Without Power-Indicating Light	Handle	0.85"	PVC Plastic	STW	__	Yellow	0000000	00000
NEMA L5-20 Plug × NEMA 5-15 Socket
9"	12	15	125V AC	Without Power-Indicating Light	__	0.56"	Rubber	STW	UL Listed	Yellow	0000000	00000
1 ft.	10	20	125V AC	With Power-Indicating Light	__	0.67"	PVC Plastic	STW	UL Listed, C-UL Listed	Yellow	0000000	00000
NEMA L5-30 Plug × NEMA L14-30 Socket
1 1/2 ft.	10	30	125V AC	Without Power-Indicating Light	__	0.69"	PVC Plastic	STW	__	Yellow	0000000	00000
NEMA L6-30 Plug × NEMA L6-20 Socket
3 ft.	10	30	250V AC	Without Power-Indicating Light	__	0.67"	PVC Plastic	STW	__	Yellow	0000000	00000
NEMA L14-20 Plug × NEMA L14-30 Socket
1 1/2 ft.	10	20	125V AC/250V AC	Without Power-Indicating Light	__	0.69"	PVC Plastic	STW	__	Yellow	0000000	00000
NEMA L14-30 Plug × NEMA 6-20 Socket
1 1/2 ft.	10	30	125V AC/250V AC	Without Power-Indicating Light	__	0.69"	PVC Plastic	STW	__	Yellow	0000000	00000
NEMA L14-30 Plug × 90° Elbow NEMA 6-50 Socket
1 1/2 ft.	10	30	125V AC/250V AC	Without Power-Indicating Light	Handle	0.69"	PVC Plastic	STW	__	Yellow	0000000	00000
NEMA L14-30 Plug × NEMA L5-30 Socket
1 1/2 ft.	10	30	125V AC	Without Power-Indicating Light	__	0.69"	PVC Plastic	STW	__	Yellow	0000000	00000
NEMA L14-30 Plug × NEMA L6-30 Socket
1 1/2 ft.	10	30	125V AC/250V AC	Without Power-Indicating Light	__	0.69"	PVC Plastic	STW	__	Black	0000000	00000
NEMA L14-30 Plug × NEMA L14-20 Socket
1 1/2 ft.	10	30	125V AC/250V AC	Without Power-Indicating Light	__	0.69"	PVC Plastic	STW	__	Yellow	0000000	00000

Extension Cord Splitters

Power multiple devices from the same outlet with these splitters.

STW splitters have a water-resistant insulation.

For technical drawings and 3-D models, click on a part number.

Two-Outlet Splitters

With Two Outlets

NEMA 5-15 Plug

NEMA 5-15 Socket

NEMA L5-20 Plug

NEMA L5-20 Socket

					Cord
Lg., ft.	Wire Ga.	Current, A	Voltage	Power-Indicating Light	OD	Insulation Material	Industry Designation	Specifications Met	Color		Each
NEMA 5-15 Plug × NEMA 5-15 Socket
2	12	15	125V AC	Without Power-Indicating Light	0.56"	Rubber	STW	UL Listed	Yellow	0000000	000000
NEMA L5-20 Plug × NEMA L5-20 Socket
1 1/2	12	20	125V AC	Without Power-Indicating Light	0.56"	Rubber	STW	UL Listed	Yellow	0000000	00000

Three-Outlet Splitters

With Three Outlets

NEMA 5-15 Plug

NEMA 5-15 Socket

NEMA L5-20 Plug

NEMA L5-20 Socket

					Cord
Lg., ft.	Wire Ga.	Current, A	Voltage	Power-Indicating Light	OD	Insulation Material	Industry Designation	Specifications Met	Color		Each
NEMA 5-15 Plug × NEMA 5-15 Socket
2	12	15	125V AC	Without Power-Indicating Light	0.56"	Rubber	STW	UL Listed	Yellow	0000000	000000
NEMA L5-20 Plug × NEMA L5-20 Socket
1 1/2	12	20	125V AC	Without Power-Indicating Light	0.56"	Rubber	STW	UL Listed	Yellow	0000000	00000

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About Industry Designation for Cable Insulation

About Extension Cords

Power Cords

Abrasion-Resistant Turn-Lock Extension Cords

Extension Cords for Welding

Abrasion-Resistant Extension Cords

Extension Cords with Inline Outlets

Extension Cord Adapters

Extension Cord Splitters