STW Extension Cords | McMaster-Carr

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34 Products

About Industry Designation for Cable Insulation

About Extension Cords

NEMA 5-15 Plug

NEMA 5-15 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.

				Cord
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 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

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	0.605"	PVC Plastic	STW	UL Listed, C-UL Listed	Black	00000000	000000

Extension Cord Adapters

NEMA 5-15 Plug × NEMA 5-20 Socket

NEMA 5-15 Plug × NEMA L5-20 Socket

NEMA 5-15 Plug × NEMA L5-30 Socket

NEMA L5-20 Plug × NEMA 5-15 Socket

NEMA L5-30 Plug × NEMA L14-30 Socket

NEMA L14-20 Plug × NEMA L14-30 Socket

NEMA L14-30 Plug × NEMA 6-20 Socket

NEMA L14-30 Plug × NEMA 6-50 Socket

NEMA L14-30 Plug × NEMA L14-20 Socket

NEMA L14-30 Plug × NEMA L5-30 Socket

NEMA L14-30 Plug × NEMA L6-30 Socket

NEMA 5-15 Plug

NEMA 5-20 Socket

NEMA L5-20 Socket

NEMA L5-30 Socket

NEMA 5-15 Socket

NEMA L5-20 Plug

NEMA L5-30 Plug

NEMA L14-30 Socket

NEMA L6-30 Socket

NEMA L14-20 Plug

NEMA L14-30 Plug

NEMA 6-20 Socket

NEMA 6-50 Socket

NEMA L14-20 Socket

Change the connection style between an outlet and your equipment.

STW adapters have a water-resistant outer insulation.

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

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

					Cord
Lg.	Wire Gauge	Current, A	Voltage	Power-Indicating Light	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
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 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 × NEMA 6-50 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 × 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
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

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	Black	0000000	00000
25	10	30	125V AC	Without Power-Indicating Light	0.69"	PVC Plastic	STW	UL Listed	Yellow	0000000	00000
50	10	30	125V AC	Without Power-Indicating Light	0.69"	PVC Plastic	STW	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	Yellow	0000000	000000
50	10	20	125V AC/250V AC	Without Power-Indicating Light	0.69"	PVC Plastic	STW	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	Yellow	0000000	000000
50	10	30	125V AC/250V AC	Without Power-Indicating Light	0.69"	PVC Plastic	STW	UL Listed	Yellow	0000000	000000

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

Abrasion-Resistant Extension Cords

Extension Cords with Inline Outlets

Extension Cord Adapters

Abrasion-Resistant Turn-Lock Extension Cords

Extension Cord Splitters